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Title: Cross-section measurements and production of 72Se with medium to high energy protons using arsenic containing targets

Journal Article · · Radiochimica Acta

Here, experiments were performed to evaluate production of 72Se, parent radionuclide of the positron emitter 72As, at high energy at the Brookhaven Linac Isotope Producer (BLIP). Excitation functions for 75As(p, xn)72/75Se in the 52-105 MeV energy range were measured by irradiating thin gallium arsenide (GaAs) wafers. Maximum cross section value for the natAs(p, 4n)72Se reaction in the energy range was 103 ± 9 mb at 52 ± 1 MeV. Production size GaAs and arsenic metal (As°) targets were irradiated with 136 μA and 165 μA beam current possessing an initial Linac energy of 117 MeV. A total of 3.77 ± 0.1 GBq (102 ± 3 mCi) of 72Se was produced from a GaAs target at a calculated target entrance energy of 105.4 MeV, and 13.8 ± 0.3 GBq (373 ± 8 mCi) of 72Se from an As° target at a calculated incident energy of 49.5 MeV irradiated for 116.5 h and 68.9 h, respectively.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Grant/Contract Number:
SC0012704
OSTI ID:
1485257
Report Number(s):
BNL--209663-2018-JAAM
Journal Information:
Radiochimica Acta, Journal Name: Radiochimica Acta Journal Issue: 4 Vol. 107; ISSN 0033-8230
Publisher:
de GruyterCopyright Statement
Country of Publication:
United States
Language:
English

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