Physical Sciences and Mathematics | Open Access Articles

A Local Leaky-Box Model For The Local Stellar Surface Density-Gas Surface Density-Gas Phase Metallicity Relation, Guangtun Ben Zhu, Jorge K. Barrera-Ballesteros, Timothy M. Heckman, Nadia L. Zakamska, Sebastian F. Sánchez, Renbin Yan, Jonathan Brinkman Mar 2017

First Measurement Of Unpolarized Semi-Inclusive Deep-Inelastic Scattering Cross Sections From A ³He Target, X. Yan, K. Allada, K. Aniol, J. R. M. Annand, T. Averett, F. Benmokhtar, W. Bertozzi, P. C. Bradshaw, P. Bosted, A. Camsonne, M. Canan, G. D. Cates, C. Chen, J. -P. Chen, W. Chen, K. Chirapatpimol, E. Chudakov, E. Cisbani, J. C. Cornejo, F. Cusanno, M. M. Dalton, W. Deconinck, C. W. De Jager, R. De Leo, X. Deng, A. Deur, H. Ding, P. A. M. Dolph, C. Dutta, D. Dutta, A. Kolarkar, Wolfgang Korsch Mar 2017

Target And Beam-Target Spin Asymmetries In Exclusive Pion Electroproduction For Q² > 1 Gev². Ii. Ep → Eπ⁰P, P. E. Bosted, A. Kim, K. P. Adhikari, D. Adikaram, Z. Akbar, M. J. Amaryan, S. Anefalos Pereira, H. Avakian, R. A. Badui, J. Ball, I. Balossino, M. Battaglieri, I. Bedlinskiy, A. S. Biselli, S. Boiarinov, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, T. Cao, D. S. Carman, A. Celentano, S. Chandavar, G. Charles, T. Chetry, G. Ciullo, L. Clark, L. Colaneri, P. L. Cole, M. Contalbrigo, Wesley P. Gohn Mar 2017

Which Stars Are Ionizing The Orion Nebula?, C. R. O'Dell, W. Kollatschny, Gary J. Ferland Mar 2017

Elliptic Flow Of Electrons From Heavy-Flavor Hadron Decays In Au + Au Collisions At √^S_Nn = 200, 62.4, And 39 Gev, L. Adamczyk, J. Kevin Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, A. Behera, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, Renee H. Fatemi, Suvarna Ramachandran Mar 2017

Space Telescope And Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign And Emission-Line Analysis For Ngc 5548, L. Pei, M. M. Fausnaugh, A. J. Barth, B. M. Peterson, M. C. Bentz, G. De Rosa, K. D. Denney, M. R. Goad, C. S. Kochanek, K. T. Korista, G. A. Kriss, R. W. Pogge, V. N. Bennert, M. Brotherton, K. I. Clubb, E. Dalla Bontà, A. V. Filippenko, J. E. Greene, C. J. Grier, M. Vestergaard, W. Zheng, Scott M. Adams, Thomas G. Beatty, A. Bigley, Jacob E. Brown, Jonathan S. Brown, G. Canalizo, J. M. Comerford, Carl T. Coker, E. M. Corsini, Gary J. Ferland, S. A. Klimanov Mar 2017

Space Telescope And Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign And Emission-Line Analysis For Ngc 5548, L. Pei, M. M. Fausnaugh, A. J. Barth, B. M. Peterson, M. C. Bentz, G. De Rosa, K. D. Denney, M. R. Goad, C. S. Kochanek, K. T. Korista, G. A. Kriss, R. W. Pogge, V. N. Bennert, M. Brotherton, K. I. Clubb, E. Dalla Bontà, A. V. Filippenko, J. E. Greene, C. J. Grier, M. Vestergaard, W. Zheng, Scott M. Adams, Thomas G. Beatty, A. Bigley, Jacob E. Brown, Jonathan S. Brown, G. Canalizo, J. M. Comerford, Carl T. Coker, E. M. Corsini, Gary J. Ferland, S. A. Klimanov

