beta-decay half-life of Kr-70: A bridge nuclide for the rp process beyond A=70 - art. no. 035801

Authors
Oinonen, M Aysto, J Jokinen, A Baumann, P Didierjean, F Huck, A Knipper, A Ramdhane, M Walter, G Huyse, M Van Duppen, P Marguier, G Novikov, Y Popov, A Seliverstov, DM Schatz, H
Citation
M. Oinonen et al., beta-decay half-life of Kr-70: A bridge nuclide for the rp process beyond A=70 - art. no. 035801, PHYS REV C, 6103(3), 2000, pp. 5801
Citations number
30
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW C-NUCLEAR PHYSICS
ISSN journal
05562813 → ACNP
Volume
6103
Issue
3
Year of publication
2000
Database
ISI
SICI code
0556-2813(200003)6103:3<5801:BHOKAB>2.0.ZU;2-B
Abstract
The beta-decay half-life of Kr-70 has been measured for the first time at t he ISOLDE PSB Facility at CERN. Mass separated Kr-70 ions were produced by 1 GeV proton-induced spallation reactions in a Nb foil. The measured half-l ife is 57(21) ms. This value is consistent with the half-life calculated as suming a pure Fermi decay, but is clearly lower than the value used in a re cent rp-process reaction flow calculation. The result shows that the reacti on flow via two-proton-capture of Se-68 is 2.5 times faster than previously calculated assuming an astrophysical temperature of 1.5 GK and a density o f 10(6) g/cm(3).