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Articles 1  30 of 52
FullText Articles in Physical Sciences and Mathematics
High Order Harmonic Generation From Sf₆: Deconvolution Of Macroscopic Effects, B. P. Wilson, K. D. Fulfer, S. Mondal, X. Ren, J. Tross, E. D. Poliakoff, J. Jose, AnhThu Le, R. R. Lucchese, Carlos A. TralleroHerrero
High Order Harmonic Generation From Sf₆: Deconvolution Of Macroscopic Effects, B. P. Wilson, K. D. Fulfer, S. Mondal, X. Ren, J. Tross, E. D. Poliakoff, J. Jose, AnhThu Le, R. R. Lucchese, Carlos A. TralleroHerrero
Physics Faculty Research & Creative Works
We measure high order harmonics from the molecule SF₆ over a large range of phase matching conditions and observe several features in the harmonics that are largely independent of such macroscopic conditions. The experimental data are then compared to the quantitative rescattering theory for the generation of harmonics from three orbitals. With this comparison, we are able to assign spectroscopic features in the harmonics to contributions from 1t_{1g} (HOMO) and 5t_{1u} (HOMO1) orbitals.
Prospects For Observing And Localizing GravitationalWave Transients With Advanced Ligo And Advanced Virgo, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Prospects For Observing And Localizing GravitationalWave Transients With Advanced Ligo And Advanced Virgo, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We present a possible observing scenario for the Advanced LIGO and Advanced Virgo gravitationalwave detectors over the next decade, with the intention of providing information to the astronomy community to facilitate planning for multimessenger astronomy with gravitational waves. We determine the expected sensitivity of the network to transient gravitationalwave signals, and study the capability of the network to determine the sky location of the source. We report our findings for gravitationalwave transients, with particular focus on gravitationalwave signals from the inspiral of binary neutronstar systems, which are considered the most promising for multimessenger astronomy. The ability to localize the sources ...
Results Of The Deepest AllSky Survey For Continuous Gravitational Waves On Ligo S6 Data Running On The Einstein@Home Volunteer Distributed Computing Project, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Results Of The Deepest AllSky Survey For Continuous Gravitational Waves On Ligo S6 Data Running On The Einstein@Home Volunteer Distributed Computing Project, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We report results of a deep allsky search for periodic gravitational waves from isolated neutron stars in data from the S6 LIGO science run. The search was possible thanks to the computing power provided by the volunteers of the Einstein@Home distributed computing project. We find no significant signal candidate and set the most stringent upper limits to date on the amplitude of gravitational wave signals from the target population. At the frequency of best strain sensitivity, between 170.5 and 171 Hz we set a 90% confidence upper limit of 5.5 x 10^{25}, while at the high ...
The Rate Of Binary Black Hole Mergers Inferred From Advanced Ligo Observations Surrounding Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
The Rate Of Binary Black Hole Mergers Inferred From Advanced Ligo Observations Surrounding Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
A transient gravitationalwave signal, GW150914, was identified in the twin Advanced LIGO detectors on 2015 September 2015 at 09:50:45 UTC. To assess the implications of this discovery, the detectors remained in operation with unchanged configurations over a period of 39 days around the time of the signal. At the detection statistic threshold corresponding to that observed for GW150914, our search of the 16 days of simultaneous twodetector observational data is estimated to have a falsealarm rate (FAR) of < 4.9 x 10^{6} yr^{1}, yielding a pvalue for GW150914 of < 2 x 10^{7}. Parameter estimation followup on this trigger identifies its source ...
