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Different mechanism of two-proton emission from proton-rich nuclei Al-23 and Mg-22
Ma, YG; Fang, DQ; Sun, XY; Zhou, P; Togano, Y; Aoi, N; Baba, H; Cai, XZ; Cao, XG; Chen, JG; Fu, Y; Guo, W; Hara, Y; Honda, T; Hu, ZG; Ieki, K; Ishibashi, Y; Ito, Y; Iwasa, N; Kanno, S; Kawabata, T; Kimura, H; Kondo, Y; Kurita, K; Kurokawa, M; Moriguchi, T; Murakami, H; Ooishi, H; Okada, K; Ota, S; Ozawa, A; Sakurai, H; Shimoura, S; Shioda, R; Takeshita, E; Takeuchi, S; Tian, WD; Wang, HW; Wang, JS; Wang, M; Yamada, K; Yamada, Y; Yasuda, Y; Yoneda, K; Zhang, GQ; Motobayashi, T
2015
Source PublicationPHYSICS LETTERS B
Volume743Pages:306—309
Subtype期刊文献
AbstractTwo-proton relative momentum (q(pp)) and opening angle (theta(pp)) distributions from the three-body decay of two excited proton-rich nuclei, namely Al-23 --> p + p + Na-21 and Mg-22 --> p + p + Ne-20, have been measured with the projectile fragment separator (RIPS) at the RIKEN RI Beam Factory. An evident peak at q(pp) similar to 20 MeV/c as well as a peak in theta(pp) around 30 degrees are seen in the two-proton break-up channel from a highly-excited Mg-22. In contrast, such peaks are absent for the Al-23 case. It is concluded that the two-proton emission mechanism of excited Mg-22 is quite different from the Al-23 case, with the former having a favorable diproton emission component at a highly excited state and the latter dominated by the sequential decay process. (C) 2015 The Authors. Published by Elsevier B.V.
KeywordRadioactivity State Decay
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/24429
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Ma, YG,Fang, DQ,Sun, XY,et al. Different mechanism of two-proton emission from proton-rich nuclei Al-23 and Mg-22[J]. PHYSICS LETTERS B,2015,743:306—309.
APA Ma, YG.,Fang, DQ.,Sun, XY.,Zhou, P.,Togano, Y.,...&Motobayashi, T.(2015).Different mechanism of two-proton emission from proton-rich nuclei Al-23 and Mg-22.PHYSICS LETTERS B,743,306—309.
MLA Ma, YG,et al."Different mechanism of two-proton emission from proton-rich nuclei Al-23 and Mg-22".PHYSICS LETTERS B 743(2015):306—309.
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