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., & 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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