Physics and Astronomy Faculty Publications

We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multiwavelength reverberation mapping campaign. The campaign spanned 6 months and achieved an almost daily cadence with observations from five ground-based telescopes. The Hβ and He ii λ4686 broad emission-line light curves lag that of the 5100 Å optical continuum by 4.17^+0.36 _-0.36 days and 0.79^+0.35_-0.34 days respectively. The Hβ lag relative to the 1158 Å ultraviolet continuum light curve measured by the Hubble Space Telescope is ~50% longer than that measured against the optical continuum, and …

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Glue Spin And Helicity In The Proton From Lattice Qcd, Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, Yong Zhao Mar 2017

Glue Spin And Helicity In The Proton From Lattice Qcd, Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, Yong Zhao

Physics and Astronomy Faculty Publications

We report the first lattice QCD calculation of the glue spin in the nucleon. The lattice calculation is carried out with valence overlap fermions on 2 + 1 flavor domain-wall fermion gauge configurations on four lattice spacings and four volumes including an ensemble with physical values for the quark masses. The glue spin SG in the Coulomb gauge in the modified minimal subtraction (MS¯) scheme is obtained with one-loop perturbative matching. We find the results fairly insensitive to lattice spacing and quark masses. We also find that the proton momentum dependence of S_G in the range 0 ≤ |p …

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The Impact Of Base Stacking On The Conformations And Electrostatics Of Single-Stranded Dna, Alex Plumridge, Steve P. Meisburger, Kurt Andresen, Lois Pollack Feb 2017

The Impact Of Base Stacking On The Conformations And Electrostatics Of Single-Stranded Dna, Alex Plumridge, Steve P. Meisburger, Kurt Andresen, Lois Pollack

Physics and Astronomy Faculty Publications

Single-stranded DNA (ssDNA) is notable for its interactions with ssDNA binding proteins (SSBs) during fundamentally important biological processes including DNA repair and replication. Previous work has begun to characterize the conformational and electrostatic properties of ssDNA in association with SSBs. However, the conformational distributions of free ssDNA have been difficult to determine. To capture the vast array of ssDNA conformations in solution, we pair small angle X-ray scattering with novel ensemble fitting methods, obtaining key parameters such as the size, shape and stacking character of strands with different sequences. Complementary ion counting measurements using inductively coupled plasma atomic emission spectroscopy …

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Particle Physics Model For The 17 Mev Anomaly In Beryllium Nuclear Decays, Jonathan L. Feng, Bartosz Fornal, Iftah Galon, Susan Gardner, Jordan Smolinsky, Tim M. P. Tait, Philip Tanedo Feb 2017

Particle Physics Model For The 17 Mev Anomaly In Beryllium Nuclear Decays, Jonathan L. Feng, Bartosz Fornal, Iftah Galon, Susan Gardner, Jordan Smolinsky, Tim M. P. Tait, Philip Tanedo

Physics and Astronomy Faculty Publications

The 6.8σ anomaly in excited ⁸Be nuclear decays via internal pair creation is fit well by a new particle interpretation. In a previous analysis, we showed that a 17 MeV protophobic gauge boson provides a particle physics explanation of the anomaly consistent with all existing constraints. Here we begin with a review of the physics of internal pair creation in ⁸Be decays and the characteristics of the observed anomaly. To develop its particle interpretation, we provide an effective operator analysis for excited ⁸Be decays to particles with a variety of spins and parities and show that …

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Predicted Electronic Markers For Polytypes Of Laobis₂ Examined Via Angle-Resolved Photoemission Spectroscopy, Xiaoqing Zhou, Qihang Liu, J. A. Waugh, T. Nummy, Xiuwen Zhang, Xiangde Zhu, Gang Cao, Alex Zunger, D. S. Dessau Feb 2017

Predicted Electronic Markers For Polytypes Of Laobis2 Examined Via Angle-Resolved Photoemission Spectroscopy, Xiaoqing Zhou, Qihang Liu, J. A. Waugh, T. Nummy, Xiuwen Zhang, Xiangde Zhu, Gang Cao, Alex Zunger, D. S. Dessau

Physics and Astronomy Faculty Publications

The natural periodic stacking of symmetry-inequivalent planes in layered compounds can lead to the formation of natural superlattices; albeit close in total energy, (thus in their thermodynamic stability), such polytype superlattices can exhibit different structural symmetries, thus have markedly different electronic properties which can in turn be used as “structural markers”. We illustrate this general principle on the layered LaOBiS₂ compound where density-functional theory (DFT) calculations on the (BiS₂)/(LaO)/(BiS₂) polytype superlattices reveal both qualitatively and quantitatively distinct electronic structure markers associated with the Rashba physics, yet the total energies are only ∼ 0.1 meV apart. …

