ISSN:
1434-601X
Keywords:
23.20.Lv
;
23.20.Ck
;
27.50.+ e
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Using methods of in-beam spectroscopy in connection with 35 MeV7Li bombardment of82Se targets four new isomers have been identified. They are observed in83Br at 3070 keV (T1/2=0.6±0.2 μs), in85Rb at 2826 keV (T1/2=12.5±0.6 ns), in85Kr at 1991 keV (T1/2=1.2+ 0.4 1.0 μs) and in86Kr at 2250 keV (T1/2=3.1±0.6 ns). Spin and parity 19/2− have been assigned to the new isomer in85Rb that is interpreted as the coupling of a p3/2 proton to the g 9 2/−2 two-neutron excitation of the N=48 neutron system. Using the TDPAD method an upper limit for the g-factor of ¦g¦≦0.17 has been estimated for this isomer. The same two-neutron excitation is also believed to be responsible for the new isomer in83Br. The new isomers in85Kr and86Kr are interpreted as configurations containing the two-proton excitation (f 5 2/−1 , p 3 2/−1 ) where in the isomeric 17/2+ level of85Kr an additional g9/2 neutron hole is involved.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01292578
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