Confirmation of the Shears Mechanism in Near-Spherical Tin Nuclei

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.500· OSTI ID:365877

Jenkins, D G; Wadsworth, R; Hibbert, I M; Parry, C M ^[1]; Cameron, J A ^[2]; Clark, R M; Kruecken, R; Lee, I Y; Macchiavelli, A O ^[3]; Fossan, D B; Lane, G J; Sears, J M; Smith, J F ^[4]; Janzen, V P ^[5]; Frauendorf, S ^[6]

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1. Department of Physics, University of York, Heslington, York Y01 5DD (United Kingdom)
2. Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, (Canada) L85 4M1
3. Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
4. Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3800 (United States)
5. Chalk River Laboratories, AECL Research, Chalk River, Ontario, K0J 1J0 (CANADA)
6. FZ Rossendorf, Postfach 510119, D-01314 Dresden (Germany)

Lifetimes of states of a magnetic dipole band in each of the nuclei {sup 106,108}Sn have been obtained using the Doppler shift attenuation method. The deduced B(M1) transition rates show the characteristic behavior associated with the shears mechanism. A simplified semiclassical analysis yields B(M1) values in qualitative agreement with those expected for previously assigned configurations. The results suggest extremely low deformations for these dipole structures. In particular, the {sup 106}Sn band appears to be the first example of almost pure magnetic rotation in a spherical nucleus. {copyright} {ital 1999} {ital The American Physical Society }

• Research Organization: Lawrence Berkeley National Laboratory
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 365877
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

1-NITROSO-2-NAPHTHOL
66 PHYSICS
DEFORMED NUCLEI
DOPPLER EFFECT
LIFETIME
NUCLEAR DEFORMATION
SEMICLASSICAL APPROXIMATION
TIN
TIN 106
TIN 108