Subnanosecond isomers in105, 107Sn
- 1 January 1995
- journal article
- Published by IOP Publishing in Physica Scripta
- Vol. T56 (T56) , 289-291
- https://doi.org/10.1088/0031-8949/1995/t56/051
Abstract
The lifetimes of excited states in 105,107Sn were measured using a plunger improved to cover a recoil distance up to 9.5 mm. In 105Sn, T1/2 (17/2+) = 0.38(5) ns and T1/2 (7/2+) = 0.33(8) ns. In 107Sn, T1/2 (17/2+) = 0.40(6) ns and T1/2 (7/2+) = 0.9(2) ns. The 7/2+ → 5/2+ M1 transitions are l-forbidden by a factor of about 102: B(M1) = 0.008 W.u. in 105Sn and B(M1) = 0.007 W.u. in 107Sn. From B(M1, 17/2+ → 15/2+) values major configurations of the 17/2+ and 15/2+1, 2 states were deduced as follows: | 17/2+ > ≈ vd5/2(vg7/2)26., | 15/2+1 > ≈ vg7/2(vd5/2)24. + some admixture of vd5/2(vg7/2)26., | 15/2+2 > ≈ [vd5/2(vg7/2)26.]15/2.Keywords
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