J. L. Klay
A5103976540- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Nuclear reactor physics and engineering
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Cosmology and Gravitation Theories
- Nuclear Materials and Properties
- Superconducting Materials and Applications
- Statistical Methods and Bayesian Inference
- Pulsars and Gravitational Waves Research
- CCD and CMOS Imaging Sensors
- Photocathodes and Microchannel Plates
- Analytical Chemistry and Sensors
- X-ray Spectroscopy and Fluorescence Analysis
- Stochastic processes and statistical mechanics
- Ion-surface interactions and analysis
- Advanced Optical Sensing Technologies
- Computational Physics and Python Applications
- Radioactivity and Radon Measurements
- Engineering and Test Systems
- Atomic and Subatomic Physics Research
California Polytechnic State University
2016-2025
Cal Poly Corporation
2025
A. Alikhanyan National Laboratory
2015-2024
Colorado School of Mines
2022
Pontifical Catholic University of Peru
2017
Istituto Nazionale di Fisica Nucleare
2012
Government of India
2012
European Organization for Nuclear Research
2012
Heidelberg University
2010
Lawrence Livermore National Laboratory
2005-2009
Momentum spectra of charged pions over nearly full rapidity coverage from target to beam have been extracted $0\ensuremath{-}5%$ most central $\text{Au}+\text{Au}$ collisions in the energy range $2A$ $8A\phantom{\rule{0.3em}{0ex}}\text{GeV}$ by E895 experiment. Using a thermal parametrization fit transverse mass spectra, density distributions are extracted. The observed compared with predictions RQMD version 2.3 cascade model and also including longitudinal flow. total $4\ensuremath{\pi}$...
Rapidity distributions of protons from central ${}^{197}\mathrm{Au}{+}^{197}\mathrm{Au}$ collisions measured by the E895 Collaboration in energy range $(2--8)A\mathrm{GeV}$ at Brookhaven AGS are presented. Longitudinal flow parameters derived using a thermal model including collective longitudinal expansion extracted these distributions. The results show an approximately linear increase velocity, $〈\ensuremath{\beta}\ensuremath{\gamma}{〉}_{L}$, as function logarithm beam energy.
Fission fragment angular distributions can provide an important constraint on fission theory, improving predictive codes, and are a prerequisite for precise ratio cross section measurement. Available anisotropy data is sparse, especially at neutron energies above 5 MeV. For the first time, three-dimensional tracking detector employed to study emission angles direct measurement of anisotropy. The Neutron Induced Fragment Tracking Experiment (NIFFTE) collaboration has deployed time projection...
The normalized $^{238}$U(n,f)/$^{235}$U(n,f) cross section ratio has been measured using the NIFFTE fission Time Projection Chamber from reaction threshold to $30$~MeV. fissionTPC is a two-volume MICROMEGAS time projection chamber that allows for full three-dimensional reconstruction of fission-fragment ionization profiles neutron-induced fission. measurement was performed at Los Alamos Neutron Science Center, where neutron energy determined time-of-flight. reported here first made with...
The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) collaboration has performed measurements with a fission time projection chamber (fissionTPC) to study the process by reconstructing full three-dimensional tracks of fragments and other ionizing radiation. amount linear momentum imparted fissioning nucleus incident neutron can be inferred measuring opening angle between fragments. Using this measured momentum, fragment angular distributions converted center-of-mass frame for...
Standard jet-finding techniques used in elementary particle collisions have not been successful the high track density of heavy-ion collisions. This paper describes a modified cone-type algorithm developed for complex environment The primary modification to is evaluation and subtraction large background energy, arising from uncorrelated soft hadrons, each collision. A detailed analysis energy its event-by-event fluctuations has performed on simulated data, method estimate inside jet cone...
We have measured and compared the characteristics of ALD-coated Planacon MCP-PMTs (XP85112/A1-Q-L) with their non-ALD counterparts (XP85012/A1-Q). While later show excellent performance, sensors surprisingly low current saturation levels (~two orders magnitude lower than expected) extremely high gain recovery time (more 7 higher expected). suspect that these problems might be caused by unexpected side-effects ALD process. To make a definite conclusion, more samples need to tested, preferably...
The excitation energy per residue nucleon (${E}^{*}/A$) and fast thermal light particle multiplicities are studied as a function of centrality defined the number grey tracks emitted ${N}_{\mathrm{grey}}$ by mean primary hadron-nucleon scatterings ($\ensuremath{\langle}\ensuremath{\nu}\ensuremath{\rangle}$) impact parameter ($\ensuremath{\langle}b\ensuremath{\rangle}$) extracted from it. value ${E}^{*}/A$ show an increase with for all systems, 14.6 GeV p-Au 8.0 \ensuremath{\pi}-Au...
The Neutron Induced Fission Fragment Tracking Experiment (NIFFTE) is a double-sided Time Projection Chamber (TPC) with micromegas readout designed to measure the energy-dependent neutron-induced fission cross sections of major and minor actinides unprecedented accuracy. NIFFTE project addresses challenge minimizing sources systematic uncertainties from previous chamber measurements such as: target beam non-uniformities, misidentification alpha light charged particles as fragments, inherent...
Recent results on high transverse momentum (pT) hadron production in p+p, d+Au and Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC) are reviewed. Comparison of nuclear modification factors, $R_{dAu}(pT)$ $R_{AA}(pT)$, demonstrates that large suppression central is due to strong final-state effects. Theoretical models which incorporate jet quenching via gluon Bremsstrahlung dense partonic medium expected ultra-relativistic energies shown reproduce shape magnitude observed over...