Abstract
A particle-gamma angular correlation study using the reactions 30Si(p, p'γ) 30Si and 30Si(α, α'γ) 30Si has enabled spin and parity assignments to be made in 30Si up to an excitation energy of 7.9 MeV. Major electromagnetic decay modes have been established for levels up to 8.6 MeV, the more complex cases by a proton-gamma coincidence method using the 27Al(α, pγ) 30Si reaction. Spin and parity assignments have been made for levels at 4809 (2 +), 4830 (3 +), 5230 (3 +), 5280 (4 +), 5487 (3 −), 5612 (2+), 5951 (4 +), 6503 (2 −, 4 −), 6537 (2 +), 6745 (1 −), 6865 (2 −, 3 +) 6914 (2 +), 7044 (3 −, 5 −), 7223 (4 +), 7256 (2 +), 7610 (2 +) and 7899 keV (2 +). A new level is proposed at 7590±10 keV. Multipole mixing ratios have been measured for most of the observed decay modes. The results are discussed in terms of collective and shell-model excitations.
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