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The Jcmt Nearby Galaxies Legacy Survey – Xi. Environmental Variations In The Atomic And Molecular Gas Radial Profiles Of Nearby Galaxies, Angus Mok, C. D. Wilson, J. H. Knapen, José R. Sánchez-Gallego, E. Brinks, E. Rosolowsky Feb 2017

The Jcmt Nearby Galaxies Legacy Survey – Xi. Environmental Variations In The Atomic And Molecular Gas Radial Profiles Of Nearby Galaxies, Angus Mok, C. D. Wilson, J. H. Knapen, José R. Sánchez-Gallego, E. Brinks, E. Rosolowsky

Physics and Astronomy Faculty Publications

We present an analysis of the radial profiles of a sample of 43 H I-flux selected spiral galaxies from the Nearby Galaxies Legacy Survey (NGLS) with resolved James Clerk Maxwell Telescope (JCMT) CO J = 3 − 2 and/or Very Large Array (VLA) H I maps. Comparing the Virgo and non-Virgo populations, we confirm that the H i discs are truncated in the Virgo sample, even for these relatively H i-rich galaxies. On the other hand, the H₂ distribution is enhanced for the Virgo galaxies near their centres, resulting in higher H₂ to H I ratios and steeper …

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The Dusty Tori Of Nearby Qsos As Constrained By High-Resolution Mid-Ir Observations, M. Martínez-Paredes, I. Aretxaga, A. Alonso-Herrero, O. González-Martín, E. Lopéz-Rodríguez, C. Ramos Almeida, A. Asensio Ramos, T. Diaz Santos, Moshe Elitzur, P. Esquej, A. Hernán-Caballero, K. Ichikawa, R. Nikutta, C. Packham, M. Pereira-Santaella, C. Telesco Feb 2017

The Dusty Tori Of Nearby Qsos As Constrained By High-Resolution Mid-Ir Observations, M. Martínez-Paredes, I. Aretxaga, A. Alonso-Herrero, O. González-Martín, E. Lopéz-Rodríguez, C. Ramos Almeida, A. Asensio Ramos, T. Diaz Santos, Moshe Elitzur, P. Esquej, A. Hernán-Caballero, K. Ichikawa, R. Nikutta, C. Packham, M. Pereira-Santaella, C. Telesco

Physics and Astronomy Faculty Publications

We present mid-infrared (MIR; 7.5–13.5 μm) imaging and spectroscopy observations obtained with the CanariCam (CC) instrument on the 10.4-m Gran Telescopio CANARIAS for a sample of 20 nearby, MIR bright and X-ray luminous quasi-stellar objects (QSOs). We find that for the majority of QSOs the MIR emission is unresolved at angular scales ∼0.3 arcsec, corresponding to physical scales ≲ 600 pc. We find that the higher-spatial resolution CC spectra have similar shapes to those obtained with Spitzer/IRS, and hence we can assume that the spectra are not heavily contaminated by extended emission in the host galaxy. We thus take …

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Testing Atomic Collision Theory With The Two-Photon Continuum Of Astrophysical Nebulae, Francisco Guzmán, N. R. Badnell, Marios Chatzikos, P. A. M. Van Hoof, R. J. R. Williams, Gary J. Ferland Feb 2017

Testing Atomic Collision Theory With The Two-Photon Continuum Of Astrophysical Nebulae, Francisco Guzmán, N. R. Badnell, Marios Chatzikos, P. A. M. Van Hoof, R. J. R. Williams, Gary J. Ferland

Physics and Astronomy Faculty Publications

Accurate rates for energy-degenerate l-changing collisions are needed to determine cosmological abundances and recombination. There are now several competing theories for the treatment of this process, and it is not possible to test these experimentally. We show that the H i two-photon continuum produced by astrophysical nebulae is strongly affected by l-changing collisions. We perform an analysis of the different underlying atomic processes and simulate the recombination and two-photon spectrum of a nebula containing H and He. We provide an extended set of effective recombination coefficients and updated l-changing 2s − 2p transition rates using …

