Properties of collective oblate bands in Pb nuclei
- Lawrence Livermore National Laboratory, CA (United States)
Strongly populated bands of fast {Delta}I = 1 transitions have been identified recently in the neutron deficient lead nuclei {sup 192,194,196-201}Pb. Many of these bands display regularly Increasing {gamma}-ray energies with increasing spin, while others have irregular {gamma}-ray energy patterns. The dipole character of the intense inband transitions is measured; when internal conversion coefficients can be deduced from intensity balances, they indicate that the transitions are of Ml multipolarity. The distinguishing features of these bands include large B(Ml)/B(E2) ratios ({approx} 20 {mu}{sup 2}/e{sup 2}b{sup 2}), low moments of inertia, and little signature splitting. DSAM measurements for regular bands in {sup 197,198} Pb give reduced B(M1) and B(E2) strengths of {approx}1 W.u. and - 15 W.u., respectively. These bands are interpreted as moderately collective oblate bands with {vert_bar}{beta}{vert_bar}{approx} 0.1. Properties of these bands may be understood within the framework of the tilted axis cranking model. The systematics of these bands are discussed, along with recent results. The impact of new powerful detector arrays on our experimental understanding of these interesting structures will be discussed briefly.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 386913
- Report Number(s):
- CONF-931044-; ISSN 0003-0503; TRN: 96:026848
- Journal Information:
- Bulletin of the American Physical Society, Vol. 38, Issue 9; Conference: Fall meeting of the Division of Nuclear Physics of the American Physical Society, Pacific Grove, CA (United States), 20-23 Oct 1993; Other Information: PBD: Oct 1993
- Country of Publication:
- United States
- Language:
- English
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