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

Cita com:
hdl:2117/88936
Document typeArticle
Defense date2016-09-11
Rights accessOpen Access
Except where otherwise noted, content on this work
is licensed under a Creative Commons license
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Attribution-NonCommercial-NoDerivs 3.0 Spain
ProjectDATOS NUCLEARES PARA FISICA NUCLEAR E INGENIERIA NUCLEAR (MICINN-FPA2008-04972-C03-03)
CHANDA - solving CHAllenges in Nuclear DAta (EC-FP7-605203)
CHANDA - solving CHAllenges in Nuclear DAta (EC-FP7-605203)
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 7Be(n,a)a 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 dif¿culties stemming from the huge 7Be ¿-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.
CitationCosentino, L., Musumarra, A., Barbagallo, M., Calviño, F., Casanovas, A., Cortes, G., Riego, A., Tarifeño, A. Experimental setup and procedure for the measurement of the 7Be(n,alpha)alpha reaction at n_TOF. "Nuclear instruments and methods in physics research. Section A, accelerators SP", 11 Setembre 2016, vol. 830, p. 197-205.
ISSN0168-9002
Publisher versionhttp://www.sciencedirect.com/science/article/pii/S016890021630482X
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