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Structure And Physical Properties Of Srniru₅O₁₁ Single Crystals: An R-Type Ferrite Based On Ordered Kagome Nets, L. Shlyk, Lance E. De Long, R. Niewa Jan 2017

Structure And Physical Properties Of Srniru5O11 Single Crystals: An R-Type Ferrite Based On Ordered Kagome Nets, L. Shlyk, Lance E. De Long, R. Niewa

Physics and Astronomy Faculty Publications

Single crystals of the R-type ferrite SrNiRu₅O₁₁ were grown from a chloride flux. The hexagonal crystal structure contains ruthenium located on distorted kagome nets. The low-temperature dc magnetic susceptibilities (χ_⊥ and χ_∥, perpendicular and parallel to the c axis, respectively) diverge as T^−0.3, and do not exhibit any indication of long-range magnetic order down to 4.5 K. The electrical resistivity varies as T^1.6 below 40 K, which is typical of non-Fermi liquids, and may originate from a competition between residual magnetic interactions among Ni²⁺ (S = 1) spins …

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Locality And Efficient Evaluation Of Lattice Composite Fields: Overlap-Based Gauge Operators, Andrei Alexandru, Ivan Horváth Jan 2017

Locality And Efficient Evaluation Of Lattice Composite Fields: Overlap-Based Gauge Operators, Andrei Alexandru, Ivan Horváth

Physics and Astronomy Faculty Publications

We propose a novel general approach to locality of lattice composite fields, which in case of QCD involves locality in both quark and gauge degrees of freedom. The method is applied to gauge operators based on the overlap Dirac matrix elements, showing for the first time their local nature on realistic path-integral backgrounds. The framework entails a method for efficient evaluation of such nonultralocal operators, whose computational cost is volume independent at fixed accuracy, and only grows logarithmically as this accuracy approaches zero. This makes computation of useful operators, such as overlap-based topological density, practical. The key notion underlying these …

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Strange Quark Magnetic Moment Of The Nucleon At The Physical Point, Raza Sabbir Sufian, Yi-Bo Yang, Andrei Alexandru, Terrence Draper, Jian Liang, Keh-Fei Liu Jan 2017

Strange Quark Magnetic Moment Of The Nucleon At The Physical Point, Raza Sabbir Sufian, Yi-Bo Yang, Andrei Alexandru, Terrence Draper, Jian Liang, Keh-Fei Liu

Physics and Astronomy Faculty Publications

We report a lattice QCD calculation of the strange quark contribution to the nucleon’s magnetic moment and charge radius. This analysis presents the first direct determination of strange electromagnetic form factors including at the physical pion mass. We perform a model-independent extraction of the strange magnetic moment and the strange charge radius from the electromagnetic form factors in the momentum transfer range of 0.051 GeV² ≲ Q² ≲ 1.31 GeV². The finite lattice spacing and finite volume corrections are included in a global fit with 24 valence quark masses on four lattices with different lattice spacings, …

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Nuclear Structure Of ⁷⁶Ge From Inelastic Neutron Scattering Measurements And Shell Model Calculations, Sharmistha Mukhopadhyay, Benjamin P. Crider, B. A. Brown, S. F. Ashley, Anagha Chakraborty, A. Kumar, Marcus T. Mcellistrem, Erin E. Peters, Francisco M. Prados-Estévez, Steven W. Yates Jan 2017

Nuclear Structure Of 76Ge From Inelastic Neutron Scattering Measurements And Shell Model Calculations, Sharmistha Mukhopadhyay, Benjamin P. Crider, B. A. Brown, S. F. Ashley, Anagha Chakraborty, A. Kumar, Marcus T. Mcellistrem, Erin E. Peters, Francisco M. Prados-Estévez, Steven W. Yates

Physics and Astronomy Faculty Publications

The low-lying, low-spin levels of ⁷⁶Ge were studied with the (n,n′γ) reaction. Gamma-ray excitation function measurements were performed at incident neutron energies from 1.6 to 3.7 MeV, and γ-ray angular distributions were measured at neutron energies of 3.0 and 3.5 MeV. From these measurements, level spins, level lifetimes, γ-ray intensities, and multipole mixing ratios were determined. No evidence for a number of previously placed levels was found. Below 3.3 MeV, many new levels were identified, and the level scheme was re-evaluated. The B(E2) values support low-lying band structure. The 2 …

