- V. Paar (Univ. Zagreb) - Structure of low-lying levels in
/sup 91/Rb and /sup 93/Rb.
- Accession Number
- 002810455
- Author
- Sistemich
K. Kawade
K. Lawin
H. Lhersonneau
G. Ohm
H. Paffrath
U. Lopac
V. Brant
S. Paar
V.
- Institution
- Inst. fur Kernphys., KFA Julich, West Germany.
- Title
- Structure of low-lying levels in /sup 91/Rb and /sup 93/Rb.
- Source
- Zeitschrift fur Physik a (Atomic Nuclei), vol.325, no.2, 1986, pp.139-47.
West Germany.
- Country of Publication
- West Germany.
- Abstract
- Lifetimes of low-lying levels in /sub 37//sup 91/Rb/sub 54/ and /sub
37//sup 93/Rb/sub 56/ have been determined from beta /sup -/- gamma
coincidence measurements at the fission-product separator JOSEF. Values of
t/sub 1/2/=17.0(8) ns and 2.0(2) ns have been obtained for the levels at
1134 keV in /sup 91/Rb and 267 keV in /sup 93/Rb, respectively, and upper
limits could be deduced for several other states. Calculations in the frame
of IBFM/PTQM have been performed for /sup 91/Rb, the results of which allow
an interpretation of the low-lying levels of this nucleus. For the 1134 keV
level the configuration ( pi g/sub 9/2/(X)2/sup +/)7/2/sup +/ is suggested
which lies close to or even below the 9/2/sub 1//sup +/ level. The
calculated half-life of 14 ns for the 1134 keV level reproduces well the
experimental value. The half-life of the 267 keV level in /sup 93/Rb favours
the assignment of I/sup pi /=1/2/sup -/ to this state over the alternative
3/2/sup -/. (27 References).
- Abstract Number
- A87019205
- Subject Headings
- Nuclear
collective states and giant resonances. Nuclear
energy level lifetimes. Nuclear
energy levels. Nuclear
spin and parity. Nuclei
with mass number 90 to 149.
- Key Phrase Identifiers
- level
lifetimes; spin
assignments; parity
assignments; level
structure; /sup
91/Rb; /sup
93/Rb; low-lying
levels; IBFM/PTQM;
half-life.
- Classification Codes
- Nuclear spin, parity, and isobaric spin [A2110H]; Nuclear level density
and structure [A2110M]; Collective structure in nuclear levels [A2110R];
Lifetimes and transition probabilities of nuclei [A2320C]; Properties of
nuclei with 90
- Treatment
- Experimental.
- CODEN
- ZAANEE
- Language
- English.
- ISSN
- 0930-1151.
- Publication Type
- Journal Paper.
- Update Code
- 198700.