First Targeted Search For GravitationalWave Bursts From CoreCollapse Supernovae In Data Of FirstGeneration Laser Interferometer Detectors, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
First Targeted Search For GravitationalWave Bursts From CoreCollapse Supernovae In Data Of FirstGeneration Laser Interferometer Detectors, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We present results from a search for gravitationalwave bursts coincident with two corecollapse supernovae observed optically in 2007 and 2011. We employ data from the Laser Interferometer Gravitationalwave Observatory (LIGO), the Virgo gravitationalwave observatory, and the GEO 600 gravitationalwave observatory. The targeted corecollapse supernovae were selected on the basis of (1) proximity (within approximately 15 Mpc), (2) tightness of observational constraints on the time of core collapse that defines the gravitationalwave search window, and (3) coincident operation of at least two interferometers at the time of core collapse. We find no plausible gravitationalwave candidates. We present the probability of detecting ...
Quantum Critical Behavior Of The SuperfluidMott Glass Transition, Thomas Vojta, Jack Crewse, Martin Puschmann, Daniel Arovas, Yury Kiselev
Quantum Critical Behavior Of The SuperfluidMott Glass Transition, Thomas Vojta, Jack Crewse, Martin Puschmann, Daniel Arovas, Yury Kiselev
Physics Faculty Research & Creative Works
We investigate the zerotemperature superfluid to insulator transitions in a diluted twodimensional quantum rotor model with particlehole symmetry. We map the Hamiltonian onto a classical (2+1)dimensional XY model with columnar disorder which we analyze by means of largescale Monte Carlo simulations. For dilutions below the lattice percolation threshold, the system undergoes a generic superfluidMott glass transition. In contrast to other quantum phase transitions in disordered systems, its critical behavior is of conventional powerlaw type with universal (dilutionindependent) critical exponents z=1.52(3), ν =1.16(5), ß/ν =0.48(2), γ/ν=2.52(4), and ...
Improved Analysis Of Gw150914 Using A Fully SpinPrecessing Waveform Model, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Improved Analysis Of Gw150914 Using A Fully SpinPrecessing Waveform Model, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
This paper presents updated estimates of source parameters for GW150914, a binary blackhole coalescence event detected by the Laser Interferometer Gravitationalwave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13dimensional, phenomenological precessingspin model (precessing IMRPhenom) and an 11dimensional nonprecessing effectiveone body (EOB) model calibrated to numericalrelativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15dimensional precessingspin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the ...
Binary Black Hole Mergers In The First Advanced Ligo Observing Run, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Binary Black Hole Mergers In The First Advanced Ligo Observing Run, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
The first observational run of the Advanced LIGO detectors, from September 12, 2015 to January 19, 2016, saw the first detections of gravitational waves from binary black hole mergers. In this paper, we present full results from a search for binary black hole merger signals with total masses up to 100M_{⊙} and detailed implications from our observations of these systems. Our search, based on generalrelativistic models of gravitationalwave signals from binary black hole systems, unambiguously identified two signals, GW150914 and GW151226, with a significance of greater than 5σ over the observing period. It also identified a third possible signal, LVT151012 ...
Directly Comparing Gw150914 With Numerical Solutions Of Einstein's Equations For Binary Black Hole Coalescence, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Directly Comparing Gw150914 With Numerical Solutions Of Einstein's Equations For Binary Black Hole Coalescence, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We compare GW150914 directly to simulations of coalescing binary black holes in full general relativity, including several performed specifically to reproduce this event. Our calculations go beyond existing semianalytic models, because for all simulations  including sources with two independent, precessing spins  we perform comparisons which account for all the spinweighted quadrupolar modes, and separately which account for all the quadrupolar and octopolar modes. Consistent with the posterior distributions reported by Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016)] (at the 90% credible level), we find the data are compatible with a wide range of nonprecessing and precessing simulations. Followup ...
