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Articles 1 - 16 of 16
Full-Text Articles in Physics
Lab Without A Lab: Prospects For An Iolab Kit To Provide Hands-On Introductory Physics Laboratory Learning Experiences Outside The Traditional Setting, Seth T. Ashman
Engineering & Physics Faculty Publications
No abstract provided.
Vibrational State Resolved Lifetimes Of The Na2 21Σ+U Double Well State, Seth T. Ashman, Lutz Huwel, Roy Anunciado, Nadeepa Jayasundara
Vibrational State Resolved Lifetimes Of The Na2 21Σ+U Double Well State, Seth T. Ashman, Lutz Huwel, Roy Anunciado, Nadeepa Jayasundara
Engineering & Physics Faculty Publications
Lifetimes of individual Na2 ro-vibrational levels of the 21Σ + u double well-state have been measured using a delayed photoionization technique. Ground state Na2 produced in a molecular beam is excited resonantly by the doubled output of a pulsed dye laser in the range 333 – 357 nm and then ionized by a 532 nm photon from a time-delayed Nd:YAG laser. By appropriate excitation laser tuning and systematic variation of the probe laser delay, ro-vibrational level resolved lifetimes are obtained for v=25- 49. The double well state lifetime values are found to decrease from about 50 ns at v=25 to …
Comparison Of Absorption, Fluorescence, And Polarization Spectroscopy Of Atomic Rubidium, Seth T. Ashman, Cayla Stifler, Joaquin Romero
Comparison Of Absorption, Fluorescence, And Polarization Spectroscopy Of Atomic Rubidium, Seth T. Ashman, Cayla Stifler, Joaquin Romero
Engineering & Physics Faculty Publications
An ongoing spectroscopic investigation of atomic rubidium utilizes a two-photon, single-laser excitation process. Transitions accessible with our tunable laser include 5P1/2 (F ′ ) ← 5S1/2 (F) and 5P3/2 (F ′ ) ← 5S1/2 (F). The laser is split into a pump and probe beam to allow for Doppler-free measurements of transitions between hyperfine levels. The pump and probe beams are overlapped in a counter-propagating geometry and the laser frequency scans over a transition. Absorption, fluorescence and polarization spectroscopy techniques are applied to this basic experimental setup. The temperature of the vapor cell and the power of the pump and …
Transubstantiation And Quantum Physics: The Parallels Of Mystery In Religion And Science, Zachary Sexton
Transubstantiation And Quantum Physics: The Parallels Of Mystery In Religion And Science, Zachary Sexton
Spring 2013, Science and Religion
As the study of physics has progressed into the abstract realm of quanta, some have argued that the notion of transubstantiation is an unreasonable understanding of the Eucharist. However, when confronted with the uncertainty that modern physics presents, sharp parallels between this uncertainty and the metaphysical mysteries of transubstantiation. If it is reasonable to accept uncertainty in quantum physics, then it should be reasonable to accept the mysteries within the metaphysical world.
Heisenberg’S Uncertainty Principle, Matthew Santos
Heisenberg’S Uncertainty Principle, Matthew Santos
Spring 2013, Kuhn's Philosophy of Science
In 1926 Werner Heisenberg’s Uncertainty Principle set the field of quantum mechanics on a trajectory riddled with indeterminacy, a trajectory which stood in stark contrast with the classical Newtonian world causality and origin. In doing so, Heisenberg effectively created a new standard by which physicists conducted their science, broadened the scope of that science, and altered the very worldview of those physicists. Such paradigmatic upheaval fits the philosophical model of scientific progress posited by Thomas Kuhn. However, in the ever-changing and still-evolving world of quantum mechanics, Heisenberg’s revolutionary work uniquely strays from Kuhn’s model in its further implications.
