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  • Population of bound excited states in intermediate-energy fragmentation reactions
    Obertelli, A; Gade, A; Bazin, D; Campbell, C M; Cook, J M; Cottle, P D; Davies, A D; D -C Dinca; Glasmacher, T; Hansen, P G; Hoagland, T; Kemper, K W; J -L Lecouey; Mueller, W F; Reynolds, R R; Roeder, B T; Terry, J R; Tostevin, J A; Yoneda, K; Zwahlen, H

    arXiv.org, 03/2006
    Paper

    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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