Magic Wavelength For The Hydrogen 1s2s Transition: Contribution Of The Continuum And The ReducedMass Correction, Chandra M. Adhikari, A. Kawasaki, Ulrich D. Jentschura
Magic Wavelength For The Hydrogen 1s2s Transition: Contribution Of The Continuum And The ReducedMass Correction, Chandra M. Adhikari, A. Kawasaki, Ulrich D. Jentschura
Physics Faculty Research & Creative Works
Recently, we studied the magic wavelength for the atomic hydrogen 1S2S transition [A. Kawasaki, Phys. Rev. A 92, 042507 (2015)PLRAAN1050294710.1103/PhysRevA.92.042507]. An explicit summation over virtual atomic states of the discrete part of the hydrogen spectrum was performed to evaluate the atomic polarizability. In this paper, we supplement the contribution of the continuum part of the spectrum and add the reducedmass correction. The magic wavelength, at which the lowestorder ac Stark shifts of the 1S and 2S states are equal, is found to be 514.6 nm. The ac Stark shift at the magic wavelength is ...
Comparison Of Experimental And Theoretical Fully Differential Cross Sections For Single Ionization Of The 2s And 2p States Of Li By O⁸⁺ Ions, Ebrahim GhanbariAdivi, Daniel Fischer, Natalia Ferreira, Johannes Goullon, Renate Hubele, Aaron Laforge, Michael Schulz, Don H. Madison
Comparison Of Experimental And Theoretical Fully Differential Cross Sections For Single Ionization Of The 2s And 2p States Of Li By O⁸⁺ Ions, Ebrahim GhanbariAdivi, Daniel Fischer, Natalia Ferreira, Johannes Goullon, Renate Hubele, Aaron Laforge, Michael Schulz, Don H. Madison
Physics Faculty Research & Creative Works
This paper presents a full threedimensional (3D) comparison between experiment and theory for 24 MeV O^{8+} single ionization of the 2s ground state of lithium and the 2p excited state. Two theoretical approximations are examined: the threebody continuum distortedwave (3DW) and threebody continuum distortedwaveeikonal initial state (3DWEIS). Normally, there is a significant difference between these two approaches and the 3DWEIS is in much better agreement with experiment. In this case, there is very little difference between the two approaches and both are in very good agreement with experiment. For the excited 2p state, the 3D cross sections would exhibit ...
Nonresonant TwoPhoton Transitions In Length And Velocity Gauges, Ulrich D. Jentschura
Nonresonant TwoPhoton Transitions In Length And Velocity Gauges, Ulrich D. Jentschura
Physics Faculty Research & Creative Works
We reexamine the invariance of twophoton transition matrix elements and corresponding twophoton Rabi frequencies under the "gauge" transformation from the length to the velocity gauge. It is shown that gauge invariance, in the most general sense, only holds at exact resonance, for both onecolor as well as twocolor absorption. The arguments leading to this conclusion are supported by analytic calculations which express the matrix elements in terms of hypergeometric functions, and ramified by a "master identity" which is fulfilled by offdiagonal matrix elements of the Schrödinger propagator under the transformation from the velocity to the length gauge. The study of ...
Contact Process With Temporal Disorder, Hatem Barghathi, Thomas Vojta, José A. Hoyos
Contact Process With Temporal Disorder, Hatem Barghathi, Thomas Vojta, José A. Hoyos
Physics Faculty Research & Creative Works
We investigate the influence of timevarying environmental noise, i.e., temporal disorder, on the nonequilibrium phase transition of the contact process. Combining a realtime renormalization group, scaling theory, and large scale MonteCarlo simulations in one and two dimensions, we show that the temporal disorder gives rise to an exotic critical point. At criticality, the effective noise amplitude diverges with increasing time scale, and the probability distribution of the density becomes infinitely broad, even on a logarithmic scale. Moreover, the average density and survival probability decay only logarithmically with time. This infinitenoise critical behavior can be understood as the temporal counterpart ...
Comprehensive AllSky Search For Periodic Gravitational Waves In The Sixth Science Run Ligo Data, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Comprehensive AllSky Search For Periodic Gravitational Waves In The Sixth Science Run Ligo Data, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We report on a comprehensive allsky search for periodic gravitational waves in the frequency band 1001500 Hz and with a frequency time derivative in the range of [1.18,+1.00] x 10^{8} Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from the initial LIGO sixth science run and covers a larger parameter space with respect to any past search. A Loosely Coherent detection pipeline was applied to follow up weak outliers in both Gaussian (95% recovery rate) and nonGaussian (75 ...
