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Closed Access item Searching for the H-5 resonance in the t+n+n system
Chulkov, L. V.
García Borge, María José
Elze, Th. W.
Kratz, J. V.
Richter, Achim W.
|Keywords:||Nuclear Reactions C(6He,nt), (6He,2nt), E=240 MeV/nucleon, Measured, triton and neutron relative energy spectra, energy and angular correlations, 4,5H deduced, resonance features, Hyperspherical harmonic expansion analysis, Comparisons with previous results, [PACS] Properties of specific nuclei listed by mass ranges: A ≤ 5, [PACS] Breakup and momentum distributions|
|Citation:||Nuclear Physics A 723(1-2): 13–31 (2003)|
|Abstract:||The unbound hydrogen isotopes H-4,H-5 have been studied in the one-proton knockout channel of He-6 (240 MeV/u) impinging on a carbon target. The triton fragments originating from this channel were detected in coincidence with neutrons. Relative energy spectra as well as energy and angular correlations have been studied for the t+n and t+n+n systems. The analysis of the energy and angular correlations by the method of hyperspherical harmonic expansion allows to determine the relative weights of the most relevant partial waves in the three-body t+n+n final state. It is shown that the neutrons to a large extent occupy the p-shell and that the I-π = 1/2(+) state is strongly populated as expected for the H-5 ground state. No evidence for a narrow resonance in the t+n+n system is obtained, instead a broad structure peaked at 3 MeV above the threshold with about 6 MeV as a full width at half maximum is observed. The two-body t+n system reveals a resonance compatible with earlier results for H-4.|
|Description:||19 pages, 7 figures, 2 tables, 2 appendices.-- PACS nrs.: 27.10.+h; 25.60.Gc.-- Printed version published Jul 28, 2003.|
Erratum to this paper (error in the calculation of resonance parameters) published in Nuclear Physics A 739(3-4): 353-354 (2004), http://dx.doi.org/10.1016/j.nuclphysa.2004.04.115
|Publisher version (URL):||http://dx.doi.org/10.1016/S0375-9474(03)01312-5|
|Appears in Collections:||(CFMAC-IEM) Artículos|
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