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 Schumann, D. and Dressler, R. and Kivel, N. and Aberle, O. and Andrzejewski, J. and Audouin, L. and Ayranov, M. and Bacak, M. and Barros, S. and Balibrea-Correa, J. and Bécares, V. and Bečvář, F. and Beinrucker, C. and Berthoumieux, E. and Billowes, J. and Bosnar, Damir and Brugger, M. and Caamaño, M. and Calviani, M and Calviño, F. and Cano-Ott, D. and Cardella, R. and Casanovas, A. and Castelluccio, D. M. and Cerutti, F and Chen, Y. H. and Chiaveri, E. and Cortés, G. and Cortés-Giraldo, M. A. and Diakaki, M. and Domingo-Pardo, C. and Dupont, E. and Duran, I. and Fernandez-Dominguez, B. and Ferrari, A. and Ferreira, P. and Furman, W. and Ganesan, S. and García-Rios, A. and Gawlik, A. and Gheorghe, I. and Glodariu, T. and Göbel, K. and Gonc̗alves, I. F. and González-Romero, E. and Griesmayer, E. and Guerrero, C. and Gunsing, F. and Harada, H. and Heftrich, T. and Heyse, J. and Jenkins, D. G. and Jericha, E. and Käppeler, F. and Katabuchi, T. and Kavrigin, P. and Kimura, A. and Kokkoris, M. and Krtička, M. and Leal-Cidoncha, E. and Lerendegui, J. and Lederer, C. and Leeb, H. and Lo Meo, S. and Lonsdale, S. and Losito, R. and Macina, D. and Marganiec, J. and Martínez, T. and Massimi, C. and Mastinu, P and Mastromarco, M. and Matteucci, F. and Mazzone, A. and Mendoza, E. and Mengoni, A. and Milazzo, P. M. and Mingrone, F. and Mirea, M. and Montesano, S. and Nolte, R. and Oprea, A. and Patronis, N. and Pavlik, A. and Perkowski, J. and Praena, J. and Quesada, J. and Rajeev, K. and Rauscher, T. and Reifarth, R. and Riego-Perez, A. and Rout, P. and Rubbia, C. and Ryan, J. and Sabate-Gilarte, M. and Saxena, A. and Schillebeeckx, P. and Schmidt, S. and Sedyshev, P. and Smith, A. G. and Stamatopoulos, A. and Tagliente, G. and Tain, J. L. and Tarifeño-Saldivia, A. and Tassan-Got, L. and Tsinganis, A. and Valenta, S. and Vannini, G. and Variale, V. and Vaz, P. and Ventura, A. and Vlachoudis, V. and Vlastou, R. and Vollaire, J. and Wallner, A. and Warren, S. and Weigand, M. and Weiß, C. and Wolf, C. and Woods, P. J. and Wright, T. and Žugec, Petar (n_TOF Collaboration) (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. ISSN 0168-9002

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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 7Be(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 7Be 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.

Item Type: Article
Keywords: cosmological lithium problem, Big bang nucleosynthesis, 7Be(n , α)α reaction, n_TOF spallation neutron source
Date: 11 September 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2016 The Authors. Published by Elsevier B.V. Open Access funded by CERN. Under a Creative Commons license CC-BY-NC-ND-4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/). Received 1 April 2016. Received in revised form 28 April 2016. Accepted 22 May 2016. Available online 24 May 2016.
Divisions: Faculty of Science > Department of Physics
Project code: IP-2013-11-1680
Publisher: Elsevier
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 30 Oct 2017 13:43
Last Modified: 30 Oct 2017 13:43
URI: http://digre.pmf.unizg.hr/id/eprint/5643

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