https://doi.org/10.1140/epja/i2016-16101-7
Regular Article - Experimental Physics
Integral measurement of the 12C(n, p)12B reaction up to 10 GeV
1
Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
2
Istituto Nazionale di Fisica Nucleare, Bari, Italy
3
Istituto Nazionale di Fisica Nucleare, Bologna, Italy
4
ENEA, Bologna, Italy
5
Johann-Wolfgang-Goethe Universität, Frankfurt, Germany
6
Uniwersytet Łódzki, Lodz, Poland
7
Centre National de la Recherche Scientifique/IN2P3 - IPN, Orsay, France
8
Centro de Investigaciones Energeticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
9
Charles University, Prague, Czech Republic
10
European Commission JRC, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440, Geel, Belgium
11
CEA/Saclay - IRFU, Gif-sur-Yvette, France
12
University of Manchester, Oxford Road, Manchester, UK
13
CERN, Geneva, Switzerland
14
Universitat Politecnica de Catalunya, Barcelona, Spain
15
C2TN-Instituto Superior Tecníco, Universidade de Lisboa, Lisboa, Portugal
16
Universidad de Sevilla, Sevilla, Spain
17
INFN - Laboratori Nazionali del Sud, Catania, Italy
18
National Technical University of Athens (NTUA), Athens, Greece
19
Instituto de Física Corpuscular, CSIC-Universidad de Valencia, Valencia, Spain
20
Paul Scherrer Institut, 5232, Villigen, Switzerland
21
Universidade de Santiago de Compostela, Santiago de Compostela, Spain
22
Aristotle University of Thessaloniki, Thessaloniki, Greece
23
Bhabha Atomic Research Centre (BARC), Mumbai, India
24
Atominstitut der Österreichischen Universitäten, Technische Universität Wien, Wien, Austria
25
University of York, York, Heslington, UK
26
Karlsruhe Institute of Technology (KIT), Institut für Kernphysik, Karlsruhe, Germany
27
Dipartimento di Fisica, Università di Bologna, Sezione INFN di Bologna, Bologna, Italy
28
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, Italy
29
Istituto Nazionale di Fisica Nucleare, Trieste, Italy
30
Horia Hulubei National Institute of Physics and Nuclear Engineering - IFIN HH, Magurele, Romania
31
Dipartimento di Fisica e Astronomia DFA, Università di Catania and INFN-Laboratori Nazionali del Sud, Catania, Italy
32
University of Vienna, Faculty of Physics, Wien, Austria
33
Centre for Astrophysics Research, School of Physics, Astronomy and Mathematics, University of Hertfordshire, Hatfield, UK
34
Department of Physics, University of Basel, Basel, Switzerland
35
Research School of Physics and Engineering, Australian National University, ACT 0200, Canberra, Australia
* e-mail: pzugec@phy.hr
Received:
28
September
2015
Revised:
9
February
2016
Accepted:
24
February
2016
Published online:
22
April
2016
The integral measurement of the 12C(n, p)12B reaction was performed at the neutron time-of-flight facility n_TOF at CERN. The total number of 12B nuclei produced per neutron pulse of the n_TOF beam was determined using the activation technique in combination with a time-of-flight technique. The cross section is integrated over the n_TOF neutron energy spectrum from reaction threshold at 13.6MeV to 10GeV. Having been measured up to 1GeV on basis of the 235U(n, f ) reaction, the neutron energy spectrum above 200MeV has been re-evaluated due to the recent extension of the cross section reference for this particular reaction, which is otherwise considered a standard up to 200MeV. The results from the dedicated GEANT4 simulations have been used to evaluate the neutron flux from 1GeV up to 10GeV. The experimental results related to the 12C(n, p)12B reaction are compared with the evaluated cross sections from major libraries and with the predictions of different GEANT4 models, which mostly underestimate the 12B production. On the contrary, a good reproduction of the integral cross section derived from measurements is obtained with TALYS-1.6 calculations, with optimized parameters.
© SIF, Springer-Verlag Berlin Heidelberg, 2016