New cross sections for the 27Al(p,x)7Be nuclear process: Monitoring proton beam energy via the 22Na/7Be cross-section ratio between 45 and 200 MeV
1 Institute for Nuclear Research of the Hungarian Academy of Sciences, ATOMKI, 18/c Bem tér, 4026 Debrecen, Hungary
2 iThemba LABS, Faure, PO Box 722, Somerset West, 7129, South Africa
3 Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545, USA
a e-mail: email@example.com
Published online: 13 September 2017
Cross sections are presented for 7Be produced in the proton bombardment of natural Al up to 200 MeV and compared with previous literature data. Cross-section ratios for the 27Al(p,x)22Na and 27Al(p,x)7Be nuclear processes are also presented in the energy region 45−200 MeV, exploiting our previously reported cross sections for the 27Al(p,x)22Na process. The applicability for energy monitoring of proton beams by exploiting the 22Na/7Be cross-section ratio is discussed. Monte Carlo simulations in a simplified geometry provide additional information on activation of an Al monitor foil by secondary neutrons, indicating greater sensitivity to these neutrons by 24Na as a beam monitor than 22Na and 7Be.
© The Authors, published by EDP Sciences, 2017
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