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Closed Access item Searching for the H-5 resonance in the t+n+n system

Authors:Meister, M.
Chulkov, L. V.
Simon, H.
Aumann, T.
García Borge, María José
Elze, Th. W.
Emling, H.
Geissel, H.
Hellström, M.
Jonson, B.
Kratz, J. V.
Kulessa, R.
Leifels, Y.
Markenroth, K.
Münzenberg, G.
Nickel, F.
Nilsson, T.
Nyman, G.
Pribora, V.
Richter, Achim W.
Riisager, K.
Scheidenberger, C.
Schrieder, G.
Tengblad, Olof
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
Issue Date:17-Apr-2003
Publisher:Elsevier
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
URI:http://hdl.handle.net/10261/7426
ISSN:0375-9474
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Appears in Collections:(CFMAC-IEM) Artículos

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