Temperature-tuned Maxwell–Boltzmann neutron spectra for kT ranging from 30 up to 50keV for nuclear astrophysics studies

The need of neutron capture cross section measurements for astrophysics motivates present work, where calculations to generate stellar neutron spectra at different temperatures are performed. The accelerator-based 7Li(p,n)7Be reaction is used. Shaping the proton beam energy and the sample covering a...

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Bibliographic Details
Published in:Applied radiation and isotopes 2012-08, Vol.70 (8), p.1583-1589
Main Authors: Martín-Hernández, G., Mastinu, P.F., Praena, J., Dzysiuk, N., Capote Noy, R., Pignatari, M.
Format: Article
Language:English
Subjects:
7Li(p,n)7Be
Accelerator-based neutron source
MACS
Neutron activation
Nuclear astrophysics
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Summary:The need of neutron capture cross section measurements for astrophysics motivates present work, where calculations to generate stellar neutron spectra at different temperatures are performed. The accelerator-based 7Li(p,n)7Be reaction is used. Shaping the proton beam energy and the sample covering a specific solid angle, neutron activation for measuring stellar-averaged capture cross section can be done. High-quality Maxwell–Boltzmann neutron spectra are predicted. Assuming a general behavior of the neutron capture cross section a weighted fit of the spectrum to Maxwell–Boltzmann distributions is successfully introduced. ► We expand the use of the accelerator-based 7Li(p,n)7Be reaction for astrophysics. ► High-quality stellar (Maxwell–Boltzmann) neutron spectra are calculated. ► Easy control of the proton beam shape can produce the desired neutron spectrum. ► Weighted fit increases accuracy in settling on the neutron spectrum temperature.
ISSN:0969-8043
1872-9800
DOI:10.1016/j.apradiso.2012.05.004