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A Method to Obtain a Maxwell–Boltzmann Neutron Spectrum at kT = 30 keV for Nuclear Astrophysics Studies

Published online by Cambridge University Press:  05 March 2013

J. Praena ,
P. F. Mastinu  and
G. Martín Hernández
J. Praena*
Affiliation:
INFN-Laboratori Nazionali di Legnaro, Padova, Italy
P. F. Mastinu
Affiliation:
INFN-Laboratori Nazionali di Legnaro, Padova, Italy
G. Martín Hernández
Affiliation:
Centro de Aplicaciones Tecnologicas y Desarrollo Nuclear, La Habana, Cuba
*
CCorresponding author. Email: [email protected]
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Abstract

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A method to shape the neutron energy spectrum at low-energy accelerators is proposed by modification of the initial proton energy distribution. A first application to the superconductive RFQ of the SPES project at Laboratori Nazionali di Legnaro is investigated for the production of a Maxwell–Boltzmann neutron spectrum at kT = 30 keV via the 7Li(p, n)7Be reaction. Concept, solutions and calculations for a setup consisting of a proton energy shaper and a lithium target are presented. It is found that a power dentisity of 3 kW cm−2 could be sustained by the lithium target and a forward-directed neutron flux higher than 1010 s−1 at the sample position could be obtained. In the framework of the SPES project the construction of a LEgnaro NeutrOn Source (LENOS) for Astrophysics and for validation of integral nuclear data is proposed, suited for activation studies on stable and unstable isotopes.

Keywords

nuclear astrophysics, Maxwellian averaged cross sections, neutron production
Type
s-Process and n Capture
Information
Publications of the Astronomical Society of Australia , Volume 26 , Issue 3 , 2009 , pp. 225 - 231
Copyright
Copyright © Astronomical Society of Australia 2009

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