2018
DOI: 10.1016/j.nimb.2018.05.028
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Excitation functions for (p,x) reactions of niobium in the energy range of Ep = 40–90 MeV

Abstract: A stack of thin Nb foils was irradiated with the 100 MeV proton beam at Los Alamos National Laboratory's Isotope Production Facility, to investigate the 93 Nb(p,4n) 90 Mo nuclear reaction as a monitor for intermediate energy proton experiments and to benchmark state-of-the-art reaction model codes. A set of 38 measured cross sections for nat Nb(p,x) and nat Cu(p,x) reactions between 40-90 MeV, as well as 5 independent measurements of isomer branching ratios, are reported. These are useful in medical and basic … Show more

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Cited by 21 publications
(39 citation statements)
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“…The work described herein follows the methods utilized in our recent work and established by Graves et al for monitor reaction characterization of beam energy and fluence in stacked target irradiations [7,16]. Preliminary results were reported in a Master's thesis [17]; here we report the final analysis of that work.…”
Section: Experimental Methods and Materialsmentioning
confidence: 99%
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“…The work described herein follows the methods utilized in our recent work and established by Graves et al for monitor reaction characterization of beam energy and fluence in stacked target irradiations [7,16]. Preliminary results were reported in a Master's thesis [17]; here we report the final analysis of that work.…”
Section: Experimental Methods and Materialsmentioning
confidence: 99%
“…As in our previous work, these activities were used to calculate cumulative and independent cross sections [16]. For the first product nuclide in a mass chain with observable decay gammas, its (p,x) cross section is reported as a cumulative cross section (σ c ), which is the sum of direct production of that nucleus, as well as decay of its precursors and any other independent cross sections leading to that nucleus.…”
Section: Quantification Of Induced Activitiesmentioning
confidence: 99%
“…This monitor foil variance minimization technique was also performed with the Monte Carlo code MCNP [28]. This corresponded to a 15% enhancement in the degrader areal density, which is significantly higher than comparable values in the literature [16,17]. These results suggest a systematic issue in the low-energy charged-particle stopping power tables used by MCNP, and that a detailed comparison between the Anderson & Ziegler and MCNP stopping powers should be further explored in this intermediate energy range.…”
Section: Iii4 Optimization Of Energy Assignmentsmentioning
confidence: 93%
“…In this work we used the stacked-target activation technique, in which one can measure a reaction cross section by quantifying the activity induced within a thin foil of known areal density, using a beam of known intensity [16,17]. In a single irradiation, many foils can be placed in a "stack" (along with monitor foils), yielding cross section measurements at multiple energies by lowering the energy of the primary beam as it traverses the stack.…”
Section: Methodsmentioning
confidence: 99%
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