TY  - JOUR
AU  - n_TOF Collaboration (Cosentino, L. et al
AU  - Domingo-Pardo, C.
AU  - Tain, J. L.
AU  - Tarifeño-Saldivia, A.
PY  - 2016
DA  - 2016//
TI  - Experimental setup and procedure for the measurement of the Be-7(n,alpha)alpha reaction at n_TOF
T2  - Nucl. Instrum. Methods Phys. Res. A
JO  - Nuclear Instruments & Methods in Physics Research A
SP  - 197
EP  - 205
VL  - 830
PB  - Elsevier Science Bv
KW  - Cosmological lithium problem
KW  - Big bang nucleosynthesis
KW  - Be-7(n
KW  - alpha)alpha reaction
KW  - n_TOF spallation neutron source
AB  - The newly built second experimental area EAR2 of then 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 Be-7(n,alpha)alpha 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 Be-7 gamma-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.
SN  - 0168-9002
UR  - http://arxiv.org/abs/1604.00181
UR  - https://doi.org/10.1016/j.nima.2016.05.089
DO  - 10.1016/j.nima.2016.05.089
LA  - English
N1  - WOS:000381530300027
ID  - n_TOFCollaborationCosentino_etal2016
ER  -