Barbagallo, M. (2016) 7Be(n,α) and 7Be(n,p) cross-section measurement for the Cosmological Lithium Problem at the n TOF facility at CERN. Il nuovo cimento C, 39 (2). pp. 1-8. ISSN 1826-9885
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Abstract
The 7Be(n,α) reaction cross-section has been measured for the first time in a wide neutron energy range, in order to investigate its role in the destruction of 7Be during Big Bang Nucleosynthesis, as a possible solution to the Cosmological Lithium problem (CLiP). The measurement has been performed at the new vertical beam line of the neutron Time-of-Flight facility (n TOF) at CERN, taking advantage of the extremely high instantaneous neutron flux which allows to obtain the useful signal-to-background ratio particularly suited for challenging measurements on short-lived radioisotopes, such as 7Be (t1/2 53.2 days). The two alfa particles emitted back-to-back in the reaction have been detected by mean of sandwiches of silicon detectors and exploiting the coincidence technique. In order to complete the n TOF program on CLiP, the 7Be(n,p) cross-section will be measured during the next n TOF experimental campaign, using an high-purity sample and a silicon telescope device.
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 29 Sep 2020 15:51 |
| Last Modified: | 29 Sep 2020 15:51 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/19274 |
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