Experimental Studies Of The Nacs 53Π0 And A3Σ+ States, Seth T. Ashman, B. Mcgeehan, C. M. Wolfe, C. Faust, K. Richter
Experimental Studies Of The Nacs 53Π0 And A3Σ+ States, Seth T. Ashman, B. Mcgeehan, C. M. Wolfe, C. Faust, K. Richter
Engineering & Physics Faculty Publications
We report high resolution measurements of 372 NaCs 53Π0(v, J) ro-vibrational level energies in the range 0 ≤ v ≤ 22. The data have been used to construct NaCs 53Π0 potential energy curves using the Rydberg–Klein-Rees and inverted perturbation approximation methods. Bound-free 53Π0(v, J) → 1(a)3Σ+ emission has also been measured, and is used to determine the repulsive wall of the 1(a)3Σ+ state and the 53Π0 → 1(a)3Σ+ relative transition dipole moment function. Hyperfine structure in the 53Π0 state has not been observed in this experiment. This null result is explained using a simple vector coupling model.
Collisional Transfer Of Population And Orientation In Nak, Seth T. Ashman, C. M. Wolfe, J. Bai, B. Beser, E. H. Ahmed, A. M. Lyyra, J. Huennekens
Collisional Transfer Of Population And Orientation In Nak, Seth T. Ashman, C. M. Wolfe, J. Bai, B. Beser, E. H. Ahmed, A. M. Lyyra, J. Huennekens
Engineering & Physics Faculty Publications
Collisional satellite lines with |ΔJ| ≤ 58 have been identified in recent polarization spectroscopy V-type optical–optical double resonance (OODR) excitation spectra of the Rb2 molecule [H. Salami et al., Phys. Rev.A80, 022515 (2009)]. Observation of these satellite lines clearly requires a transfer of population from the rotational level directly excited by the pump laser to a neighboring level in a collision of the molecule with an atomic perturber. However to be observed in polarization spectroscopy, the collision must also partially preserve the angular momentum orientation, which is at least somewhat surprising given the extremely large values of …
Global Analysis Of Data On The Spin-Orbit-Coupled A1Σ+ And B3Πu States Of Cs2, Seth T. Ashman, J. Bai, E H. Ahmed, T. Bergeman
Global Analysis Of Data On The Spin-Orbit-Coupled A1Σ+ And B3Πu States Of Cs2, Seth T. Ashman, J. Bai, E H. Ahmed, T. Bergeman
Engineering & Physics Faculty Publications
We present experimentally derived potential curves and spin-orbit interaction functions for the strongly perturbed A1+ u and b3u states of the cesium dimer. The results are based on data from several sources. Laser-induced fluorescence Fourier transform spectroscopy (LIF FTS) was used some time ago in the Laboratoire Aim´e Cotton primarily to study the X1+ g state. More recent work at Tsinghua University provides information from moderate resolution spectroscopy on the lowest levels of the b3± 0u states as well as additional high resolution data. From Innsbruck University, we have precision data obtained with cold Cs2 molecules. Recent data from Temple …
Collisional Transfer Of Population And Orientation In Nak, Seth T. Ashman, C. M. Wolfe, J. Huennekens, B. Beser, J. Bai, A. M. Lyyra
Collisional Transfer Of Population And Orientation In Nak, Seth T. Ashman, C. M. Wolfe, J. Huennekens, B. Beser, J. Bai, A. M. Lyyra
Engineering & Physics Faculty Publications
We report current work to study transfer of population and orientation in collisions of NaK molecules with argon and potassium atoms using polarization labeling (PL) and laser- induced fluorescence (LIF) spectroscopy. In the PL experiment, a circularly polarized pump laser excites a specific NaK A1Σ +(v 0=16, J 0 ) ← X1Σ +(v 00=0, J 0 ± 1) transition, creating an orientation (non-uniform MJ0 level distribution) in both levels. The linearly polarized probe laser is scanned over various 31Π(v, J 0±1) ← A1Σ +(v 0=16, J 0 ) transitions. The probe laser passes through a crossed linear polarizer before detection, …
Experimental Studies Of The Nacs 53Π0 And 1(A)3Σ+ States, Seth T. Ashman, Brett Mcgeehan, Christopher Wolfe, Carl Faust, John Huennekens