Control Of Energy Density Inside A Disordered Medium By Coupling To Open Or Closed Channels, Raktim Sarma, Alexey Yamilov, Sasha Petrenko, Yaron Bromberg, Hui Cao
Control Of Energy Density Inside A Disordered Medium By Coupling To Open Or Closed Channels, Raktim Sarma, Alexey Yamilov, Sasha Petrenko, Yaron Bromberg, Hui Cao
Physics Faculty Research & Creative Works
We demonstrate experimentally the efficient control of light intensity distribution inside a random scattering system. The adaptive wave front shaping technique is applied to a silicon waveguide containing scattering nanostructures, and the onchip coupling scheme enables access to all input spatial modes. By selectively coupling the incident light to the open or closed channels of the disordered system, we not only vary the total energy stored inside the system by a factor of 7.4, but also change the energy density distribution from an exponential decay to a linear decay and to a profile peaked near the center. This work ...
Theory Of Noncontact Friction For AtomSurface Interactions, Ulrich D. Jentschura, M. Janke, Maarten F M De Kieviet
Theory Of Noncontact Friction For AtomSurface Interactions, Ulrich D. Jentschura, M. Janke, Maarten F M De Kieviet
Physics Faculty Research & Creative Works
The noncontact (van der Waals) friction is an interesting physical effect, which has been the subject of controversial scientific discussion. The direct friction term due to the thermal fluctuations of the electromagnetic field leads to a friction force proportional to 1/Z^{5} (where Z is the atomwall distance). The backaction friction term takes into account the feedback of thermal fluctuations of the atomic dipole moment onto the motion of the atom and scales as 1/Z^{8}. We investigate noncontact friction effects for the interactions of hydrogen, groundstate helium, and metastable helium atoms with αquartz (SiO_{2}), gold (Au ...
Multiple Fermi Surfaces In Superconducting NbDoped Bi₂Se₃, B. J. Lawson, Paul Corbae, Gang Li, Fan Yu, Tomoya Asaba, Colin Tinsman, Y. Qiu, Julia E. Medvedeva, Yew San Hor, L. Li
Multiple Fermi Surfaces In Superconducting NbDoped Bi₂Se₃, B. J. Lawson, Paul Corbae, Gang Li, Fan Yu, Tomoya Asaba, Colin Tinsman, Y. Qiu, Julia E. Medvedeva, Yew San Hor, L. Li
Physics Faculty Research & Creative Works
Topological insulator Bi_{2}Se_{3} has shown a number of interesting physical properties. Doping Bi_{2}Se_{3} with copper or strontium has been demonstrated to make the material superconducting and potentially even a topological superconductor. The recent discovery of superconducting niobiumdoped Bi_{2}Se_{3} reveals an exciting new physical phenomenon, the coexistence of superconductivity and magnetic ordering, as well as signatures of an oddparity pwave superconducting order. To understand this new phenomenon, a detailed knowledge of the electronic structure is needed. We present an observation of quantum oscillations in the magnetization (the de Haasvan Alphen effect) of ...
Localization And Broadband FollowUp Of The GravitationalWave Transient Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Localization And Broadband FollowUp Of The GravitationalWave Transient Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
A gravitationalwave (GW) transient was identified in data recorded by the Advanced Laser Interferometer Gravitationalwave Observatory (LIGO) detectors on 2015 September 14. The event, initially designated G184098 and later given the name GW150914, is described in detail elsewhere. By prior arrangement, preliminary estimates of the time, significance, and sky location of the event were shared with 63 teams of observers covering radio, optical, nearinfrared, Xray, and gammaray wavelengths with ground and spacebased facilities. In this Letter we describe the lowlatency analysis of the GW data and present the sky localization of the first observed compact binary merger. We summarize the ...