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Relaxation Of Charge In Monolayer Graphene: Fast Nonlinear Diffusion Versus Coulomb Effects, Eugene B. Kolomeisky, Joseph P. Straley Jan 2017

Relaxation Of Charge In Monolayer Graphene: Fast Nonlinear Diffusion Versus Coulomb Effects, Eugene B. Kolomeisky, Joseph P. Straley

Physics and Astronomy Faculty Publications

Pristine monolayer graphene exhibits very poor screening because the density of states vanishes at the Dirac point. As a result, charge relaxation is controlled by the effects of zero-point motion (rather than by the Coulomb interaction) over a wide range of parameters. Combined with the fact that graphene possesses finite intrinsic conductivity, this leads to a regime of relaxation described by a nonlinear diffusion equation with a diffusion coefficient that diverges at zero charge density. Some consequences of this fast diffusion are self-similar superdiffusive regimes of relaxation, the development of a charge depleted region at the interface between electron- and …

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Doping Evolution Of Magnetic Order And Magnetic Excitations In (Sr_1-XLa_X)₃Ir₂O₇, Xingye Lu, D. E. Mcnally, M. Moretti Sala, Jsaminka Terzic, M. H. Upton, D. Casa, G. Ingold, Gang Cao, T. Schmitt Jan 2017

Doping Evolution Of Magnetic Order And Magnetic Excitations In (Sr1-XLaX)3Ir2O7, Xingye Lu, D. E. Mcnally, M. Moretti Sala, Jsaminka Terzic, M. H. Upton, D. Casa, G. Ingold, Gang Cao, T. Schmitt

Physics and Astronomy Faculty Publications

We use resonant elastic and inelastic x-ray scattering at the Ir-L₃ edge to study the doping-dependent magnetic order, magnetic excitations, and spin-orbit excitons in the electron-doped bilayer iridate (Sr_1−xLa_x)₃Ir₂O₇ (0 ≤ x ≤ 0.065). With increasing doping x, the three-dimensional long range antiferromagnetic order is gradually suppressed and evolves into a three-dimensional short range order across the insulator-to-metal transition from x = 0 to 0.05, followed by a transition to two-dimensional short range order between x = 0.05 and 0.065. Because of the interactions between the J …

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Design And Performance Of Sipm-Based Readout Of Pbf₂ Crystals For High-Rate, Precision Timing Applications, J. Kaspar, A. T. Fienberg, D. W. Hertzog, M. A. Huehn, P. Kammel, K. S. Khaw, D. A. Peterson, M. W. Smith, T. D. Vanwechel, A. Chapelain, L. K. Gibbons, D. A. Sweigart, C. Ferrari, A. Fioretti, C. Gabbanini, G. Venanzoni, M. Iacovacci, S. Mastroianni, K. Giovanetti, W. Gohn, Tim Gorringe, D. Pocanic Jan 2017

Design And Performance Of Sipm-Based Readout Of Pbf2 Crystals For High-Rate, Precision Timing Applications, J. Kaspar, A. T. Fienberg, D. W. Hertzog, M. A. Huehn, P. Kammel, K. S. Khaw, D. A. Peterson, M. W. Smith, T. D. Vanwechel, A. Chapelain, L. K. Gibbons, D. A. Sweigart, C. Ferrari, A. Fioretti, C. Gabbanini, G. Venanzoni, M. Iacovacci, S. Mastroianni, K. Giovanetti, W. Gohn, Tim Gorringe, D. Pocanic

Physics and Astronomy Faculty Publications

We have developed a custom amplifier board coupled to a large-format 16-channel Hamamatsu silicon photomultiplier device for use as the light sensor for the electromagnetic calorimeters in the Muon g - 2 experiment at Fermilab. The calorimeter absorber is an array of lead-fluoride crystals, which produces short-duration Cherenkov light. The detector sits in the high magnetic field of the muon storage ring. The SiPMs selected, and their accompanying custom electronics, must preserve the short pulse shape, have high quantum efficiency, be non-magnetic, exhibit gain stability under varying rate conditions, and cover a fairly large fraction of the crystal exit surface …

