A5042730409- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Advanced Chemical Physics Studies
- Particle accelerators and beam dynamics
- X-ray Spectroscopy and Fluorescence Analysis
- Astronomical and nuclear sciences
- Advanced NMR Techniques and Applications
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Quantum, superfluid, helium dynamics
- Nuclear reactor physics and engineering
- Particle physics theoretical and experimental studies
- Magnetic confinement fusion research
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Mass Spectrometry Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Gamma-ray bursts and supernovae
- Inorganic Fluorides and Related Compounds
- Rare-earth and actinide compounds
- Neutrino Physics Research
- Particle Detector Development and Performance
- Ion-surface interactions and analysis
University of Notre Dame
2016-2025
Notre Dame College
2021-2024
Joint Institute for Nuclear Astrophysics
2014-2024
Michigan State University
2010-2018
The University of Tokyo
2010-2014
Development Agency of Serbia
2014
Osaka University
2001-2012
Indiana University Bloomington
1994-2012
University of Groningen
2003-2011
Tohoku University
2009-2011
We perform the first direct mass measurements of neutron-rich calcium isotopes beyond neutron number 34 at RIKEN Radioactive Isotope Beam Factory by using time-of-flight magnetic-rigidity technique. The atomic excesses ^{55-57}Ca are determined for time to be -18650(160), -13510(250), and -7370(990) keV, respectively. examine emergence magicity N=34 based on new masses. masses provide experimental evidence appearance a sizable energy gap between 2p_{1/2} 1f_{5/2} orbitals in ^{54}Ca,...
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 $^{26}\mathrm{Mg}$($d$,$^{2}\mathrm{He}$)...
Gamow-Teller (GT) transitions in atomic nuclei are sensitive to both nuclear shell structure and effective residual interactions. The GT excitations were studied for the mass number $A=42$, 46, 50, 54 ``$f$-shell'' ($^{3}\mathrm{He}$, $t$) charge-exchange reactions. In $^{42}\mathrm{Ca}\ensuremath{\rightarrow}^{42}\mathrm{Sc}$ reaction, most of strength is concentrated lowest excited state at 0.6 MeV, suggesting existence a low-energy phonon excitation. As $A$ increases, high-energy...
The incompressibility of infinite nuclear matter (𝐾∞) is a parameter in the description equation state that governs energy cost associated with density oscillations near saturation density. most direct experimental method for studying this property to probe isoscalar giant monopole resonance (ISGMR) finite nuclei. This paper explores use 6Li as study ISGMR several stable nuclei: 58Ni, 90Zr, 116Sn, and 208Pb, complementary using inelastic scattering 𝛼 particles, which has been used great...
The synthesis of heavy elements in supernovae is affected by low-energy <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mo>(</a:mo><a:mi>n</a:mi><a:mo>,</a:mo><a:mi>p</a:mi><a:mo>)</a:mo></a:mrow></a:math> and <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mo>(</b:mo><b:mi>p</b:mi><b:mo>,</b:mo><b:mi>n</b:mi><b:mo>)</b:mo></b:mrow></b:math> reactions on unstable nuclei, yet experimental data such reaction rates are scarce. SECAR (SEparator for CApture...
Fragmentation and splitting of the Gamow-Teller (GT) strength has been observed in a systematic study ${(}^{3}$He,t) charge-exchange reaction at E${(}^{3}$He)=200 MeV over entire range stable Sn isotopes. Triton energy spectra were with high-resolution magnetic spectrometer angles near \ensuremath{\theta}=0\ifmmode^\circ\else\textdegree\fi{} where \ensuremath{\Delta}L=0 transitions are enhanced. Excitation energies, widths, 0\ifmmode^\circ\else\textdegree\fi{} cross sections, strengths B(GT)...
The $^{22}$Ne($\alpha$,n)$^{25}$Mg reaction is the dominant neutron source for slow capture process ($s$-process) in massive stars and contributes, together with $^{13}$C($\alpha$,n)$^{16}$O, to production of neutrons $s$-process Asymptotic Giant Branch (AGB) stars. However, endothermic competes directly $^{22}$Ne($\alpha,\gamma)^{26}$Mg radiative capture. uncertainties both reactions are large owing uncertainty level structure $^{26}$Mg near alpha separation energies. These affecting...
