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ratios of resonance states in
Be for deducing the
Be(
,
)
Li
reaction rate relevant to the cosmological lithium problem岩佐 直仁*; 石川 竣喜*; 久保野 茂*; 榊原 昂浩*; 小湊 和也*; 西尾 勝久; 松田 誠; 廣瀬 健太郎; 牧井 宏之; Orlandi, R.; et al.
Physical Review C, 103(1), p.015801_1 - 015801_5, 2021/01
被引用回数:2 パーセンタイル:23.09(Physics, Nuclear)The
Be(
He,
)
Be(
)
Li reaction was studied at
(
He)=30 MeV to deduce the branching ratios of
of resonant state at 18.91 - 20.1 MeV in
Be, which are necessary to extract the
Be(
,
)
Li
reaction rate relevant to the
Be destruction in the big bang nucleosynthesis, from the
Li(
,
)
Be reaction cross section. The decay protons from
Be
to the ground and first excited states in
Li were well-separately measured. The
ratio of the 19.235-MeV state was deduced to be 3.4
1.9%. The 19.86- and 20.1-MeV states were found to decay dominantly into the first excited and ground states of
Li, respectively.
Cs(
= 1.63 m) by ABMRPinard, J.*; Duong, H. T.*; Marescaux, D.*; Stroke, H. H.*; Redi, O.*; Gustafsson, M.*; Nilsson, T.*; Matsuki, S.*; 岸本 泰明*; Kominato, K.*; et al.
Nuclear Physics A, 753(1-2), p.3 - 12, 2005/05
被引用回数:4 パーセンタイル:35.25(Physics, Nuclear)磁場が原子核内で有限な分布を持つと超微細構造異常(ボーア ワイスコップ効果)が生じる。この効果を系統的に調べるためには、超微細構造定数と核磁気モーメントを系統的に高い精度で求める必要がある。本研究では、不安定核の超微細構造定数の精密測定のために、オンライン-レーザー光ポンピング原子線磁気共鳴装置を開発し、
Cs(
m)の基底状態6s
S
の超微細分岐
を求めた。その結果、
MHzを得た。