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Li, P. J.*; 宇都野 穣; 吉田 数貴; 他85名*
Physics Letters B, 855, p.138828_1 - 138828_11, 2024/08
被引用回数:2 パーセンタイル:74.11(Astronomy & Astrophysics)We report on the first measurement of unbound states in Ca and
Ca, populated from
Ca
reactions. Orbital angular momentum
assignments were extracted from momentum distributions calculated with the distorted wave impulse approximation (DWIA). The resonances at 5516(41) keV in
Ca and 6000(250) keV in
Ca indicate a significant
= 3 component, providing the first experimental evidence for the
single-particle strength of unbound hole states in the neutron-rich Ca isotopes. The observed excitation energies and cross-sections point towards extremely localized and well separated strength distributions, with some fragmentation for the
orbital in
Ca. These results are in good agreement with predictions from shell-model calculations using the effective GXPF1Bs interaction and ab initio calculations and diverge markedly from the experimental distributions in the nickel isotones at Z = 28.
江川 弘行; 足利 沙希子; 長谷川 勝一; 橋本 直; 早川 修平; 細見 健二; 市川 裕大; 今井 憲一; 金原 慎二*; 七村 拓野; et al.
Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.021D02_1 - 021D02_11, 2019/02
被引用回数:31 パーセンタイル:82.94(Physics, Multidisciplinary)A double- hypernucleus,
, was observed by the J-PARC E07 collaborationin nuclear emulsions tagged by the
reaction. This event was interpreted as a production and decay of
,
, or
via
capture in
.By assuming the capture in the atomic 3D state, the binding energy of two
hyperons
(
)of these double-
hypernuclei are obtained to be
,
, and
, respectively. Based on the kinematic fitting,
is the most likely explanation for the observed event.