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Title

Study of multi-neutron emission in the β-decay of 11Li

AuthorsDelaunay, F.; Achouri, N.L.; Algora, Alejandro ; Assié, M.; Balibrea, J.; Banerjee, K.; Bhattacharya, C.; García Borge, María José ; Cano-Ott, D.; Fernández-Domínguez, B.; Fraile, Luis M. ; Gibelin, J.; Lund, M.V.; Madurga, M.; Marqués, F.M.; Marroquín, I. ; Martínez, T.; Mendoza, E.; Orr, N.A.; Pârlog, M.; Pereira-López, X.; Pestel, V.; Riisager, K.; Santos, C.; Sénoville, M.; Tengblad, Olof ; Vedia, V.
Issue Date23-Aug-2019
PublisherSocietà Italiana di Fisica
CitationNuovo Cimento della Societa Italiana di Fisica C 42: 98 (2019)
AbstractThe kinematics of two-neutron emission following the β-decay of Li was investigated for the first time by detecting the two neutrons in coincidence and by measuring their angle and energy. An array of liquid-scintillator neutron detectors was used to reject cosmic-ray and γ-ray backgrounds by pulse-shape discrimination. Cross-talk events in which two detectors are fired by a single neutron were rejected using a filter tested on the β-1n emitter Li. A large cross-talk rejection rate is obtained (> 95%) over most of the energy range of interest. Application to Li data leads to a significant number of events interpreted as β-2n decay. A discrete neutron line at ≈ 2 MeV indicates sequential two-neutron emission, possibly from the unbound state at 10.6 MeV excitation energy in Be.
Description4 pags., 1 fig. -- Open Access funded by Creative Commons Atribution Licence 4.0
Publisher version (URL)http://dx.doi.org/10.1393/ncc/i2019-19098-5
URIhttp://hdl.handle.net/10261/208785
DOI10.1393/ncc/i2019-19098-5
Identifiersdoi: 10.1393/ncc/i2019-19098-5
issn: 1826-9885
Appears in Collections:(CFMAC-IEM) Artículos
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