A5041952432- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Atomic and Subatomic Physics Research
- Astronomical and nuclear sciences
- Nuclear reactor physics and engineering
- Quantum, superfluid, helium dynamics
- Particle accelerators and beam dynamics
- Ion-surface interactions and analysis
- Cold Atom Physics and Bose-Einstein Condensates
- Radioactive contamination and transfer
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Isotope Analysis in Ecology
- Laser Design and Applications
- Superconducting Materials and Applications
- Radioactive Decay and Measurement Techniques
- Astro and Planetary Science
- X-ray Spectroscopy and Fluorescence Analysis
- Particle physics theoretical and experimental studies
- Nuclear Materials and Properties
- Advanced Chemical Physics Studies
- Magnetic confinement fusion research
- Laser-induced spectroscopy and plasma
RIKEN Nishina Center
2012-2024
High Energy Accelerator Research Organization
2009-2022
University of Jyväskylä
2006-2014
RIKEN
2009-2014
Nippon Soken (Japan)
2009-2012
Petersburg Nuclear Physics Institute
2010
KU Leuven
2008-2010
RIKEN Advanced Science Institute
2008-2009
University of Electro-Communications
2009
Sophia University
2009
Atomic masses of the neutron-rich isotopes (76-80)Zn, (78-83)Ga, (80-85)Ge, (81-87)As, and (84-89)Se have been measured with high precision using Penning trap mass spectrometer JYFLTRAP at IGISOL facility. The (82,83)Ga, (83-85)Ge, (84-87)As, 89Se were for first time. These new data represent a major improvement in knowledge this region. Two-neutron separation energies provide evidence reduction N=50 shell gap energy towards germanium (Z=32) subsequent increase gallium (Z=31). are compared...
The masses of very neutron-deficient nuclides close to the astrophysical rp- and νp-process paths have been determined with Penning trap facilities JYFLTRAP at JYFL/Jyväskylä SHIPTRAP GSI/Darmstadt. Isotopes from yttrium (Z=39) palladium (Z=46) produced in heavy-ion fusion-evaporation reactions. In total, 21 were studied, almost half mass values experimentally for first time: 88Tc, 90−92Ru, 92−94Rh, 94,95Pd. For 95Pdm, (21/2+) high-spin state, a direct determination was performed. Relative...
The β feeding probability of Tc102,104,105,106,107, Mo105, and Nb101 nuclei, which are important contributors to the decay heat in nuclear reactors, has been measured using total absorption technique. We have coupled for first time a spectrometer Penning trap order obtain sources very high isobaric purity. Our results solve significant part long-standing discrepancy γ component Pu239 4–3000 s range.Received 13 May 2010DOI:https://doi.org/10.1103/PhysRevLett.105.202501© 2010 American Physical Society
The masses of neutron-rich $^{106\ensuremath{-}112}\mathrm{Tc}$, $^{106\ensuremath{-}115}\mathrm{Ru}$, $^{108\ensuremath{-}118}\mathrm{Rh}$, and $^{112\ensuremath{-}120}\mathrm{Pd}$ produced in proton-induced fission uranium were determined using the JYFLTRAP double Penning trap setup. measured isotopic chains include a number previously unmeasured nuclei. Typical precisions on order 10 keV or better achieved, representing factor improvement over earlier data. In many cases, significant...
For the first time, in-gas-cell laser spectroscopy study of (57,59,63,65)Cu isotopes has been performed using 244.164 nm optical transition from atomic ground state copper. The nuclear magnetic dipole moments for (57,59,65)Cu relative to that (63)Cu have extracted. new value (57)Cu mu((57)Cu) = +2.582(7)mu(N) is in strong disagreement with previous literature but good agreement recent theoretical and systematic predictions.
A multi-reflection time-of-flight mass spectrograph, competitive with Penning trap spectrometers, has been built at RIKEN. We have performed a first online measurement, using 8Li+ (T1/2 = 838 ms). new analysis method realized, which, only 12C+ references, the excess of 8Li was accurately determined to be 20947.6(15)(34) keV (dm/m 6.6 x 10-7). The speed, precision and accuracy this measurement exemplifies potential for type spectrograph measurements short-lived nuclei.
