Abstract
Nanosecond lifetimes of low-lying levels in the doubly odd nucleus122Sb have been measured. On the basis of these results and of already published experimental material, spins and parities for most of the low-lying states are proposed.
A simple theoretical description of this nucleus is presented. The model used is that of a proton coupled to a number projected neutron quasiparticle wave function, assuming aZ=N=50 core. The spectrum and transition rates were calculated in a shell model space consisting of eight subshells and using a renormalized Schiffer interaction. The shell model parameters were derived from adjadent nuclei.
Good agreement with the experimental level scheme is found. Also the gamma decay properties can be accounted for rather well. Spectroscopic factors for the one-neutron transfer reactions leading to122Sb are predicted. Their measurement with high resolution techniques would be a helpful test for the interpretations given.
Nuclear Reactions Sb(n, γ),E=th; measuredγ-γ coin.122Sb deducedJ,π,γ-branching, mean life.124Sb deduced mean life. Natural target, Ge(Li), NaI(Tl) detectors.
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We are grateful to the staff of the research reactor in Garching for their services and good cooperation.
We thank Dr. K. Allaart and Prof. Dr. E. Boeker for a critical reading of the manuscript and for their continuing interest. This investigation is partially supported by the Stichting voor Fundamenteel Onderzoek der Materie (F.O.M.), which is financially supported by the Nederlandse Organisatie voor Zuiver Wetenschappelijk Onderzoek (Z.W.O.).
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van Gunsteren, W.F., Rabenstein, D. Properties of the low-lying levels of122Sb. Z Physik A 282, 55–64 (1977). https://doi.org/10.1007/BF01881006
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DOI: https://doi.org/10.1007/BF01881006