Elsevier

Nuclear Physics A

Volume 249, Issue 2, 15 September 1975, Pages 239-252
Nuclear Physics A

The decay of 4 min 158Tm

https://doi.org/10.1016/0375-9474(75)90185-2Get rights and content

Abstract

The decay of 4 min 158Tm has been investigated with on-line mass-separated samples obtained from the Orsay ISOCELE separator. Measurements of γ-rays, conversion electron lines and γ-γ bi-dimensional coincidences were performed. About 180 transitions were ascribed to the decay and two thirds of them were placed in a decay scheme. The β-band and the γ-band were identified with bandheads situated at 806.40 and 820.13 keV respectively. In addition, a number of other vibrational bands (β-γ, β-β, Kπ = 0 and 1) are proposed. The decay properties of those bands are discussed in the framework of current nuclear models. The log ft values suggest a 2 assignment for 158Tm with the possible configuration (p404J↓-n521↑).

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