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Charge-Dependent Directed Flow In Cu + Au Collisions At √S_Nn = 200 Gev, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, I. Bunzarov, J. Butterworth, H. Caines, Renee H. Fatemi, Suvarna Ramachandran Jan 2017

Charge-Dependent Directed Flow In Cu + Au Collisions At √SNn = 200 Gev, L. Adamczyk, James K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, R. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. Bielcik, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, I. Bunzarov, J. Butterworth, H. Caines, Renee H. Fatemi, Suvarna Ramachandran

Physics and Astronomy Faculty Publications

We present the first measurement of charge-dependent directed flow in Cu + Au collisions at √s_NN = 200 GeV. The results are presented as a function of the particle transverse momentum and pseudorapidity for different centralities. A finite difference between the directed flow of positive and negative charged particles is observed that qualitatively agrees with the expectations from the effects of the initial strong electric field between two colliding ions with different nuclear charges. The measured difference in directed flow is much smaller than that obtained from the parton-hadron-string-dynamics model, which suggests that most of the electric charges, …

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Neutron Decay Correlations In The Nab Experiment, L. J. Broussard, R. Alarcon, S. Baeßler, L. Barrón Palos, N. Birge, T. Bode, J. D. Bowman, T. Brunst, J. R. Calarco, J. Caylor, T. Chupp, V. Cianciolo, Christopher Crawford, G. W. Dodson, J. Dubois, W. Fan, W. Farrar, N. Fomin, E. Frlež, J. Fry, M. T. Gericke, F. Glück, G. L. Greene, R. K. Grzywacz, V. Gudkov, C. Hendrus, F. W. Hersman, T. Ito, H. Li, N. Macsai, Bradley R. Plaster, Aaron P. Sprow Jan 2017

Neutron Decay Correlations In The Nab Experiment, L. J. Broussard, R. Alarcon, S. Baeßler, L. Barrón Palos, N. Birge, T. Bode, J. D. Bowman, T. Brunst, J. R. Calarco, J. Caylor, T. Chupp, V. Cianciolo, Christopher Crawford, G. W. Dodson, J. Dubois, W. Fan, W. Farrar, N. Fomin, E. Frlež, J. Fry, M. T. Gericke, F. Glück, G. L. Greene, R. K. Grzywacz, V. Gudkov, C. Hendrus, F. W. Hersman, T. Ito, H. Li, N. Macsai, Bradley R. Plaster, Aaron P. Sprow

Physics and Astronomy Faculty Publications

The Nab experiment will measure the correlation a between the momenta of the beta particle and antineutrino in neutron decay as well as the Fierz term b which distorts the beta spectrum.

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Research At The University Of Kentucky Accelerator Laboratory, S. F. Hicks, Michael A. Kovash Jan 2017

Research At The University Of Kentucky Accelerator Laboratory, S. F. Hicks, Michael A. Kovash

Physics and Astronomy Faculty Publications

The Department of Physics and Astronomy at the University of Kentucky operates a 7-MV CN Van de Graaff accelerator that produces primary beams of protons, deuterons, and helium ions. An in-terminal pulsing and bunching system operates at 1.875 MHz and is capable of providing 1 ns beam bunches at an average current of several microamperes. Nearly all ongoing research programs involve secondary pulsed neutrons produced with gas cells containing deuterium or tritium, as well as with a variety of solid targets. Most experiments are performed at a target station positioned over a deep pit, so as to reduce the background …

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On Marie Curie And Me, Sharon L. Stephenson Jan 2017

On Marie Curie And Me, Sharon L. Stephenson

Physics and Astronomy Faculty Publications

When people discover I am a nuclear physicist, they often say, "Oh, like Marie Curie!" And yes, I am like Marie in that I have woman parts, I study nuclei, I have two children and a physicist husband. But had I lived in her time, I would not have been that rare female admitted to the Sorbonne. I could not have quietly made the top scores on the math and physics examinations. I am impulsive and thin-skinned, my occasional cleverness passing for deeper talent. I would probably have been a cleaning girl, pregnant at 15, unable to speak any language …

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Full-Text Articles in Physical Sciences and Mathematics

