Delaunay, F. and Achouri, N. L. and Algora, A. and Assié, M. and Balibrea, J. (2019) Study of multi-neutron emission in the β-decay of 11Li. Il nuovo cimento C, 42 (2-3). pp. 1-4. ISSN 1826-9885
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Abstract
The kinematics of two-neutron emission following the β-decay of 11Li 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 9Li. A large cross-talk rejection rate is obtained (> 95%) over most of the energy range of interest. Application to 11Li 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 11Be.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 01 Dec 2020 08:31 |
| Last Modified: | 01 Dec 2020 08:31 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/20500 |
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