Abstract
Four resonances in the55Mn(p, γ)56 Fe reaction at the centre-of-mass proton beam energy E CMP =1320, 1504, 1508 and 1649 keV were studied. Angular distributions for some strong γ-rays following the radiative decay of the resonances were measured and analysed in terms of the channel-spin formalism. Spin-parity assignmentI πr =3+, 4+ and 3+ was acquired for the 1320, 1504 and 1649 keV resonances, respectively. No definite assignment was established for the 1508 keV resonance and the resonance is assumed to be a very tight multiplet. Analysis of primary transitions to bound states of the Fe final nucleus permited us to assign these states. The 2+, 2+, 2+, 6+ and 4+ assignments were ascribed to the states at excitation energyE x =5705, 5303, 4738, 4692 and 4658 keV, respectively, while for the 5132 keV state ambiguous assignment 3+ or 4+ was found. Multipole mixing ratioδ was established for some primaries. The coupling of angular momenta of proton and target nucleus in the formation of the 3+ resonances was also roughly discussed.
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Participated partly in the course of his work on diploma thesis.
The authors wish to thank the staff of the Van de Graaff accelerator at Charles University in Prague for the efficient operation of the machine. One of us (M. X. T.) acknowledges the staff of the Dept. of Nuclear Physics of Charles University, Prague, for the excellent working conditions.
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Trung, M.X., Lipták, J., Štěrba, F. et al. Angular distributions of γ-rays from four resonances of the55Mn(p, γ)56Fe reaction. Czech J Phys 42, 499–512 (1992). https://doi.org/10.1007/BF01605220
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DOI: https://doi.org/10.1007/BF01605220