TWO-PROTON RADIOACTIVITY: THE INTERESTING CASE OF Kr-67 AND FURTHER STUDIES

Giovinazzo, J.; Goigoux, T.; Blank, B.; Ascher, P.; Gerbaux, M.; Grevy, S.; Kurtukian-Nieto, T.; Magron, C.; Doornenbal, P.; Fukuda, N.; Inabe, N.; Kiss, G.; Kubo, T.; Kubono, S.; Nishimura, S.; Sakurai, H.; Shimizu, Y.; Sidong, C.; Soderstrom, P.; Sumikama, T.; Suzuki, H.; Takeda, H.; Vi, P.; Wu, J.; Ahn, D.; Agramunt, J.; Algora, A.; Guadilla, V.; Montaner-Piza, A.; Morales, A.; Orrigo, S.; Rubio, B.; Fujita, Y.; Tanaka, M.; Gelletly, W.; Aguilera, P.; Molina, F.; Diel, F.; Lubos, D.; de Angelis, G.; Napoli, D.; Borcea, C.; Boso, A.; Cakirli, Rabia; Ganioglu, Ela; Chiba, J.; Nishimura, D.; Oikawa, H.; Takei, Y.; Yagi, S.; Wimmer, K.; de France, G.; Go, S.; Brown, B.

doi:10.5506/aphyspolb.51.577

TWO-PROTON RADIOACTIVITY: THE INTERESTING CASE OF Kr-67 AND FURTHER STUDIES

Giovinazzo J., Goigoux T., Blank B., Ascher P., Gerbaux M., Grevy S., ...More

ACTA PHYSICA POLONICA B, vol.51, no.3, pp.577-585, 2020 (SCI-Expanded)

Publication Type: Article / Article
Volume: 51 Issue: 3
Publication Date: 2020
Doi Number: 10.5506/aphyspolb.51.577
Journal Name: ACTA PHYSICA POLONICA B
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Central & Eastern European Academic Source (CEEAS), Compendex, INSPEC, zbMATH
Page Numbers: pp.577-585
Istanbul University Affiliated: Yes

Abstract

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.