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Guo, C. Y.*; Andreyev, A. N.; 他38名*
European Physical Journal A, 60(8), p.165_1 - 165_10, 2024/08
被引用回数:0 パーセンタイル:0.00(Physics, Nuclear)The prompt and delayed -ray spectra of
Tl was studied via the
Nd(
Cr,
)
Tl fusion-evaporation reaction. The collective bands with one-quasiparticle configurations from the 2
, 1
, 1
, and 1
orbitals and high-lying structures with possible three-quasiparticle configurations are investigated in terms of the tilted axis cranking covariant density functional theory. At low excitation energy, the rotational bands with one-quasiparticle configurations reflect coexistence of three shapes: prolate, triaxial, and oblate. The possible shapes of two microsecond isomers at high excitation energy are proposed.
Barzakh, A. E.*; Andreyev, A. N.; Atanasov, D.*; Cubiss, J. G.*; Harding, R. D.*; Al Monthery, M.*; Althubiti, N. A.*; Andel, B.*; 他38名*
Nuclear Instruments and Methods in Physics Research B, 513, p.26 - 32, 2022/02
被引用回数:1 パーセンタイル:18.16(Instruments & Instrumentation)The yield of 18 beams of radioactive gold nuclei produced by irradiating the ISOLDE uranium target with 1.4-GeV protons was measured. The production-efficiency dependence on the half-life was derived using the in-target production calculations. Three release models were tested to describe the results. Irregularities in the efficiency curve for 3 long-lived high-spin gold isomers (Au
) were found, which require further investigation.
Abudinn, F.*; 谷田 聖; Belle II Collaboration*; 他385名*
Physical Review Letters, 127(21), p.211801_1 - 211801_9, 2021/11
被引用回数:10 パーセンタイル:64.86(Physics, Multidisciplinary)We report a measurement of the and
lifetimes using
and
decays reconstructed in
data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy
collider. The data, collected at center-of-mass energies at or near the
resonance, correspond to an integrated luminosity of
. The results,
and
, are the most precise to date and are consistent with previous determinations.
Adare, A.*; 長谷川 勝一; 今井 憲一; 永宮 正治; 佐甲 博之; 佐藤 進; 谷田 聖; PHENIX Collaboration*; 他389名*
Physical Review D, 95(9), p.092003_1 - 092003_13, 2017/05
被引用回数:2 パーセンタイル:12.60(Astronomy & Astrophysics)We report the first measurement of the full angular distribution for inclusive decays in
collisions at
GeV. The measurements are made for
transverse momentum
GeV/
and rapidity
in the Helicity, Collins-Soper, and Gottfried-Jackson reference frames. In all frames the polar coefficient
is strongly negative at low
and becomes close to zero at high
, while the azimuthal coefficient
is close to zero at low
, and becomes slightly negative at higher
. The frame-independent coefficient
is strongly negative at all
in all frames. The data are compared to the theoretical predictions provided by nonrelativistic quantum chromodynamics models.
Adare, A.*; 今井 憲一; 永宮 正治; 谷田 聖; PHENIX Collaboration*; 他385名*
Physical Review C, 93(5), p.051902_1 - 051902_8, 2016/05
被引用回数:42 パーセンタイル:91.60(Physics, Nuclear)Measurements of the anisotropic flow coefficients ,
,
, and
, for identified particles (
,
, and
) at midrapidity, obtained relative to the event planes
at forward rapidities in Au + Au collisions at
200 GeV, are presented as a function of collision centrality and particle transverse momenta
. The
coefficients show characteristic patterns consistent with hydrodynamical expansion of the matter produced in the collisions. For each harmonic
, a modified valence quark-number
scaling [plotting
versus transverse kinetic energies
] is observed to yield a single curve for all the measured particle species for a broad range of
. A simultaneous blast-wave model fit to the observed
coefficients and published particle spectra identifies radial flow anisotropies
and spatial eccentricities
at freeze-out. These are generally smaller than the initial-state participant-plane geometric eccentricities
as also observed in the final eccentricity from quantum interferometry measurements with respect to the event plane.
佐々木 侑輝*; 江川 弘行; 長谷川 勝一; 早川 修平; 細見 健二; 市川 裕大; 今井 憲一; 佐甲 博之; 佐藤 進; 杉村 仁志; et al.
JPS Conference Proceedings (Internet), 8, p.022013_1 - 022013_4, 2015/09
A hypernuclear -ray spectroscopy experiment (E13) will be performed using
beam at the K1.8 beam line of the J-PARC Hadron Experimental Facility in 2015. In this experiment, we will determine the
value of the
spin-flip transition of the ground state doublet in
to investigate the magnetic moment of a
hyperon in nuclei. In order to check the performance of the whole spectrometer system of E13, a commissioning run was performed at the K1.8 beam line in 2013. We confirmed that the E13 setup is almost ready for the next beam time in 2015. In particular, new detectors for suppressing events from the two main
decay modes in the on-line and off-line analyses are installed. As a result, the signal to noise ratio of
spectra is drastically improved, and the sensitivity to the
measurement is expected to increase.
菊池 満; Fasoli, A.*; 滝塚 知典*; Diamond, P. H.*; Medvedev, S.*; Wu, Y.*; Duan, X.*; 岸本 泰明*; 花田 和明*; Pueschel, M. J.*; et al.
Proceedings of 8th IAEA Technical Meeting on Steady State Operation of Magnetic Fusion Devices (CD-ROM), 20 Pages, 2015/05
D型形状でHモード運転の標準的なトカマクは優れた閉じ込め性能を示すものの、過渡的、定常的な熱負荷の問題で大きな課題を持っている。これらを解決する方法として将来を見据えた幅ひろい考え方として形状制御を用いて熱制御を緩和する方式について講演する。