232Th(n,{gamma})233Th Thermal Reaction Cross-Section Measurement

Journal Article · Tue May 24 00:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1945281· OSTI ID:20722460

Maidana, Nora L; Vanin, Vito R; Pascholati, Paulo R; Helene, Otaviano ^[1]; Castro, Ruy M ^[2]; Dias, Mauro S; Koskinas, Marina F ^[3]

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1. Laboratorio do Acelerador Linear, Instituto de Fisica, Universidade de Sao Paulo, Travessa R 187, Cidade Universitaria, CEP: 05508-900 Sao Paulo, SP (Brazil)
2. Laboratorio do Acelerador Linear, Instituto de Fisica, Universidade de Sao Paulo, Travessa R 187, Cidade Universitaria, CEP: 05508-900 Sao Paulo, SP (Brazil) and DiviSao de Sensoriamento Remoto, Instituto de Estudos Avancados, Centro Tecnico Aeroespacial, Rodovia dos Tamoios, km 5, 5, CEP: 12228-840 S. Jose dos Campos, SP (Brazil)
3. Laboratorio de Metrologia Nuclear, Instituto de Pesquisas Energeticas e Nucleares. IPEN-CNEN/SP, Travessa R 400, Cidade Universitaria, CEP: 05508-900 Sao Paulo, SP (Brazil)

The 232Th(n,{gamma})233Th thermal neutron-capture reaction cross section was measured using targets of {approx} 1.5 mg of high-purity metallic thorium irradiated in the IPEN IEA-R1m 5 MW pool research reactor. The 197Au(n,{gamma})198Au reaction was used to monitor the thermal and epithermal neutron fluxes in the irradiation position, which was found using the Westcott formalism. The residual gamma-ray activity was followed with an HPGe detector. The detector efficiency curve was fitted by the least-squares method applying covariance analysis to all uncertainties involved. The experimental result is {sigma}0 =7.20{+-}0.20 b, in agreement with previous published values.

• OSTI ID: 20722460
• Journal Information: AIP Conference Proceedings, Vol. 769, Issue 1; Conference: International conference on nuclear data for science and technology, Santa Fe, NM (United States), 26 Sep - 1 Oct 2004; Other Information: DOI: 10.1063/1.1945281; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CAPTURE
CROSS SECTIONS
EFFICIENCY
EPITHERMAL NEUTRONS
GAMMA DETECTION
GAMMA RADIATION
GOLD 197
GOLD 198
HIGH-PURITY GE DETECTORS
LEAST SQUARE FIT
NEUTRON REACTIONS
RESEARCH REACTORS
THERMAL NEUTRONS
THORIUM 232
THORIUM 233