JAEA
  • help
  • PC | SP
  • JP | EN
          
検索対象：     
報告書番号：
※ 半角英数字
 年 ～ 
 年
全てクリア
検索結果：　3 件中 1件目～3件目を表示
  • 1

発表形式

Initialising ...

選択項目を絞り込む

掲載資料名

Initialising ...

発表会議名

Initialising ...

筆頭著者名

Initialising ...

キーワード

Initialising ...

発表言語

Initialising ...

発行年

Initialising ...

開催年

Initialising ...

選択した検索結果をダウンロード

論文

Excited states in the neutron rich nuclei $$^{46}$$S and $$^{47}$$S

Begala, M.*; 宇都野 穣; 他85名*

Acta Physica Polonica B; Proceedings Supplement, 18(2), p.2A-17-1 - 2A-17-7, 2025/04

https://doi.org/10.5506/APhysPolBSupp.18.2-A17
 被引用回数：0 パーセンタイル：0.00(Physics, Multidisciplinary)

理化学研究所RIBFにて中性子過剰核$$^{46}$$Sと$$^{47}$$Sの励起状態を生成し、そこからの脱励起ガンマ線を観測した。$$^{46}$$Sについては新たに1500keV、2700keVのガンマ線を、$$^{47}$$Sについても1本のガンマ線を観測した。今後殻模型計算との比較から、どの状態が観測されたのかなどについて議論する予定である。

論文

Spectroscopy of deeply bound orbitals in neutron-rich Ca isotopes

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

https://doi.org/10.1016/j.physletb.2024.138828
 被引用回数：3 パーセンタイル：67.63(Astronomy & Astrophysics)

We report on the first measurement of unbound states in $$^{53}$$Ca and $$^{55}$$Ca, populated from $$^{54,56}$$Ca$$(p,pn)$$ reactions. Orbital angular momentum $$l$$ assignments were extracted from momentum distributions calculated with the distorted wave impulse approximation (DWIA). The resonances at 5516(41) keV in $$^{53}$$Ca and 6000(250) keV in $$^{55}$$Ca indicate a significant $$l$$ = 3 component, providing the first experimental evidence for the $$nu 0f_{7/2}$$ 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 $$nu 0f_{7/2}$$ orbital in $$^{55}$$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.

論文

Observation of a Be double-Lambda hypernucleus in the J-PARC E07 experiment

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

https://doi.org/10.1093/ptep/pty149
 被引用回数：31 パーセンタイル：83.12(Physics, Multidisciplinary)

A double-$$Lambda$$ hypernucleus, $${}_{LambdaLambda}mathrm{Be}$$, was observed by the J-PARC E07 collaborationin nuclear emulsions tagged by the $$(K^{-},K^{+})$$ reaction. This event was interpreted as a production and decay of $$ {}_{LambdaLambda}^{;10}mathrm{Be}$$,$${}_{LambdaLambda}^{;11}mathrm{Be}$$, or $${}_{LambdaLambda}^{;12}mathrm{Be}^{*}$$ via $$Xi^{-}$$ capture in $${}^{16}mathrm{O}$$.By assuming the capture in the atomic 3D state, the binding energy of two $$Lambda$$ hyperons$$,$$($$B_{LambdaLambda}$$)of these double-$$Lambda$$ hypernuclei are obtained to be$$15.05 pm 0.11,mathrm{MeV}$$, $$19.07 pm 0.11,mathrm{MeV}$$, and $$13.68 pm 0.11,mathrm{MeV}$$, respectively. Based on the kinematic fitting, $${}_{LambdaLambda}^{;11}mathrm{Be}$$ is the most likely explanation for the observed event.

3 件中 1件目～3件目を表示
  • 1