Supplement: "Localization And Broadband FollowUp Of The GravitationalWave Transient Gw150914" (2016, Apjl, 826, L13), Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Supplement: "Localization And Broadband FollowUp Of The GravitationalWave Transient Gw150914" (2016, Apjl, 826, L13), Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
This Supplement provides supporting material for Abbott et al. (2016a). We briefly summarize past electromagnetic (EM) followup efforts as well as the organization and policy of the current EM followup program. We compare the four probability sky maps produced for the gravitationalwave transient GW150914, and provide additional details of the EM followup observations that were performed in the different bands.
Kinematically Complete Study Of LowEnergy ElectronImpact Ionization Of Argon: Internormalized Cross Sections In ThreeDimensional Kinematics, Xueguang Ren, Sadek Amami, Oleg Zatsarinny, Thomas Pflüger, Marvin Weyland, Alexander Dorn, Don H. Madison, Klaus Bartschat
Kinematically Complete Study Of LowEnergy ElectronImpact Ionization Of Argon: Internormalized Cross Sections In ThreeDimensional Kinematics, Xueguang Ren, Sadek Amami, Oleg Zatsarinny, Thomas Pflüger, Marvin Weyland, Alexander Dorn, Don H. Madison, Klaus Bartschat
Physics Faculty Research & Creative Works
As a further test of advanced theoretical methods to describe electronimpact singleionization processes in complex atomic targets, we extended our recent work on Ne(2p) ionization [X. Ren, S. Amami, O. Zatsarinny, T. Pflüger, M. Weyland, W. Y. Baek, H. Rabus, K. Bartschat, D. Madison, and A. Dorn, Phys. Rev. A 91, 032707 (2015)PLRAAN1050294710.1103/PhysRevA.91.032707] to Ar(3p) ionization at the relatively low incident energy of E_{0} = 66 eV. The experimental data were obtained with a reaction microscope, which can cover nearly the entire 4π solid angle for the secondary electron emission. We present experimental ...
Properties Of The Binary Black Hole Merger Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Properties Of The Binary Black Hole Merger Gw150914, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
On September 14, 2015, the Laser Interferometer GravitationalWave Observatory (LIGO) detected a gravitationalwave transient (GW150914); we characterize the properties of the source and its parameters. The data around the time of the event were analyzed coherently across the LIGO network using a suite of accurate waveform models that describe gravitational waves from a compact binary system in general relativity. GW150914 was produced by a nearly equal mass binary black hole of masses 36_{4}^{+5} M_{⊙} and 29_{4}^{+4}M_{⊙}; for each parameter we report the median value and the range of the 90% credible interval. The dimensionless spin ...
Probing And Extracting The Structure Of Vibrating Sf₆ Molecules With InnerShell Photoelectrons, NgocTy Nguyen, R. R. Lucchese, C. D. Lin, AnhThu Le
Probing And Extracting The Structure Of Vibrating Sf₆ Molecules With InnerShell Photoelectrons, NgocTy Nguyen, R. R. Lucchese, C. D. Lin, AnhThu Le
Physics Faculty Research & Creative Works
We propose a scheme for probing the structure of vibrating molecules with photoelectrons generated from ultrashort softxray pulses. As an example we analyze below100eV photoelectrons liberated from the S(2p) orbital of vibrating SF₆ molecules to image very small structural changes of molecular vibration. In particular, photoionization cross sections and photoelectron angular distributions (PAD) at nonequilibrium geometries can be retrieved accurately with photoelectrons near the shape resonance at 13 eV. This is achieved with a pumpprobe scheme, in which the symmetric stretch mode is first Raman excited predominantly by a relatively short laser pulse and then later probed at different ...
