Production and β decay of rp-process nuclei Cd96, In98, and Sn100

D. Bazin, F. Montes, A. Becerril, G. Lorusso, A. Amthor, T. Baumann, H. Crawford, A. Estrade, A. Gade, T. Ginter, C. J. Guess, M. Hausmann, G. W. Hitt, P. Mantica, M. Matos, R. Meharchand, K. Minamisono, G. Perdikakis, J. Pereira, J. PinterM. Portillo, H. Schatz, K. Smith, J. Stoker, A. Stolz, R. G.T. Zegers

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The β-decay properties of the N=Z nuclei Cd96, In98, and Sn100 have been studied. These nuclei were produced at the National Superconducting Cyclotron Laboratory by fragmenting a 120MeV/nucleon Sn112 primary beam on a Be target. The resulting radioactive beam was filtered in the A1900 and the newly commissioned Radio Frequency Fragment Separator to achieve a purity level suitable for decay studies. The observed production cross sections of these nuclei are lower than predicted by factors of 10-30. The half-life of Cd96, which was the last experimentally unknown waiting point half-life of the astrophysical rp process, is 1.03-0.21+0.24s. The implications of the experimental T1/2 value of Cd96 on the abundances predicted by rp process calculations and the origin of A=96 isobars such as Ru96 are explored.

Original languageEnglish
Article number252501
JournalPhysical Review Letters
Issue number25
StatePublished - Dec 15 2008


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