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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)197-205
Number of pages9
JournalNuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment
Volume830
Early online date24 May 2016
DOIs
Publication statusPublished - 11 Sept 2016

Keywords

  • Be(n,α)α reaction
  • Big bang nucleosynthesis
  • Cosmological lithium problem
  • n-TOF spallation neutron source

Research Beacons, Institutes and Platforms

  • Dalton Nuclear Institute

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