Gw151226: Observation Of Gravitational Waves From A 22SolarMass Binary Black Hole Coalescence, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Gw151226: Observation Of Gravitational Waves From A 22SolarMass Binary Black Hole Coalescence, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We report the observation of a gravitationalwave signal produced by the coalescence of two stellarmass black holes. The signal, GW151226, was observed by the twin detectors of the Laser Interferometer GravitationalWave Observatory (LIGO) on December 26, 2015 at 03:38:53 UTC. The signal was initially identified within 70 s by an online matchedfilter search targeting binary coalescences. Subsequent offline analyses recovered GW151226 with a network signaltonoise ratio of 13 and a significance greater than 5σ. The signal persisted in the LIGO frequency band for approximately 1 s, increasing in frequency and amplitude over about 55 cycles from 35 to ...
Comparison Of Experimental And Theoretical Triple Differential Cross Sections For The Single Ionization Of Co₂ (1Πg) By Electron Impact, Zehra N. Ozer, Esam Ali, Mevlut Dogan, Murat Yavuz, Osman Alwan, Adnan Naja, Ochbadrakh Chuluunbaatar, Boghos B. Joulakian, ChuanGang Ning, James Colgan, Don H. Madison
Comparison Of Experimental And Theoretical Triple Differential Cross Sections For The Single Ionization Of Co₂ (1Πg) By Electron Impact, Zehra N. Ozer, Esam Ali, Mevlut Dogan, Murat Yavuz, Osman Alwan, Adnan Naja, Ochbadrakh Chuluunbaatar, Boghos B. Joulakian, ChuanGang Ning, James Colgan, Don H. Madison
Physics Faculty Research & Creative Works
Experimental and theoretical triple differential cross sections for intermediateenergy (250 eV) electronimpact single ionization of the CO_{2} are presented for three fixed projectile scattering angles. Results are presented for ionization of the outermost 1πg molecular orbital of CO_{2} in a coplanar asymmetric geometry. The experimental data are compared to predictions from the threecenter Coulomb continuum approximation for triatomic targets, and the molecular threebody distorted wave (M3DW) model. It is observed that while both theories are in reasonable qualitative agreement with experiment, the M3DW is in the best overall agreement with experiment.
Experimental And Theoretical TripleDifferential Cross Sections For Tetrahydrofuran Ionized By LowEnergy 26EvElectron Impact, Esam Ali, Xueguang Ren, Alexander Dorn, Chuangang Ning, James Colgan, Don H. Madison
Experimental And Theoretical TripleDifferential Cross Sections For Tetrahydrofuran Ionized By LowEnergy 26EvElectron Impact, Esam Ali, Xueguang Ren, Alexander Dorn, Chuangang Ning, James Colgan, Don H. Madison
Physics Faculty Research & Creative Works
We report an experimental and theoretical study of lowenergy electronimpact ionization of tetrahydrofuran, which is a molecule of biological interest. The experiments were performed using an advanced reaction microscope specially built for electronimpact ionization studies. The theoretical calculations were performed within the molecular threebody distortedwave model. Reasonably good agreement is found between experiment and theory.
Reply To "Comment On 'Classical Description Of H(1s) And H* (N=2) For CrossSection Calculations Relevant To ChargeExchange Diagnostics'", N. D. Cariatore, Sebastian Otranto, Ronald E. Olson
Reply To "Comment On 'Classical Description Of H(1s) And H* (N=2) For CrossSection Calculations Relevant To ChargeExchange Diagnostics'", N. D. Cariatore, Sebastian Otranto, Ronald E. Olson
Physics Faculty Research & Creative Works
In reply to the Comment of Jorge et al. [Phys. Rev. A 93, 066701 (2016)], we agree and reconfirm that the alternative classical trajectory Monte Carlo method (called hydrogenicZCTMC) radial distributions for H*(n = 2) we recently published are not stable in time. However, we show that such lack of stability which is more noticeable for H(2s) than for H(2p) is due to the initialization procedure employed and not to the hydrogenicZCTMC method itself. A new set of completely stable hydrogenicZCTMC calculations for H*(n = 2) is introduced and found in very good agreement with standard microcanonical results ...
