Natural nickel as a proton beam energy monitor for energies ranging from 15 to 30 MeV

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:443

Article

Mastren, Tara^1,2  Vermeulen, Christiaan¹  Brugh, Mark¹  Birnbaum, Eva R.¹  Nortier, Meiring F.¹  Fassbender, Michael E.¹ 

[1] Los Alamos Natl Lab, Chem Div, POB 1663, Los Alamos, NM 87545 USA

[2] Univ Utah, Nucl Engn Program, Dept Civil & Environm Engn, 110 Cent Campus Dr,Suite 2000b, Salt Lake City, UT 84112 USA

关键词: Proton beam;    Beam energy;    Monitor reactions;    Ni-57;    Co-57;   

DOI  :  10.1016/j.nimb.2019.01.038

来源: Elsevier

【 摘 要 】

The degradation of proton beam energy within a target stack was monitored via product nuclide ratios at the Los Alamos Isotope Production Facility (LANL-IPF). Nuclear reaction channels employed as energy monitors included Ni-Nat(p,x)Co-57 and Ni-Nat(p,x)Ni-57. Natural nickel foils (thicknesses 0.025 mm) were used to determine proton beam energies ranging from 15 to 30 MeV. Energy values were estimated from a fitted Ni-57/Co-57 production activity ratio curve, which, in turn, was calculated from formation cross section data. Isotope production yields in the low energy C slot at LANL-IPF are very sensitive to beam energy, and differences of several MeV can translate into a drastic effect on overall production yields and radiochemical purity. Proton energies determined in this target stack position using nickel foils will serve as a basis to optimize radionuclide production in terms of product yield maximization and by-product minimization.

【 授权许可】

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