A5054733892- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Radioactive Decay and Measurement Techniques
- Gamma-ray bursts and supernovae
- Experimental Learning in Engineering
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactivity and Radon Measurements
- Engineering Education and Curriculum Development
- Astrophysical Phenomena and Observations
- High-pressure geophysics and materials
- Stellar, planetary, and galactic studies
- Scientific Measurement and Uncertainty Evaluation
- Innovative Teaching and Learning Methods
- Radiation Therapy and Dosimetry
- Astro and Planetary Science
- Boron Compounds in Chemistry
- Pulsars and Gravitational Waves Research
Michigan State University
2005-2024
Conway School of Landscape Design
2017-2024
Coastal Carolina University
2017-2024
University of Kansas
2024
Center for Innovation
2024
Aerospace Institute (Germany)
2024
Khalifa University of Science and Technology
2011-2017
National Superconducting Cyclotron Laboratory
2005-2012
Joint Institute for Nuclear Astrophysics
2005-2012
This paper presents a systematic evaluation of the ability theoretical models to reproduce experimental Gamow-Teller transition strength distributions measured via (n,p)-type charge-exchange reactions at intermediate beam energies. The focus is on transitions from stable nuclei in pf shell (45<A<64). impact deviations between and derived stellar electron-capture rates densities temperatures relevance for Type Ia II supernovae investigated. included study are based shell-model, using KB3G...
A new technique to measure $(p,n)$ charge-exchange reactions in inverse kinematics at intermediate energies on unstable isotopes was successfully developed and used study the $^{56}\mathrm{Ni}(p,n)$ reaction $110\text{ }\text{ }\mathrm{MeV}/\mathrm{u}$. Gamow-Teller transition strengths from $^{56}\mathrm{Ni}$ leading $^{56}\mathrm{Cu}$ were obtained compared with shell-model predictions $pf$ shell using KB3G GXPF1A interactions. The calculations interaction reproduce experimental strength...
Abstract X-ray observations of transiently accreting neutron stars during quiescence provide information about the structure star crusts and properties dense matter. Interpretation observational data requires an understanding nuclear reactions that heat cool crust accretion define its nonequilibrium composition. We identify here in detail typical reaction sequences down to a depth inner where mass density is <?CDATA $\rho =2\times {10}^{12}\,{\rm{g}}\,{\mathrm{cm}}^{-3}$?> using full network...
It is shown via a study on $^{26}\mathrm{Mg}$ target that the ($t$,$^{3}\mathrm{He}$) reaction at 115 MeV/nucleon an accurate probe for extracting Gamow-Teller transition strengths. To do so, data are complemented by results from $^{26}\mathrm{Mg}$($^{3}\mathrm{He}$, $t$) 140 allows comparison of $T=2$ analog states excited mirror reactions. Extracted strengths $^{26}\mathrm{Mg}$($t$,$^{3}\mathrm{He}$) and compared with those $^{26}\mathrm{Mg}$($d$,$^{2}\mathrm{He}$)...
The $^{150}\mathrm{Nd}$($^{3}\mathrm{He}$,$t$) reaction at $140$ MeV/u and $^{150}\mathrm{Sm}$($t$,$^{3}\mathrm{He}$) $115$ were measured, populating excited states in $^{150}\mathrm{Pm}$. transitions studied populate intermediate of importance for the (neutrinoless) $\ensuremath{\beta}\ensuremath{\beta}$ decay $^{150}\mathrm{Nd}$ to $^{150}\mathrm{Sm}$. Monopole dipole contributions measured excitation-energy spectra extracted by using multipole decomposition analyses. experimental results...
Resistive random-access memory (RRAM) technology has been gaining importance due to scalability, low power, non-volatility, and the ability perform in-memory computing. The RRAM sensing applications have also emerged enable single platforms which include sensing, data storage, This paper reports on sol-gel drop coated low-power <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$\mu $...
We report on the first determination of absolute B(E2;0+(1)-->2+(1)) excitation strength in N=Z nucleus 72Kr. 72Kr is heaviest for which this quantity has been measured and provides a benchmark region nuclear chart dominated by rapidly changing deformations shapes mediated interplay strongly oblate prolate-driving orbitals. The deduced quadrupole deformation agreement with variety self-consistent models that predict an shape ground state Large-scale shell-model Monte Carlo calculations...
Differential cross sections for transitions of known weak strength were measured with the (3He, t) reaction at 420 MeV on targets 12C, 13C, 18O, 26Mg, 58Ni, 60Ni, 90Zr, 118Sn, 120Sn, and 208Pb. Using these data, it is shown that proportionalities between strengths this probe follow simple trends as a function mass number. These can be used to confidently determine Gamow-Teller distributions in nuclei which proportionality cannot calibrated via β-decay strengths. Although theoretical...
Beta-delayed proton emission from nuclides in the neighborhood of 100Sn was studied at National Superconducting Cyclotron Laboratory. The nuclei were produced by fragmentation a 120 MeV/nucleon 112Sn primary beam on Be target. Beam purification provided A1900 Fragment Separator and Radio Frequency Separator. fragments interest identified their decay with NSCL Beta Counting System (BCS) conjunction Segmented Germanium Array (SeGA). 96Cd, 98Ing, 98Inm 99In as beta-delayed emitters, branching...