Experimental Studies Of The Nacs 53Π0 And 1(A)3Σ+ States, Seth T. Ashman, Brett Mcgeehan, Christopher Wolfe, Carl Faust, John Huennekens
Engineering & Physics Faculty Publications
We present experimental studies of the NaCs molecule that are currently underway in our laboratory. The opticaloptical double resonance method is used to obtain Doppler-free excitation spectra for several excited states. Selected data from the 53Π0 electronic state are used to obtain Rydberg-Klein-Rees (RKR) and Inverse Perturbation Approach (IPA) potential curves. We are also mapping the repulsive wall of the 1(a) 3Σ +potential using many resolved bound-free fluorescence spectra from individual ro-vibrational levels of the 53Π0 electronic state to the 1(a) 3Σ + state. Using the determined 53Π0 state potential we fit the repulsive wall of the 1(a) 3Σ + …
Experimental Studies Of Nacs, Seth T. Ashman, C. M. Wolfe, J. P. Huennekens
Experimental Studies Of Nacs, Seth T. Ashman, C. M. Wolfe, J. P. Huennekens
Engineering & Physics Faculty Publications
We present experimental studies of excited electronic states of the NaCs molecule that are currently underway in our laboratory. The optical-optical double resonance method is used to obtain Doppler-free excitation spectra for several excited states. These data are being used to obtain RydbergKlein-Rees (RKR) or Inverse Perturbation Approach (IPA) potential curves for these states. We are also trying to map the bound portion of the 1(a) 3Σ + potential using resolved laser-induced fluorescence and Fourier transform spectroscopy to record transitions into the shallow well. Bound-free spectra from single ro-vibrational levels of electronically excited states to the repulsive wall of the …
Polarization Spectroscopy And Collisions In Nak, Seth T. Ashman, C. M. Wolfe, J. Huennekens, B. Beser, J. Bai, A. M. Lyyra
Polarization Spectroscopy And Collisions In Nak, Seth T. Ashman, C. M. Wolfe, J. Huennekens, B. Beser, J. Bai, A. M. Lyyra
Engineering & Physics Faculty Publications
We report current work to study transfer of population and orientation in collisions of NaK molecules with argon and potassium atoms using polarization labeling (PL) and laser-induced fluorescence (LIF) spectroscopy. In the PL experiment, a circularly polarized pump laser excites a specific NaK A1Σ +(v=16, J) ← X1Σ +(v=0, J ± 1) transition, creating an orientation (non-uniform MJ level distribution) in both levels. The linear polarized probe laser is scanned over various 3 1Π(v=8, J 0 ± 1) ← A1Σ +(v=16, J 0 ) transitions. The probe laser passes through a crossed linear polarizer before detection, and signal is recorded …
Volume 3, Number 1 - May 1957
The Entropy
The Entropy (also published as the Providence College Journal of Physics and Chemistry) was an undergraduate scholarship journal published by the Phi Chi Club of Providence College. (Volume 3, Number 1 - May 1957 - 19 pages in total.)
Volume 2, Number 1 - May 1956
The Entropy
The Entropy (also published as the Providence College Journal of Physics and Chemistry) was an undergraduate scholarship journal published by the Phi Chi Club of Providence College. (Volume 2, Number 1 - May 1956 - 16 pages in total.)
Volume 1, Number 2 - May 1954
The Entropy
The Entropy (also published as the Providence College Journal of Physics and Chemistry) was an undergraduate scholarship journal published by the Phi Chi Club of Providence College. (Volume 1, Number 2 - May 1954 - 10 pages in total.)
Volume 1, Number 1 - January 1954
Volume 1, Number 1 - January 1954
The Entropy
The Entropy (also published as the Providence College Journal of Physics and Chemistry) was an undergraduate scholarship journal published by the Phi Chi Club of Providence College. (Volume 1, Number 1 - January 1954 - 22 pages in total.)