A5075633675- Nuclear physics research studies
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Astronomical and nuclear sciences
- High-Energy Particle Collisions Research
- Atomic and Molecular Physics
- Radiation Detection and Scintillator Technologies
- Quantum Chromodynamics and Particle Interactions
- Quantum, superfluid, helium dynamics
- Advanced Chemical Physics Studies
- Cold Atom Physics and Bose-Einstein Condensates
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Nuclear Materials and Properties
- Ion-surface interactions and analysis
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Cold Fusion and Nuclear Reactions
- High-pressure geophysics and materials
- Particle physics theoretical and experimental studies
- Statistical Mechanics and Entropy
- Astro and Planetary Science
- Quantum chaos and dynamical systems
- Electron and X-Ray Spectroscopy Techniques
- Gamma-ray bursts and supernovae
University of Rochester
2009-2024
GANIL
2011
Texas A&M University
2005-2007
University of Edinburgh
2005
Gesellschaft für Klinische Forschung
1985
GSI Helmholtz Centre for Heavy Ion Research
1985
University of Warsaw
1976-1984
Research Association for Combustion Engines
1984
Technical University of Darmstadt
1983
U.S. National Science Foundation
1975-1979
The production of intermediate mass fragments (IMF's) from the four reactions 55A MeV $^{124,136}\mathrm{Xe}$ + $^{112,124}\mathrm{Sn}$ is studied with an experimental apparatus which highly efficient for detection both charged particles and neutrons. IMF's are more localized in midvelocity region than light particles, detected multiplicity depends linearly on charge lost projectile increases neutron excess system. Remnants projectile, very little velocity reduction, found most reaction...
Intermediate-mass fragments (IMF) from the ${}^{209}{\mathrm{B}\mathrm{i}+}^{136}\mathrm{Xe}$ reaction at ${E}_{\mathrm{lab}}/A\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}28\mathrm{MeV}$ have been measured in coincidence with other products, using a highly efficient $4\ensuremath{\pi}$ detector setup. Their emission patterns exhibit features consistent dynamical fragmentation of neck zone between partners, addition to sequential statistical emission. In peripheral collisions an...
We present systematics of the ground-state $\ensuremath{\alpha}$-particle spectroscopic strengths for nuclei from $^{20}\mathrm{Ne}$ to $^{66}\mathrm{Zn}$, measured in ($^{6}\mathrm{Li}$, $d$) reaction. An oscillatory decrease $^{32}\mathrm{S}$, which is excellent agreement with SU(3) theory, followed by a striking and unexplained increase at $^{36}\mathrm{Ar}$ $^{40}\mathrm{Ca}$ then up $^{52}\mathrm{Ti}$, after there again rise.
Exclusive measurements of neutrons and charged products have been performed using a combination 4\ensuremath{\pi} neutron charged-particle detectors. The maximum observed energy dissipation corresponds to only approximately one-half the available kinetic energy. For any degree dissipation, velocity distributions particles are characteristic sequential emission following binary collisions. data imply that central collisions also lead bimodal patterns or they not sufficiently well isolated by...
Nuclei with Z up to 82 emitted in the $^{208}\mathrm{Pb}$${+}^{197}$Au reaction at ${\mathit{E}}_{\mathrm{lab}}$=29 MeV per nucleon have been measured as a function of associated neutron multiplicity. The data reveal presence strong correlations between character collision and trends suggest disassembly nuclear system into large number nucleons small fragments events highest In such events, approximately one-third neturons are released from fragment yields decrease an exponential fashion...
The shapes of \ensuremath{\alpha}-particle spectra from hot, high-spin compound nuclei produced in energetic heavy-ion fusion reactions are analyzed within the framework a statistical model. Contrary to claims made literature, good agreement is obtained between calculated and experimental when evaporation barrier each nuclide complex cascade assumed equal its respective absorption channel barrier. dependence shape on nuclear deformation discussed both terms transmission coefficients...
Multiplicities of intermediate-mass fragments (IMFs), neutrons, and charged particles were measured for ${}^{112}\mathrm{Sn}{+}^{112}\mathrm{Sn}$ ${}^{124}\mathrm{Sn}{+}^{124}\mathrm{Sn}$ at $E/A\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}40\mathrm{MeV}$. Significantly different scalings the mean IMF multiplicities with neutron charged-particle are observed two reactions. These differences can be qualitatively understood in terms fragment emission from an expanding evaporating source...
The caloric curve for mononuclear configurations is studied with a schematic model. We investigate the dependence of entropy on density and effective-mass profiles. In finite nuclei, plateau in consequence decreasing destruction correlations rather than an indication phase coexistence. regime metastable respect to binary fission at low excitation energy multifragmentation high excitation. statistical framework presented here suitable treat scenarios where experimental conditions are set...
Based on measured correlations between experimental observables in the ${}^{209}\mathrm{Bi}{+}^{136}\mathrm{Xe}$ reaction at $E/A\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}28\phantom{\rule{0ex}{0ex}}\mathrm{MeV}$, it is shown that multiple intermediate-mass fragment (IMF) production a dynamical process driven by energy of relative motion projectilelike and targetlike fragments. This kinetic converted into thermal system, until certain ``saturation'' value approximately 3 MeV/nucleon...
Following a major shortage of 99Mo in the 2009–2010 period, concern grew that aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as target material. The Organisation for Economic Co-...Read More
Intermediate-mass fragments (IMF) from the reaction 209Bi+136Xe at ElabA=28 MeV have been measured in coincidence with other charged products, as well neutrons. The IMF emission patterns are seen to exhibit signatures of two mechanisms — statistical fully accelerated massive partners and a fast dynamical single effective source. latter mechanism, possibly involving multiple neck rupture, becomes dominating for least dissipative collisions characterized by low associated light particle multiplicities.
Mass and atomic-number identification (ID) of reaction products is a fundamental requirement any nuclear study. An effective particle-ID method demonstrated, based on pulse shape analysis/discrimination (PSD) applied to large-area, single-element silicon detectors. This technique uses commercial electronic modules achieves atomic number resolution rivaling that typically obtained with multi-element (/spl Delta/E-E) detector telescopes. The the CHIMERA system without compromising its...