Background: Gamow-Teller (GT) transition strength distributions in stable and unstable $pf$-shell isotopes are key inputs for estimating electron-capture rates important stellar evolution. Charge-exchange experiments at intermediate beam energies have long been used to test theoretical predictions GT strengths, but previous were largely restricted nuclei. Since a large fraction of the nuclei relevant astrophysical applications (including such as ${}^{56}$Ni) unstable, new methods needed...
The proportionality between differential cross sections at vanishing linear momentum transfer and Gamow-Teller transition strength, expressed in terms of the \textit{unit section} ($\hat{\sigma}_{GT}$) was studied as a function target mass number for ($t$,$^{3}$He) ($^{3}$He,$t$) reactions 115 $A$MeV 140 $A$MeV, respectively. Existing data on targets with $12\leq A\leq 120$ were complemented new reevaluated proton, deuteron, $^{6}$Li $^{12}$C targets. It found that spite small difference...
We report on the first successful extraction of a β+ Gamow-Teller strength distribution from radioactive isotope in an intermediate-energy charge-exchange experiment inverse kinematics. The (7Li,7Be+γ(429 keV)) reaction at 100A MeV was used to measure transition strengths 34P states 34Si. results show that little mixing occurs between sd and pf shell configurations for low-lying 0+ 2+ even though 34Si neighbors island inversion 2ℏω intruder exist. Shell-model calculations sdpf model space...
In this paper we introduce the Collaborative Learning Environment (CLE), a novel document creation tool, designed at Etisalat-British Telecomm Innovation Center (EBTIC) and created to enable enhance team-based negotiation of online, interactive writing tasks. We provide context in which tool has been trialed, discuss case study where is used gain deep understanding into way students thought about implemented given
The Gamow-Teller strength in the β(+) direction to (46)Sc was extracted via (46)Ti(t,(3)He + γ) reaction at 115 MeV/u. γ-ray coincidences served precisely measure very weak transition a final state 991 keV. Although this is weak, it crucial for accurately estimating electron-capture rates astrophysical scenarios with relatively low stellar densities and temperatures, such as presupernova evolution. Shell-model calculations different effective interactions pf shell-model space do not...
The $^{64}\mathrm{Zn}$($t$,$^{3}\mathrm{He}$) reaction has been studied by using a secondary triton beam of 115 MeV/nucleon to extract the Gamow-Teller transition-strength distribution $^{64}\mathrm{Cu}$. results were compared with shell-model calculations $\mathit{pf}$-shell effective interactions KB3G and GXPF1A existing data from $^{64}\mathrm{Zn}$($d$,$^{2}\mathrm{He}$) reaction. Whereas experimental exhibited good consistency, neither theoretical predictions managed reproduce data....
Nuclei around the $N=40$ ``island of inversion'' exhibit interesting structure features that have been focus several experimental and theoretical studies. The present work presents first complete study $\ensuremath{\beta}$-decay feeding intensity distribution Gamow-Teller for $\ensuremath{\beta}$ decay $^{64}\mathrm{Mn}$ to $^{64}\mathrm{Fe}$ up $\ensuremath{\approx}10$ MeV. function was extracted from total absorption spectroscopy measurements made at National Superconducting Cyclotron...
The Gamow-Teller strength for the transition from ground state of $^{13}\mathrm{C}$ to $T=1/2,{J}^{\ensuremath{\pi}}=3/{2}^{\ensuremath{-}}$ excited at 3.51 MeV in $^{13}\mathrm{N}$ is extracted via $^{13}\mathrm{C}$($^{3}\mathrm{He}$,$t$) reaction 420 MeV. In contrast results earlier ($p,n$) studies on $^{13}\mathrm{C}$, a good agreement with shell-model calculations and empirical unit cross-section systematics other nuclei found. are used study analog...
Gamow-Teller and dipole transitions to final states in $^{13}\mathrm{B}$ were studied via the $^{13}\mathrm{C}(t,^{3}\mathrm{He})$ reaction at ${E}_{t}=115A$ MeV. In addition strong transition ground state, a weaker state 3.6 MeV was found. This assigned spin-parity of $3/{2}^{\ensuremath{-}}$ by comparison with shell-model calculations using WBP WBT interactions which modified allow for mixing between $n\ensuremath{\hbar}\ensuremath{\omega}$ $(n+2)\ensuremath{\hbar}\ensuremath{\omega}$...
A half-life of 2.2 \ifmmode\pm\else\textpm\fi{} 0.2 s has been deduced for the ground-state $\ensuremath{\beta}$ decay $^{84}\mathrm{Mo}$, more than $1\ensuremath{\sigma}$ shorter previously adopted value. $^{84}\mathrm{Mo}$ is an even-even $N=Z$ nucleus lying on proton dripline, created during explosive hydrogen burning in type I x-ray bursts rapid capture ($\mathit{rp}$) process. The effect measured $\mathit{rp}$-process reaction flow explored. Implications theoretical treatments nuclear...
The beta-decay properties of the N=Z nuclei 96Cd, 98In, and 100Sn have been studied. These were produced at National Superconducting Cyclotron Laboratory by fragmenting a 120 MeV/nucleon 112Sn primary beam on Be target. resulting radioactive was filtered in A1900 newly commissioned Radio Frequency Fragment Separator to achieve purity level suitable for decay studies. observed production cross sections these are lower than predicted factors 10-30. half-life which last experimentally unknown...