Lifetime measurements of strongly deformed rotational bands in {sup 133}Pm

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.54.1057· OSTI ID:383318

Galindo-Uribarri, A; Ward, D; Andrews, H R; Ball, G C; Radford, D C; Janzen, V P ^[1]; Mullins, S M; Waddington, J C ^[2]; Afanasjev, A V; Ragnarsson, I ^[3]

---

1. Atomic Energy of Canda Limited, Chalk River Laboratories, Chalk River, Ontario, K0J 1J0 (CANADA)
2. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, L8S 4M1 (CANADA)
3. Department of Mathematical Physics, Lund. Institute of Technology, P.O. Box 118, S-221 00 Lund (Sweden)

We have measured lifetimes and deduced deformation parameters for rotational bands in {sup 133}Pm by the Doppler-shift attenuation method. A strongly coupled band based on the configuration with a hole in the {ital g}{sub 9/2} orbital has deformation parameter {beta}{sub 2}=0.40 (5), which is comparable to or larger than typical superdeformed bands in the {ital A}{approximately}130 region. We observe this band in {sup 133}Pm down to its {ital I}={ital K}=9/2 bandhead. Calculations with a configuration-dependent shell correction to the cranked Nilsson potential can explain the existence of such low-spin superdeformed structures in the {ital A}{approximately}130 region. These shapes, which also occur in {sup 129,131}Pr, can be observed experimentally because of relatively low-lying shell gaps for {beta}{sub 2}=0.4 near {ital Z}=58, {ital N}=72. No high-spin intruder orbitals ({upsilon}{ital i}{sub 13/2}) are occupied (over the spin range observed), however the strongly deformation-driving properties of a hole in the extruder {pi}{ital g}{sub 9/2} orbital appear to be an essential ingredient in lowering the energy of the superdeformed shape. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 383318
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 54; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CRANKING MODEL
DEFORMED NUCLEI
DOPPLER EFFECT
LIFETIME
PRASEODYMIUM 129
PRASEODYMIUM 132
PROMETHIUM 133
ROTATIONAL STATES
SHAPE
SUPERDEFORMED NUCLEI