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|Title:||Energy-broadened proton beam for production of quasi-stellar neutrons from the 7Li(p,n)7Be reaction|
|Authors:||FEINBERG G.; SHOR A.; BERKOVITS D; EISEN Y.; FRIEDMAN M; GIORGINIS Georgios; HIRSH T.; KRASA ANTONIN; PAUL M.; PLOMPEN Arjan; TSUK E.|
|Citation:||JOURNAL OF PHYSICS: CONFERENCE SERIES vol. 337 p. 012044|
|Publisher:||INSTITUTE OF PHYSICS|
|Type:||Articles in periodicals and books|
|Abstract:||Production of quasi-stellar neutrons by the 7Li(p,n)7Be reaction has been used for measuring s-process cross sections and efforts to upgrade the proton beam intensity with RF linear accelerators are presently ongoing. We investigated the effect of an energy-broadened proton beam, as is expected for a RF linear accelerator, on the produced 25-keV semi-Maxwellian neutron spectrum and compared it to that of a Van de Graaff accelerator with well-defined proton energy. Neutron spectrum measurements from 0○ to 80○ were carried out with a pulsed proton beam at the IRMM Van de Graaff accelerator using time-of-flight techniques, both with a narrow energy spread (sigma≈1.5 keV) proton beam and with an energy-broadened beam (sigma≈20 keV) obtained by straggling through a Au-foil degrader. In the latter case, the neutron spectrum is closer to the Maxwellian flux distribution in the high neutron energy region.|
|JRC Directorate:||Health, Consumers and Reference Materials|
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