Elsevier

Nuclear Physics A

Volume 224, Issue 3, 27 May 1974, Pages 517-536
Nuclear Physics A

Investigation of the 29Si(n, γ)30Si reaction with non-polarized and polarized thermal neutrons

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Abstract

The γ-radiation following capture of non-polarized as well as polarized thermal neutrons in 29Si has been investigated. All but one of the 56 γ-rays ascribed to the 29Si(n, γ) reaction could be placed into a 30Si decay scheme. The excitation energies of 21 bound states, three of which have not been reported previously, have been determined with 0.14 ± 0.8 keV errors. The spin and parity of the Ex = 8.16 MeV level have been determined as 1. The thermal-neutron capture cross sections of 28Si and 29Si are 160 ± 18 mb and 101 ± 14 mb, respectively. The (n, γ) reduced primary transition probabilities are strongly correlated with the (d, p) spectroscopic factors for ln(d, p) = 1 levels. A simple shell-model calculation supports the experimentally founded assumption that, in addition to the Ex = 8.16 MeV level, there are one or more other levels with Jπ = 1 and with rather large relative 2s12 2p12 strength.

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