Development of a kinematically focused neutron source with the p(7Li,n)7Be inverse reaction
| Autor: | B. Leniau, D. Verney, M. Lebois, Andreas Oberstedt, J. N. Wilson, I. Matea, P. Halipre, Stephan Oberstedt |
|---|---|
| Přispěvatelé: | Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Physics
Bonner sphere Nuclear and High Energy Physics Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Neutron scattering [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 7. Clean energy Neutron time-of-flight scattering Neutron temperature Nuclear physics Neutron cross section Neutron source Neutron detection Neutron Nuclear Experiment Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2014, 735, pp.145-151. ⟨10.1016/j.nima.2013.07.061⟩ Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2014, 735, pp.145-151. ⟨10.1016/j.nima.2013.07.061⟩ |
| ISSN: | 0168-9002 1872-9576 |
| Popis: | Directional beams of neutrons can be produced, if a nuclear reaction, which emits neutrons, is initiated in inverse kinematics with a heavy ion projectile bombarding a light target. In this paper we investigate the use of the p(7Li,n)7Be inverse reaction to produce kinematically focused, quasi-mono-energetic neutron beams with a view to develop such an unusual neutron source for fundamental and applied nuclear physics studies. An experiment was carried out to validate the concept and to test the viability of two types of hydrogen-rich solid targets: polypropylene and TiH2. Neutron time-of-flight/energy spectra at 3 m distance from the source have been measured at 7Li bombarding energies of 13.5, 15, 15.5, 16, and 17 MeV, and neutron backgrounds from parasitic reactions have been characterized. The neutron angular distribution in the laboratory has been measured at 15 MeV. A Monte-Carlo code based on two-body relativistic kinematics has been developed and validated by comparison with the experimental data. Code-based extrapolations have then been used to deduce neutron energy spectra and maximum neutron fluxes available for future irradiation of samples placed in the neutron beam at small distances. For neutrons produced with thin View the MathML source and thick View the MathML source polypropylene targets the maximum available fluxes are calculated to be 107n/s/sr and 7×107 n/s/sr respectively. The development of a dedicated facility to produce kinematically focused neutrons is discussed. |
| Databáze: | OpenAIRE |
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