The atomic masses of ^{55}Sc, ^{56,58}Ti, and ^{56-59}V have been determined using the high-precision multireflection time-of-flight technique. radioisotopes produced at RIKEN's Radioactive Isotope Beam Factory (RIBF) delivered to novel designed gas cell system, which has recently commissioned downstream ZeroDegree spectrometer following BigRIPS separator. For ^{56,58}Ti ^{56-59}V, mass uncertainties reduced down order 10 keV, shedding new light on N=34 shell effect in Ti V isotopes by first...
A search for new neutron-rich isotopes near the $N=60$ isotones $^{92}\mathrm{Ge}$ and $^{93}\mathrm{As}$ has been performed using a 345 MeV/nucleon $^{238}\mathrm{U}$ beam at RIKEN Nishina Center RI Beam Factory. Fission fragments produced were analyzed identified in flight large-acceptance two-stage separator BigRIPS. We have observed total of 15 isotopes: $^{84}\mathrm{Cu}, ^{86,87}\mathrm{Zn}, ^{88,89}\mathrm{Ga}, ^{91,92}\mathrm{Ge}, ^{93,94,95}\mathrm{As}, ^{96,97}\mathrm{Se},...
The beta-decay Q(EC) values of the superallowed beta emitters 26Alm, 42Sc, and 46V have been measured with a Penning trap to relative precision better than 8 x 10(-9). Our result for 46V, 7052.72(31) keV, confirms recent measurement that differed from previously accepted reaction-based value. However, our results 26Alm 4232.83(13) keV 6426.13(21) are consistent previous values. By eliminating possibility systematic difference between two techniques, this demonstrates no significant shift in...
In-gas-cell laser spectroscopy of the isotopes $^{57,58,59,63,65}\mathrm{Cu}$ has been performed at LISOL facility using $244.164$-nm optical transition from atomic ground state copper. A detailed discussion on hyperfine structure $^{63}\mathrm{Cu}$ is presented. The magnetic dipole moments $^{57,58,59,65}\mathrm{Cu}$ are extracted based that $^{63}\mathrm{Cu}$. new value $\ensuremath{\mu}=+0.479(13){\ensuremath{\mu}}_{N}$ proposed for $^{58}\mathrm{Cu}$, consistent with a...
The β-feeding probabilities for three important contributors to the decay heat in nuclear reactors, namely 102,104,105Tc, have been measured using total absorption spectroscopy technique. For measurements, sources of very high isobaric purity obtained a Penning trap (JYFLTRAP). A detailed description data analysis is given and results are compared with high-resolution measurements theoretical calculations.16 MoreReceived 23 October 2012DOI:https://doi.org/10.1103/PhysRevC.87.044318©2013...
The ground state hyperfine splitting of (7)Be+ has been measured by laser-microwave double-resonance spectroscopy in the online rf trap RIKEN's slow RI-beam facility. Be ions produced projectile fragmentation 13C at approximately 1 GeV were thermalized a ion guide gas cell and subsequently laser cooled to microeV. This 10(15)-fold reduction kinetic energy allows precision these ions. A magnetic hfs constant A=-742.772 28(43) MHz was for 7Be+, from which nuclear moment mu(I)=-1.399 28(2)mu(N) deduced.
Nuclides in the vicinity of $^{94}\mathrm{Ag}$ have been studied with Penning trap mass spectrometer JYFLTRAP at Ion-Guide Isotope Separator On-Line. The masses two-proton-decay daughter $^{92}\mathrm{Rh}$ and beta-decay $^{94}\mathrm{Pd}$ high-spin isomer measured, $^{93}\mathrm{Pd}$ deduced. When combined data from one-proton- or experiments, results lead to contradictory excess values for $^{94}\mathrm{Ag}$, $\ensuremath{-}46\text{ }370(170)$ $\ensuremath{-}44\text{ }970(100)\text{...