We used the $^{16}\mathrm{O}$${(}^{3}$He,n${)}^{18}$Ne, $^{12}\mathrm{C}$${(}^{12}$C${,}^{6}$He${)}^{18}$Ne, and $^{20}\mathrm{Ne}$(p,t${)}^{18}$Ne reactions to study $^{18}\mathrm{Ne}$ states up an excitation energy of 10 MeV, with emphasis on levels corresponding $^{14}\mathrm{O}$(\ensuremath{\alpha},p${)}^{17}$F $^{17}\mathrm{F}$(p,\ensuremath{\gamma}${)}^{18}$Ne resonances that could strongly affect these reaction rates in hot stellar environments. Excitation energies, widths, absolute...
The fine structure of the Gamow-Teller resonance in a medium-heavy nucleus is observed for first time high-resolution $^{90}\mathrm{Zr}(^{3}\mathrm{He},t)^{90}\mathrm{Nb}$ experiment at Research Center Nuclear Physics, Osaka. Using novel wavelet analysis technique, it possible to extract characteristic energy scales and quantify their relative importance generation structure. This method combined with selectivity reaction permits an extraction level density ${1}^{+}$ states $^{90}\mathrm{Nb}$.
We performed the first direct mass measurements of neutron-rich scandium, titanium, and vanadium isotopes around neutron number 40 at RIKEN RI Beam Factory using time-of-flight magnetic-rigidity technique. The atomic excesses Sc58−60, Ti60−62, V62−64 were measured for time. experimental results show that two-neutron separation energies in vicinity Ti62 increase compared to neighboring nuclei. This shows masses Ti near N=40 are affected by Jahn-Teller effect. Therefore, a development...
"Vorkommen und Geochemie der mineralischen Rohstoffe." Geologiska Föreningen i Stockholm Förhandlingar, 57(4), p. 671
The next-generation magnetic recoil spectrometer (MRSnext) is being designed to replace the current MRS at National Ignition Facility and OMEGA for measurements of neutron spectrum from an inertial confinement fusion implosion. MRSnext will provide a far-superior performance faster data turnaround than systems, i.e., 2× 6× improvement in energy resolution NIF OMEGA, respectively, 20× time. substantially improved enabled by using electromagnets that short focal plane (12–16 cm) unprecedented...
Under the assumption that isospin T is a good quantum number, isobaric analog states and various analogous transitions among these are expected in isobars with mass number A. Strengths of Gamow-Teller (GT) $M1$ have been compared for an $A=26$ isobar triplet ${T}_{z}=+1, 0,$ $\ensuremath{-}1,$ where ${T}_{z}$ defined by ${T}_{z}=(N\ensuremath{-}Z)/2.$ The ${T}_{z}=+\stackrel{\ensuremath{\rightarrow}}{1}0$ GT from ${J}^{\ensuremath{\pi}}{=0}^{+}$ ground state ${}^{26}\mathrm{Mg}$ to excited...
The isoscalar giant dipole resonance (ISGDR) in ${}^{208}\mathrm{Pb}$ has been investigated using inelastic scattering of 200 MeV $\ensuremath{\alpha}$ particles at and near 0\ifmmode^\circ\else\textdegree\fi{} where the angular distribution ISGDR can be clearly differentiated from those other modes. ``difference spectra'' technique was employed to separate high-energy octupole (HEOR). These data provide clearest evidence yet for adjacent HEOR. With these results, all expected...
Differential cross sections and analyzing powers for scattering of 200 MeV protons have been measured states $^{16}\mathrm{O}$ up to 14.4 $^{40}\mathrm{Ca}$ 7.2 excitation. The data cover c.m. momentum transfers from approximately 0.4 ${\mathrm{fm}}^{\mathrm{\ensuremath{-}}1}$ 3.0 ${\mathrm{fm}}^{\mathrm{\ensuremath{-}}1}$. Calculations were performed using several density-dependent effective interactions in the local density approximation. Empirical isoscalar normal-parity transitions...