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Population of bound excited states in intermediate-energy fragmentation reactions

A. Obertelli·A. Gade·D. Bazin·C. M. Campbell·J. M. Cook·P. D. Cottle·A. D. Davies·D. -C. Dinca·T. Glasmacher·P. G. Hansen·T. Hoagland·K. W. Kemper·J. -L. Lecouey·W. F. Mueller·R. R. Reynolds·B. T. Roeder·J. R. Terry·J. A. Tostevin·K. Yoneda·H. Zwahlen
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Abstract

Fragmentation reactions with intermediate-energy heavy-ion beams exhibit a wide range of reaction mechanisms, ranging from direct reactions to statistical processes. We examine this transition by measuring the relative population of excited states in several sd-shell nuclei produced by fragmentation with the number of removed nucleons ranging from two to sixteen. The two-nucleon removal is consistent with a non-dissipative process whereas the removal of more than five nucleons appears to be mainly statistical.

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A. Obertelli, A. Gade, D. Bazin, C. M. Campbell, J. M. Cook, P. D. Cottle, A. D. Davies, D. -C. Dinca, T. Glasmacher, P. G. Hansen, T. Hoagland, K. W. Kemper, J. -L. Lecouey, W. F. Mueller, R. R. Reynolds, B. T. Roeder, J. R. Terry, J. A. Tostevin, K. Yoneda, H. Zwahlen. 2006-03-14. Population of bound excited states in intermediate-energy fragmentation reactions. https://doi.org/10.1103/physrevc.73.044605

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