Elsevier

Nuclear Physics A

Volume 212, Issue 3, 1 October 1973, Pages 429-447
Nuclear Physics A

High-spin states in the N = 50 isotones 91Nb and 93Tc populated in (α, p2nγ) reactions

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Abstract

The reaction (α, p2nγ) on 90Zr and 92Mo targets was used to populate excited states in 91Nb and 93Tc, respectively. The de-excitation of these states was studied by in-beam γ-ray spectroscopy. The γ-ray transitions belonging to these nuclei were identified by studying coincidences with charged particles, excitation functions and γ-γ coincidences. Angular distribution and lifetime measurements were also performed. Many new levels were observed, particularly in 93Tc. They are interpreted in terms of shell-model calculations as belonging to the (g92)3and (p12) (g92)4 proton configurations.

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    Present address: Institute for Atomic Physics, Bucharest, Romania.

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