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Title: | Invariant mass spectrum and alpha-n correlation function studied in the fragmentation of He-6 on a carbon target |
Authors: | Aleksandrov, D.; Aumann, T.; Axelsson, L.; Baumann, T.; García Borge, María José ![]() ![]() ![]() |
Keywords: | Secondary radioactive beams Exotic nuclei Halo nuclei He-6 He-5 Momentum distributions Invariant mass spectra Fragmentation mechanism Breakup reactions [PACS] Reactions induced by unstable nuclei [PACS] Resonances [PACS] Properties of specific nuclei listed by mass ranges: 6 ≤ A ≤ 19 |
Issue Date: | 13-Apr-1998 |
Publisher: | Elsevier |
Citation: | Nuclear Physics A 633(2): 234-246 (1998) |
Abstract: | Momentum distributions and invariant mass spectra from the breakup of He-6 ions with an energy of 240 MeV/u interacting with a carbon target have been studied. The data were used to extract information about the reaction mechanism which is influenced by the structure of He-6. It is found that the dominant reaction mechanism is a two-step process: knock out of one neutron followed by the decay of the He-5 resonance. The shape of the (α+n) two-body invariant mass spectrum is interpreted as mainly reflecting the 5He ground state which is a J(π) = 3/2(-) resonance. However, no evidence for correlations between cu particles and neutrons is observed in the momentum widths of the distributions. It is demonstrated that a combined analysis of the two-body invariant mass spectrum and an appropriate correlation function may be used to determine the properties of the intermediate resonance. |
Description: | 13 pags, 5 figures.-- PACS nrs.: 24.60.−t; 25.70.Ef; 27.20.+n. |
Publisher version (URL): | http://dx.doi.org/10.1016/S0375-9474(98)00120-1 |
URI: | http://hdl.handle.net/10261/10231 |
DOI: | 10.1016/S0375-9474(98)00120-1 |
ISSN: | 0375-9474 |
Appears in Collections: | (CFMAC-IEM) Artículos |
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