A5048145520- Nuclear physics research studies
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Rare-earth and actinide compounds
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Nuclear reactor physics and engineering
- Quantum, superfluid, helium dynamics
- Earthquake Detection and Analysis
- Astro and Planetary Science
- Advanced Semiconductor Detectors and Materials
- Advanced NMR Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactivity and Radon Measurements
- Radiation Effects in Electronics
- Medical Imaging Techniques and Applications
- Silicon Nanostructures and Photoluminescence
- Radioactive element chemistry and processing
- Nuclear Materials and Properties
- Advanced Chemical Physics Studies
- Titanium Alloys Microstructure and Properties
- Seismology and Earthquake Studies
University of Massachusetts Lowell
2011-2021
United States Naval Research Laboratory
2017-2019
Argonne National Laboratory
2009-2012
University of Maryland, College Park
2011
Dartmouth College
2005
Applied Science Private University
1959
University of Leeds
1959
The nuclei ${}^{65,67}$Cu were studied in reactions between a 430-MeV ${}^{64}$Ni beam and thick ${}^{238}$U target with the Gammasphere array. Decay schemes for both have been extended, spin parity assignments of observed states constrained by measured $\ensuremath{\gamma}$-ray angular distributions correlations. Positive-parity level structures, based on ${p}_{3/2}$ protons coupled to negative-parity Ni cores, identified above known $9/{2}^{+}$ states. In ${}^{67}$Cu, dipole band built...
Auroral MF burst is a broadband impulsive natural radio emission of auroral origin observed at ground level in the frequency range 0.8–4.5 MHz. Application semiautomated analysis method to data collected South Pole Station, 74° magnetic latitude, results database frequencies, amplitudes, and universal times emissions during 1 January–31 December 2003. Besides confirming that are only darkness local time plays significant role controlling occurrence rate, which maximizes pre‐magnetic‐midnight...
Fast-rotating N=151 isotones 245Pu, 247Cm and 249Cf have been studied through inelastic excitation transfer reactions with radioactive targets. While all a ground-state band built on νj15/2[734]9/2− Nilsson configuration, new excited bands also observed in each isotone. These odd-N allow comparison of the alignment behavior for two different configurations, where νj15/2 is either blocked or allowed. The effect higher order deformations explored cranking calculations, which help clarify...
Gamma rays from $^{52}\mathrm{Ti}$ have been studied with Gammasphere and the Fragment Mass Analyzer using reactions induced by a $^{48}\mathrm{Ca}$ beam on $^{9}\mathrm{Be}$ target. The data used in combination information deep-inelastic of beams thick $^{238}\mathrm{U}$ target at an energy about $25%$ above Coulomb barrier. level scheme was expanded considerably, lifetimes some identified states were determined for first time. excitation two protons neutrons outside core provide new tests...
The Strontium Iodide Radiation Instrumentation (SIRI) is designed to space-qualify new gamma-ray detector technology for space-based astrophysical and defense applications. This offers improved energy resolution, lower power consumption reduced size compared similar systems. SIRI instrument consists of a single europiumdoped strontium iodide (SrI<sub>2</sub>:Eu) scintillation detector. crystal has an resolution 3% at 662 keV the 6.5% traditional sodium was developed terrestrial-based weapons...
The decay of a ${K}^{\ensuremath{\pi}}={8}^{\ensuremath{-}}$ isomer in $^{244}\mathrm{Pu}$ and the collective band structures populating were studied using deep inelastic excitations with $^{47}\mathrm{Ti}$ $^{208}\mathrm{Pb}$ beams, respectively. Precise measurements $M1/E2$ branching ratios confirm $9/{2}^{\ensuremath{-}}{[734]}_{\ensuremath{\nu}}\ensuremath{\bigotimes}7/{2}^{+}{[624]}_{\ensuremath{\nu}}$ configuration assignment for isomer, validating systematics...
Garrett et al. systematically investigated band-crossing frequencies resulting from the rotational alignment of first pair ${i}_{13/2}$ neutrons (AB) in rare-earth nuclei. In that study, evidence was found for an odd-even neutron number dependence attributed to changes strength pairing correlations. The present paper carries out a similar investigation at higher second aligning (BC). Again, systematic difference is observed between odd-$N$ and even-$N$ Er, Yb, Hf, W nuclei, but BC case, it...
A significant extension of the level scheme for odd-odd nucleus $^{172}\mathrm{Re}$ was accomplished through use Gammasphere spectrometer. States up to a tentative spin assignment 39 were observed and two new structures identified. Configuration assignments are proposed based on alignment properties band crossings.
An apparatus has been constructed to provide a number of high-intensity xenon flash discharges at time intervals from 0.1 2.5 × 10-4 s between flashes, each dissipating 300 W.s in approximately 180 ms. Two flash-head arrangements were used: one, the tubes mounted on rotating disk thus giving series flashes one fixed position, whilst other consisted stationary bank tubes, location individual determining position flash.
The phenomenon of wobbling can only occur for a nuclear shape with stable triaxial deformation. To date, few examples this exotic collective mode have been observed in lutetium and tantalum isotopes. A search sequence was performed ${}^{171}$Re to determine if feature be $Z>73$ nuclei. No evidence found wobbling; however, an interaction between the $\ensuremath{\pi}{i}_{13/2}$ another positive-parity band may give indication on why not nucleus. level scheme significantly extended...
Spectroscopic studies of nuclei in the A∼250, Z∼100 region provide critical input to theoretical models that attempt describe structure and stability heaviest elements. We report here on new spectroscopic N = 150,151 244,245Pu. (Z 94). Excitations these neutron‐rich side valley stability, accessed via inelastic transfer reactions, complement fusion‐evaporation Z≥100 nuclei. States 244,245Pu were populated using 47Ti 208Pb beams incident a 244Pu target, with delayed prompt gamma rays detected...