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Experimental setup and procedure for the measurement of the 7Be(n,α)α reaction at n_TOF

Cosentino, L. and Musumarra, A. and Barbagallo, M. and Pappalardo, A. and Colonna, N. and Damone, L. and Piscopo, M. and Finocchiaro, P. and Maugeri, E. and Heinitz, S. and Rauscher, T. and [et al.], . (2016) Experimental setup and procedure for the measurement of the 7Be(n,α)α reaction at n_TOF. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 830. pp. 197-205.

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Abstract

The newly built second experimental area EAR2 of the n_TOF spallation neutron source at CERN allows to perform (n, charged particles) experiments on short-lived highly radioactive targets. This paper describes a detection apparatus and the experimental procedure for the determination of the cross-section of the 7 Be(n,α)α reaction, which represents one of the focal points toward the solution of the cosmological Lithium abundance problem, and whose only measurement, at thermal energy, dates back to 1963. The apparently unsurmountable experimental difficulties stemming from the huge  7 Be γ-activity, along with the lack of a suitable neutron beam facility, had so far prevented further measurements. The detection system is subject to considerable radiation damage, but is capable of disentangling the rare reaction signals from the very high background. This newly developed setup could likely be useful also to study other challenging reactions requiring the detectors to be installed directly in the neutron beam.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0168-9002
e-ISSN:1872-9576
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:29 Jan 2018 15:12
Deposited On:29 Jan 2018 15:12

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