Title: Experimental setup and procedure for the measurement of the 7Be(n,α)α reaction at n_TOF
Authors: COSENTINO LuigiMUSUMARRA A.BARBAGALLO M.PAPPALARDO AlfioCOLONNA N.DAMONE L.PISCOPO M.FINOCCHIARO PaoloMAUGERI E.HEINITZ S.SCHUMANN D.DRESSLER R.KIVEL NikoABERLE O.ANDRZEJEWSKI J.AUDOUIN L.AYRANOV M.BACAK M.BALIBREA-CORREA J.BARROS S.BECARES V.BEINRUCKER C.BERTHOUMIEUX E.BILLOWES J.BOSNAR D.BRUGGER M.Becvár F.CAAMANO M.CALVIANI M.CALVIÑO F.CANO-OTT D.CARDELLA R.CASANOVAS A.CASTELLUCCIO D. M.CERUTTI F.CHEN Y. H.CHIAVERI E.CORTES G.CORTES-GIRALDO M. A.DIAKAKI M.DOMINGO-PARDO C.DUPONT E.DURAN I.FERNANDEZ-DOMINGUEZ B.FERRARI A.FERREIRA P.FURMAN W.GANESAN S.GARCIA-RIOS A.GAWLIK A.GHEORGHE I.GLODARIU T.GONZALEZ-ROMERO E.GONÇALVES I.GRIESMAYER E.GUERRERO C.GUNSING F.GÖBEL K.HARADA H.HEFTRICH T.HEYSE JANJENKINS D. G.JERICHA E.KATABUCHI T.KAVRIGIN P.KIMURA A.KOKKORIS M.Krticka M.KÄPPELER F.LEAL-CIDONCHA E.LEDERER C.LEEB H.LERENDEGUI J.LO MEO S.LONSDALE S.LOSITO R.MACINA D.MARGANIEC J.MARTÍNEZ T.MASSIMI C.MASTINU P.MASTROMARCO M.MATTEUCCI F.MAZZONE A.MENDOZA E.MENGONI A.MILAZZO P. M.MINGRONE F.MIREA M.MONTESANO S.NOLTE R.OPREA A.PATRONIS N.PAVLIK AndreasPERKOWSKI J.PRAENA J.QUESADA J.RAJEEV K.RAUSCHER T.REIFARTH R.RIEGO A.ROUT PRUBBIA C.RYAN J.SABATA-GILARTE M.SAXENA A.SCHILLEBEECKX PeterSCHMIDT S.SEDYSHEV P.SMITH A. G.STAMATOPOULOS A.TAGLIENTE G.TAIN J. L.TARIFENO-SALDIVIA A.TASSAN-GOT L.TSINGANIS A.VALENTA S.VANNINI G.VARIALE V.VAZ P.VENTURA A.VLACHOUDIS V.VLASTOU R.VOLLAIRE J.WALLNER A.WARREN S.WEIGAND M.WEISS C.WOLF C.WOODS P. J.WRIGHT T. J.ZUGEC P.
Citation: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT vol. 830 p. 197-205
Publisher: ELSEVIER SCIENCE BV
Publication Year: 2016
JRC N°: JRC103549
ISSN: 0168-9002
URI: http://www.sciencedirect.com/science/article/pii/S016890021630482X
http://publications.jrc.ec.europa.eu/repository/handle/JRC103549
DOI: 10.1016/j.nima.2016.05.089
Type: Articles in periodicals and books
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.
JRC Directorate:Nuclear Safety and Security

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