Different mechanism of two-proton emission from proton-rich nuclei 23Al and 22Mg. Ma, Y.; Fang, D.; Sun, X.; Zhou, P; Togano, Y; Aoi, N; Baba, H; Cai, X.; Cao, X.; Chen, J.; Fu, Y; Guo, W; Hara, Y; Honda, T; Hu, Z.; 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, W.; Wang, H.; Wang, J.; Wang, M; Yamada, K.; Yamada, Y; Yasuda, Y; Yoneda, K; Zhang, G.; and Motobayashi, T Phys. Lett. B, 743:306--309, Elsevier, apr, 2015.
Different mechanism of two-proton emission from proton-rich nuclei 23Al and 22Mg [link]Paper  doi  abstract   bibtex   
Two-proton relative momentum (qpp) and opening angle ($\theta$pp) distributions from the three-body decay of two excited proton-rich nuclei, namely Al23→p+p+Na21 and Mg22→p+p+Ne20, have been measured with the projectile fragment separator (RIPS) at the RIKEN RI Beam Factory. An evident peak at qpp 20MeV/c as well as a peak in $\theta$pp around 30° are seen in the two-proton break-up channel from a highly-excited 22Mg. In contrast, such peaks are absent for the 23Al case. It is concluded that the two-proton emission mechanism of excited 22Mg is quite different from the 23Al case, with the former having a favorable diproton emission component at a highly excited state and the latter dominated by the sequential decay process.
@article{Ma2015,
abstract = {Two-proton relative momentum (qpp) and opening angle ($\theta$pp) distributions from the three-body decay of two excited proton-rich nuclei, namely Al23→p+p+Na21 and Mg22→p+p+Ne20, have been measured with the projectile fragment separator (RIPS) at the RIKEN RI Beam Factory. An evident peak at qpp 20MeV/c as well as a peak in $\theta$pp around 30° are seen in the two-proton break-up channel from a highly-excited 22Mg. In contrast, such peaks are absent for the 23Al case. It is concluded that the two-proton emission mechanism of excited 22Mg is quite different from the 23Al case, with the former having a favorable diproton emission component at a highly excited state and the latter dominated by the sequential decay process.},
author = {Ma, Y.G. and Fang, D.Q. and Sun, X.Y. and Zhou, P and Togano, Y and Aoi, N and Baba, H and Cai, X.Z. and Cao, X.G. and Chen, J.G. and Fu, Y and Guo, W and Hara, Y and Honda, T and Hu, Z.G. and Ieki, K and Ishibashi, Y and Ito, Y and Iwasa, N and Kanno, S and Kawabata, T and Kimura, H and Kondo, Y and Kurita, K and Kurokawa, M and Moriguchi, T and Murakami, H and Ooishi, H and Okada, K and Ota, S and Ozawa, A and Sakurai, H and Shimoura, S and Shioda, R and Takeshita, E and Takeuchi, S and Tian, W.D. and Wang, H.W. and Wang, J.S. and Wang, M and Yamada, K. and Yamada, Y and Yasuda, Y and Yoneda, K and Zhang, G.Q. and Motobayashi, T},
doi = {10.1016/j.physletb.2015.02.066},
issn = {03702693},
journal = {Phys. Lett. B},
month = {apr},
pages = {306--309},
publisher = {Elsevier},
title = {{Different mechanism of two-proton emission from proton-rich nuclei 23Al and 22Mg}},
url = {http://linkinghub.elsevier.com/retrieve/pii/S0370269315001574},
volume = {743},
year = {2015}
}
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