A Local Leaky-Box Model For The Local Stellar Surface Density-Gas Surface Density-Gas Phase Metallicity Relation, Guangtun Ben Zhu, Jorge K. Barrera-Ballesteros, Timothy M. Heckman, Nadia L. Zakamska, Sebastian F. Sánchez, Renbin Yan, Jonathan Brinkman

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Which Stars Are Ionizing The Orion Nebula?, C. R. O'Dell, W. Kollatschny, Gary J. Ferland

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Glue Spin And Helicity In The Proton From Lattice Qcd, Yi-Bo Yang, Raza Sabbir Sufian, Andrei Alexandru, Terrence Draper, Michael J. Glatzmaier, Keh-Fei Liu, Yong Zhao

Physics and Astronomy Faculty Publications

The Impact Of Base Stacking On The Conformations And Electrostatics Of Single-Stranded Dna, Alex Plumridge, Steve P. Meisburger, Kurt Andresen, Lois Pollack

Physics and Astronomy Faculty Publications

Particle Physics Model For The 17 Mev Anomaly In Beryllium Nuclear Decays, Jonathan L. Feng, Bartosz Fornal, Iftah Galon, Susan Gardner, Jordan Smolinsky, Tim M. P. Tait, Philip Tanedo

Physics and Astronomy Faculty Publications

Predicted Electronic Markers For Polytypes Of Laobis2 Examined Via Angle-Resolved Photoemission Spectroscopy, Xiaoqing Zhou, Qihang Liu, J. A. Waugh, T. Nummy, Xiuwen Zhang, Xiangde Zhu, Gang Cao, Alex Zunger, D. S. Dessau

Physics and Astronomy Faculty Publications

The Jcmt Nearby Galaxies Legacy Survey – Xi. Environmental Variations In The Atomic And Molecular Gas Radial Profiles Of Nearby Galaxies, Angus Mok, C. D. Wilson, J. H. Knapen, José R. Sánchez-Gallego, E. Brinks, E. Rosolowsky

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Testing Atomic Collision Theory With The Two-Photon Continuum Of Astrophysical Nebulae, Francisco Guzmán, N. R. Badnell, Marios Chatzikos, P. A. M. Van Hoof, R. J. R. Williams, Gary J. Ferland

Physics and Astronomy Faculty Publications

Structure And Physical Properties Of Srniru5O11 Single Crystals: An R-Type Ferrite Based On Ordered Kagome Nets, L. Shlyk, Lance E. De Long, R. Niewa

Physics and Astronomy Faculty Publications

Locality And Efficient Evaluation Of Lattice Composite Fields: Overlap-Based Gauge Operators, Andrei Alexandru, Ivan Horváth

Physics and Astronomy Faculty Publications

Strange Quark Magnetic Moment Of The Nucleon At The Physical Point, Raza Sabbir Sufian, Yi-Bo Yang, Andrei Alexandru, Terrence Draper, Jian Liang, Keh-Fei Liu

Physics and Astronomy Faculty Publications

Nuclear Structure Of 76Ge From Inelastic Neutron Scattering Measurements And Shell Model Calculations, Sharmistha Mukhopadhyay, Benjamin P. Crider, B. A. Brown, S. F. Ashley, Anagha Chakraborty, A. Kumar, Marcus T. Mcellistrem, Erin E. Peters, Francisco M. Prados-Estévez, Steven W. Yates

Physics and Astronomy Faculty Publications

Relaxation Of Charge In Monolayer Graphene: Fast Nonlinear Diffusion Versus Coulomb Effects, Eugene B. Kolomeisky, Joseph P. Straley

Physics and Astronomy Faculty Publications

Doping Evolution Of Magnetic Order And Magnetic Excitations In (Sr1-XLaX)3Ir2O7, Xingye Lu, D. E. Mcnally, M. Moretti Sala, Jsaminka Terzic, M. H. Upton, D. Casa, G. Ingold, Gang Cao, T. Schmitt

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Physics and Astronomy Faculty Publications

Research At The University Of Kentucky Accelerator Laboratory, S. F. Hicks, Michael A. Kovash

Physics and Astronomy Faculty Publications

On Marie Curie And Me, Sharon L. Stephenson

Physics and Astronomy Faculty Publications