Search for intermediate structure in 36Ar via the 24Mg(12C, α)32S reaction |
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Authors: | D Počanić R Čaplar G Vourvopoulos X Aslanoglou |
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Institution: | 1. Rudjer Bo?kovi? Institute, 41001 Zagreb, Croatia, Yugoslavia;2. Tandem Accelerator Laboratory, NRC Demokritos, Aghia Paraskevi-Attikis, Greece |
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Abstract: | The 24Mg(12C,α)32S reaction was investigated in the energy range Ec.m. = 11.9–19.4 MeV by measuring excitation functions of the α0 and α1 groups. Angular distributions (θc.m. = 12–97°) were also measured at a number of energies. The excitation functions were subjected to a statistical analysis by means of evaluating correlation and deviation functions; no statistically significant anomalies were found. The α0 angular distributions display fairly high angular-momentum selectivity as pairs of Legendre polynomials provide acceptable fits to most of them: however, only one, at Ec.m. = 18.1 MeV, is strongly dominated by a single partial wave, l = 11. Excitation functions as well as angular distributions of both α0 and α1 cross sections were found to be in good qualitative agreement with Hauser-Feshbach calculations throughout the energy range studied. Thus, the analysis of the data shows that intermediate resonant structures, if present, are weak and interfere strongly with the statistical compound-nucleus background, which effectively prevents their clear observation and identification in the present study. |
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Keywords: | Nuclear reactions |
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