Half-lives of Sr 73 and y 76 and the consequences for the proton dripline

L. Sinclair*, R. Wadsworth, J. Dobaczewski, A. Pastore, G. Lorusso, H. Suzuki, D. S. Ahn, H. Baba, F. Browne, P. J. Davies, P. Doornenbal, A. Estrade, Y. Fang, N. Fukuda, J. Henderson, T. Isobe, D. G. Jenkins, S. Kubono, Z. Li, D. LubosS. Nishimura, I. Nishizuka, Z. Patel, S. Rice, H. Sakurai, Y. Shimizu, P. Schury, H. Takeda, P. A. Söderström, T. Sumikama, H. Watanabe, V. Werner, J. Wu, Z. Y. Xu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


The half-lives of seven nuclei have been determined in the neutron-deficient mass-70 region following their production via fragmentation of a 345 MeV/nucleon Xe124 primary beam on a 740 mg/cm2 Be9 target at the RI Beam Factory, RIKEN. The results include two new (Sr73 and Y76) half-lives and a more precise measurement for the ground-state half-life of Sr74. The new results are discussed with reference to previously published calculations that predict the location of the proton dripline in the light Sr and Y region of the nuclear chart. In addition, differences in the ground-state structure of Rb72 and Y76 are discussed with the aid of density functional theory calculations. These provide a possible explanation for why Rb72 undergoes proton decay while the α-conjugate nucleus Y76 predominantly undergoes β+ decay.

Original languageEnglish
Article number044311
Number of pages7
JournalPhysical Review C
Issue number4
Publication statusPublished - 16 Oct 2019

Bibliographical note

©2019 American Physical Society. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

Cite this