Proton-proton correlations in distinguishing the two-proton emission mechanism of $^{23}$Al and $^{22}$Mg

D. Q. Fang; Y. G. Ma; X. Y. Sun; P. Zhou; Y. Togano; N. Aoi; H. Baba; X. Z. Cai; X. G. Cao; J. G. Chen; Y. Fu; W. Guo; Y. Hara; T. Honda; Z. G. Hu; K. Ieki; Y. Ishibashi; Y. Ito; N. Iwasa; S. Kanno; T. Kawabata; H. Kimura; Y. Kondo; K. Kurita; M. Kurokawa; T. Moriguchi; H. Murakami; H. Ooishi; K. Okada; S. Ota; A. Ozawa; H. Sakurai; S. Shimoura; R. Shioda; E. Takeshita; S. Takeuchi; W. D. Tian; H. W. Wang; J. S. Wang; M. Wang; K. Yamada; Y. Yamada; Y. Yasuda; K. Yoneda; G. Q. Zhang; T. Motobayashi

doi:10.1103/physrevc.94.044621

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arXiv · 1610.04731

Proton-proton correlations in distinguishing the two-proton emission mechanism of $^{23}$Al and $^{22}$Mg

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Abstract

The proton-proton momentum correlation functions ($C_{pp}(q)$) for kinematically complete decay channels of $^{23}$Al $\rightarrow$ p + p + $^{21}$Na and $^{22}$Mg $\rightarrow$ p + p + $^{20}$Ne have been measured at the RIKEN RI Beam Factory. From the very different correlation strength of $C_{pp}(q)$ for $^{23}$Al and $^{22}$Mg, the source size and emission time information were extracted from the $C_{pp}(q)$ data by assuming a Gaussian source profile in the correlation function calculation code (CRAB). The results indicated that the mechanism of two-proton emission from $^{23}$Al was mainly sequential emission, while that of $^{22}$Mg was mainly three-body simultaneous emission. By combining our earlier results of the two-proton relative momentum and the opening angle, it is pointed out that the mechanism of two-proton emission could be distinguished clearly.

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D. Q. Fang, Y. G. Ma, X. Y. Sun, P. Zhou, Y. Togano, N. Aoi, H. Baba, X. Z. Cai, X. G. Cao, J. G. Chen, Y. Fu, W. Guo, Y. Hara, T. Honda, Z. G. Hu, K. Ieki, Y. Ishibashi, Y. Ito, N. Iwasa, S. Kanno, T. Kawabata, H. Kimura, Y. Kondo, K. Kurita, M. Kurokawa, T. Moriguchi, H. Murakami, H. Ooishi, K. Okada, S. Ota, A. Ozawa, H. Sakurai, S. Shimoura, R. Shioda, E. Takeshita, S. Takeuchi, W. D. Tian, H. W. Wang, J. S. Wang, M. Wang, K. Yamada, Y. Yamada, Y. Yasuda, K. Yoneda, G. Q. Zhang, T. Motobayashi. 2016-10-15. Proton-proton correlations in distinguishing the two-proton emission mechanism of $^{23}$Al and $^{22}$Mg. https://doi.org/10.1103/physrevc.94.044621

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