{pi}{ital h}{sub 11/2} intruder and {pi}{ital g}{sub 9/2}{sup {minus}1} strongly coupled bands in {sup 115}Sb
- Tata Institute of Fundamental Research, Bombay 400 005 (India)
High spin states have been populated in {sup 115}Sb with the reaction {sup 100}Mo({sup 19}F,4{ital n}){sup 115}Sb at a beam energy of 82 MeV. Two intruder rotational bands ({Delta}{ital I}=2) extending to spins 43/2{sup {minus}} and 51/2{sup {minus}} have been observed. The extracted relative {ital B}({ital E}2) value supports the nearly diabatic nature of these two bands. The transition energies in these two bands are nearly similar and the bands have a relative spin alignment of 4{h_bar} at low frequencies. The bands have been interpreted to be based on the {pi}{ital h}{sub 11/2} orbital coupled to the deformed 2{ital p}-2{ital h} states of the {sup 114}Sn core. Possible quasiparticle configurations for the excited negative parity band are discussed and it is suggested that this band is based on aligned {ital h}{sub 11/2} neutrons, the yrare extension of which is observed diabatically down to very low spin values. Two strongly coupled ({Delta}{ital I}=1) rotational bands involving the ({pi}{ital g}{sub 9/2}){sup {minus}1} configuration have been observed, of which the known strongly coupled band has been extended from 23/2{sup +} to 37/2{sup +} in spin and the extracted {ital B}({ital M}1;{ital I}{r_arrow}{ital I}{minus}1)/{ital B}({ital E}2;{ital I}{r_arrow}{ital I}{minus}2) values for this band are compared with the D{umlt o}nau-Frauendorf formula. Alignment features due to the {ital h}{sub 11/2} neutrons in the observed bands are compared with the core nucleus {sup 114}Sn and cranked shell model calculations. Equilibrium deformations for a range of odd Sb isotopes have been calculated with various intrinsic proton configurations. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 389417
- Journal Information:
- Physical Review, C, Vol. 54, Issue 5; Other Information: PBD: Nov 1996
- Country of Publication:
- United States
- Language:
- English
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