Isomers of astrophysical interest in neutron-deficient nuclei at masses A = 81, 85 and 86
Kankainen, A., Vorobjev, G., Eliseev, S.A., Huang, W., Huikari, J., Jokinen, A., Nieminen, A., Novikov, Y., Penttilä, H., Popov, A., Rinta-Antila, S., Schatz, H., Seliverstov, D., Suslov, Yu.P., & Äystö, J. (2005). Isomers of astrophysical interest in neutron-deficient nuclei at masses A = 81, 85 and 86. European Physical Journal A, 25(3), 355-363. https://doi.org/10.1140/epja/i2005-10141-0
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© Società Italiana di Fisica and Springer-Verlag 2005
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 Jyväskylä 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.
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