|
|||||
|
|
Isomers of astrophysical interest in neutron-deficient nuclei at masses A = 81, 85 and 86 |
|
| Authors: | A Kankainen G K Vorobjev S A Eliseev W Huang J Huikari A Jokinen A Nieminen Yu N Novikov H Penttilä A V Popov S Rinta-Antila H Schatz D M Seliverstov Yu P Suslov J Äystö |
| Institution: | 1. Department of Physics, University of Jyv?skyl?, P.O. Box 35, FIN-40014, Finland 2. St. Petersburg State University, 198904, St. Petersburg, Russia 3. Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia 4. GSI, Postfach 110552, D-64291, Darmstadt, Germany 5. Michigan State University, 48824, East Lansing, MI, USA |
| Abstract: | Decay properties of neutron-deficient exotic nuclei close to A=80 have been investigated at the IGISOL facility. The studied nuclei, 81Y, 81Sr, 81mKr, 85Nb, 85Zr, 86Mo and 86Nb, were produced by a 32S beam from the Jyv?skyl? isochronous cyclotron on 54Fe and natNi targets. The internal conversion coefficient for a 190.5 keV isomeric transition in 81mKr has been measured and the internal transition rate has been determined. The internal transition rate has been used to estimate a neutrino capture rate on 81Br, which yields a log ft of 5.13±0.09 for the reaction 81Br( ν, e -)81mKr. A new isomer with a half-life of 3.3±0.9 s has been observed in 85Nb. The existence of an earlier reported isomer with a half-life of 56 s in 86Nb has not been confirmed. |
| Keywords: | 21 10 Tg Lifetimes 23 20 Nx Internal conversion and extranuclear effects 27 50 +e 59 ⩽ A ⩽ 89 |
| 本文献已被 SpringerLink 等数据库收录！ | |