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First spectroscopic study of $$^{51}$$Ar by the ($$p$$,2$$p$$) reaction

($$p$$,2$$p$$)反応による初の$$^{51}$$Ar分光学研究

Juh$'a$sz, M. M.*; Elekes, Z.*; Sohler, D.*; 宇都野 穣  ; 吉田 数貴  ; 大塚 孝治*; 緒方 一介*; Doornenbal, P.*; Obertelli, A.*; 馬場 秀忠*; Browne, F.*; Calvet, D.*; Ch$^a$teau, F.*; Chen, S.*; 千賀 信幸*; Corsi, A.*; Cort$'e$s, M. L.*; Delbart, A.*; Gheller, J.-M.*; Giganon, A.*; Gillibert, A.*; Hilaire, C.*; Isobe, T.*; 小林 俊雄*; 久保田 悠樹*; Lapoux, V.*; 本林 透*; Murray, I.*; 大津 秀暁*; Panin, V.*; Paul, N.*; Rodriguez, W.*; 櫻井 博儀*; 笹野 匡紀*; Steppenbeck, D.*; Stuhl, L.*; Sun, Y. L.*; 栂野 泰宏*; 上坂 友洋*; Wimmer, K.*; 米田 健一郎*; Achouri, N. L.*; Aktas, O.*; Aumann, T.*; Chung, L. X.*; Dombr$'a$di, Zs.*; Flavigny, F.*; Franchoo, S.*; Ga$v{s}$pari$'c$, I.*; Gerst, R.-B.*; Gibelin, J.*; Hahn, K. I.*; Kim, D.*; 小岩井 拓真*; 近藤 洋介*; Koseoglou, P.*; Lee, J.*; Lehr, C.*; Linh, B. D.*; Liu, H. N.*; Lokotko, T.*; MacCormick, M.*; Moschner, K.*; 中村 隆司*; Park, S. Y.*; Rossi, D.*; Sahin, E.*; S$"o$derstr$"o$m, P.-A.*; 武内 聡*; T$"o$rnqvist, H.*; Vaquero, V.*; Wagner, V.*; Wang, S.*; Werner, V.*; Xu, X.*; 山田 啓貴*; Yan, D.*; Yang, Z.*; 安田 昌弘*; Zanetti, L.*

Juh$'a$sz, M. M.*; Elekes, Z.*; Sohler, D.*; Utsuno, Yutaka; Yoshida, Kazuki; Otsuka, Takaharu*; Ogata, Kazuyuki*; Doornenbal, P.*; Obertelli, A.*; Baba, Hidetada*; Browne, F.*; Calvet, D.*; Ch$^a$teau, F.*; Chen, S.*; Chiga, Nobuyuki*; Corsi, A.*; Cort$'e$s, M. L.*; Delbart, A.*; Gheller, J.-M.*; Giganon, A.*; Gillibert, A.*; Hilaire, C.*; Isobe, T.*; Kobayashi, Toshio*; Kubota, Yuki*; Lapoux, V.*; Motobayashi, Toru*; Murray, I.*; Otsu, Hideaki*; Panin, V.*; Paul, N.*; Rodriguez, W.*; Sakurai, Hiroyoshi*; Sasano, Masaki*; Steppenbeck, D.*; Stuhl, L.*; Sun, Y. L.*; Togano, Yasuhiro*; Uesaka, Tomohiro*; Wimmer, K.*; Yoneda, Kenichiro*; Achouri, N. L.*; Aktas, O.*; Aumann, T.*; Chung, L. X.*; Dombr$'a$di, Zs.*; Flavigny, F.*; Franchoo, S.*; Ga$v{s}$pari$'c$, I.*; Gerst, R.-B.*; Gibelin, J.*; Hahn, K. I.*; Kim, D.*; Koiwai, Takuma*; Kondo, Yosuke*; Koseoglou, P.*; Lee, J.*; Lehr, C.*; Linh, B. D.*; Liu, H. N.*; Lokotko, T.*; MacCormick, M.*; Moschner, K.*; Nakamura, Takashi*; Park, S. Y.*; Rossi, D.*; Sahin, E.*; S$"o$derstr$"o$m, P.-A.*; Takeuchi, Satoshi*; T$"o$rnqvist, H.*; Vaquero, V.*; Wagner, V.*; Wang, S.*; Werner, V.*; Xu, X.*; Yamada, Hiroki*; Yan, D.*; Yang, Z.*; Yasuda, Masahiro*; Zanetti, L.*

($$p$$,$$2p$$)反応と$$gamma$$線分光を用いて$$^{51}$$Arの束縛状態と非束縛状態の核構造研究を行った。実験結果と殻模型計算を比較することで、2つの束縛状態と6つの非束縛状態を決定した。$$^{51}$$Arの束縛状態を生成する反応断面積が小さいことから、これは中性子数32, 34の顕著なsub-shell closureが存在している確かな証拠と解釈できる。

The nuclear structure of $$^{51}$$Ar was studied by the ($$p$$,2$$p$$) reaction using $$gamma$$-ray spectroscopy for the bound and unbound states. Comparing the results to our shell-model calculations, two bound and six unbound states were established. The low cross sections populating the two bound states of $$^{51}$$Ar could be interpreted as a clear signature for the presence of significant sub-shell closures at neutron numbers 32 and 34 in argon isotopes.

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パーセンタイル:79.03

分野:Astronomy & Astrophysics

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