Influence Of Orbital Symmetry On Diffraction Imaging With Rescattering Electron Wave Packets, Michael G. Pullen, Benjamin Wolter, AnhThu Le, Matthias Baudisch, Michele Sclafani, Hugo Pires, Claus Dieter Schroeter, Joachim Ullrich, Robert Moshammer, Thomas Pfeifer, C. D. Lin, Jens Biegert
Influence Of Orbital Symmetry On Diffraction Imaging With Rescattering Electron Wave Packets, Michael G. Pullen, Benjamin Wolter, AnhThu Le, Matthias Baudisch, Michele Sclafani, Hugo Pires, Claus Dieter Schroeter, Joachim Ullrich, Robert Moshammer, Thomas Pfeifer, C. D. Lin, Jens Biegert
Physics Faculty Research & Creative Works
The ability to directly follow and timeresolve the rearrangement of the nuclei within molecules is a frontier of science that requires atomic spatial and fewfemtosecond temporal resolutions. While laserinduced electron diffraction can meet these requirements, it was recently concluded that molecules with particular orbital symmetries (such as π_{g}) cannot be imaged using purely backscattering electron wave packets without molecular alignment. Here, we demonstrate, in direct contradiction to these findings, that the orientation and shape of molecular orbitals presents no impediment for retrieving molecular structure with adequate sampling of the momentum transfer space. We overcome previous issues by showcasing retrieval ...
Gw150914: First Results From The Search For Binary Black Hole Coalescence With Advanced Ligo, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Gw150914: First Results From The Search For Binary Black Hole Coalescence With Advanced Ligo, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
On September 14, 2015, at 09:50:45 UTC the two detectors of the Laser Interferometer GravitationalWave Observatory (LIGO) simultaneously observed the binary black hole merger GW150914. We report the results of a matchedfilter search using relativistic models of compactobject binaries that recovered GW150914 as the most significant event during the coincident observations between the two LIGO detectors from September 12 to October 20, 2015 GW150914 was observed with a matchedfilter signaltonoise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203000 years, equivalent to a significance greater than 5.1 σ.
HighEnergy Neutrino FollowUp Search Of Gravitational Wave Event Gw150914 With Antares And Icecube, S. AdrianMartinez, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
HighEnergy Neutrino FollowUp Search Of Gravitational Wave Event Gw150914 With Antares And Icecube, S. AdrianMartinez, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We present the highenergyneutrino followup observations of the first gravitational wave transient GW150914 observed by the Advanced LIGO detectors on September 14, 2015. We search for coincident neutrino candidates within the data recorded by the IceCube and Antares neutrino detectors. A possible joint detection could be used in targeted electromagnetic followup observations, given the significantly better angular resolution of neutrino events compared to gravitational waves. We find no neutrino candidates in both temporal and spatial coincidence with the gravitational wave event. Within ±500 s of the gravitational wave event, the number of neutrino candidates detected by IceCube and Antares were ...
Search For Transient Gravitational Waves In Coincidence With ShortDuration Radio Transients During 20072013, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Search For Transient Gravitational Waves In Coincidence With ShortDuration Radio Transients During 20072013, Benjamin P. Abbott, Marco Cavaglia, For Full List Of Authors, See Publisher's Website.
Physics Faculty Research & Creative Works
We present an archival search for transient gravitationalwave bursts in coincidence with 27 singlepulse triggers from Green Bank Telescope pulsar surveys, using the LIGO, Virgo, and GEO interferometer network. We also discuss a check for gravitationalwave signals in coincidence with Parkes fast radio bursts using similar methods. Data analyzed in these searches were collected between 2007 and 2013. Possible sources of emission of both shortduration radio signals and transient gravitationalwave emission include starquakes on neutron stars, binary coalescence of neutron stars, and cosmic string cusps. While no evidence for gravitationalwave emission in coincidence with these radio transients was found, the ...