TWO-PROTON RADIOACTIVITY: THE INTERESTING CASE OF Kr-67 AND FURTHER STUDIES
Date
2020Author
Kurtukian-Nieto, T.
Nishimura, D.
Oikawa, H.
Takei, Y.
Yagi, S.
Wimmer, K.
de France, G.
Go, S.
Brown, B. A.
Ganioglu, E.
Kubono, S.
Nishimura, S.
Sakurai, H.
Shimizu, Y.
Algora, A.
Guadilla, V.
Montaner-Piza, A.
Morales, A. I.
Orrigo, S. E. A.
Rubio, B.
Fujita, Y.
Tanaka, M.
Gelletly, W.
Aguilera, P.
Molina, F.
Diel, F.
Lubos, D.
de Angelis, G.
Sumikama, T.
Suzuki, H.
Takeda, H.
Vi, P.
Wu, J.
Ahn, D. S.
Agramunt, J.
Sidong, C.
Soderstrom, P. -A.
Giovinazzo, J.
Goigoux, T.
Blank, B.
Ascher, P.
Gerbaux, M.
Grevy, S.
Magron, C.
Doornenbal, P.
Fukuda, N.
Inabe, N.
Kiss, G. G.
Kubo, T.
Napoli, D.
Borcea, C.
Boso, A.
Cakirli, R. B.
Chiba, J.
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Show full item recordAbstract
We report on the observation of Kr-67 that has been produced in an experiment performed at the RIKEN/BigRIPS facility. The two-proton decay of Kr-67 has been evidenced and this nucleus is thus the fourth observed long lived ground-state two-proton emitter, after Fe-45, Ni-48 and Zn-54. In addition, the decay of several isotopes in the mass region has been investigated. While for previous cases of two-proton radioactivity, the theoretical models could reproduce the measured data, this is not the case anymore for Kr-67. Two interpretations have been proposed to explain this discrepancy: a transition between real two-proton and sequential decay or the influence of deformation. These hypotheses will be tested in future experiments by measuring the angular and energy correlations of the emitted protons.
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