Neutron activation cross sections on lead isotopes

Journal Article · Sat Aug 15 04:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.024610· OSTI ID:21293785

Semkova, V; Reimer, P; Altzitzoglou, T; Plompen, A J. M.; Quetel, C; Sudar, S; Vogl, J; Koning, A J; Qaim, S M; Smith, D L ^[1]

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1. European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, B-2440 Geel (Belgium)

The cross sections for the reactions {sup 204}Pb(n,n{sup '}{gamma}){sup 204}Pb{sup m}, {sup 204}Pb(n,2n){sup 203}Pb, {sup 204}Pb(n,2n){sup 203}Pb{sup m1}, {sup 204}Pb(n,3n){sup 202}Pb{sup m}, {sup 206}Pb(n,3n){sup 204}Pb{sup m}, {sup 206}Pb(n,{alpha}){sup 203}Hg, and {sup 208}Pb(n,p){sup 208}Tl were determined at the IRMM van de Graaff laboratory in the neutron energy range from 14 to 21 MeV. Both natural and enriched samples were irradiated with neutrons produced via the {sup 3}H(d,n){sup 4}He reaction. The induced activities were determined by gamma-ray spectrometry using a HPGe detector in a low-background shield. Neutron fluences were determined with the well-known cross section of the {sup 27}Al(n,{alpha}){sup 24}Na reaction. Enriched samples were essential to determine the cross sections for the reactions with {sup 204}Pb{sup m} and {sup 206}Pb{sup m} isomers in the final state. Accurate results for reactions with {sup 204,206}Pb as target nuclei with natural lead samples were enabled through a precise measurement of the isotopic ratios. For a first investigation of the consequences of the present data for nuclear reaction models they were confronted with calculations based on global parameter systematics in a phenomenological and in a microscopic approach and with parameters selected to reproduce the available data. The TALYS code was used for the former two calculations involving parameter systematics while the STAPRE code was used for the latter calculation.

• OSTI ID: 21293785
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 80; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ALUMINIUM 27
CROSS SECTIONS
GAMMA DECAY
GAMMA SPECTROSCOPY
HELIUM 4
HIGH-PURITY GE DETECTORS
ISOMERS
ISOTOPE RATIO
LEAD 203
LEAD 204 TARGET
LEAD 206 TARGET
LEAD 208
MERCURY 203
MEV RANGE 10-100
NEUTRON EMISSION
NEUTRONS
NUCLEAR REACTIONS
SODIUM 24
THALLIUM 208
TRITIUM
VAN DE GRAAFF ACCELERATORS