Measurement of Thermal Neutron Capture Cross Section and Resonance Integral of the237Np(n, γ)238Np Reaction

Autor:	Kenso Fujiwara, Hajimu Yamana, Hideo Harada, Toshio Katoh, Shoji Nakamura, Kazuyoshi Furutaka, Toshiyuki Fujii
Rok vydání:	2003
Předmět:	Nuclear physics Nuclear reaction Nuclear and High Energy Physics Neutron capture Nuclear Energy and Engineering Chemistry Analytical chemistry Neutron cross section Resonance Gamma spectroscopy Research reactor Irradiation Neutron temperature
Zdroj:	Journal of Nuclear Science and Technology. 40:559-568
ISSN:	1881-1248 0022-3131
Popis:	The thermal neutron capture cross section (σ0) and the resonance integral (I 0)of 237Np have been measured by an activation method to supply basic data for the study of transmutation of nuclear waste. The neutron irradiation of 237Np samples have been done at the Research Reactor Institute, Kyoto University (KUR). Samples of 237Np were irradiated between two Cd sheets or without a Cd sheet. Since 237Np has a strong resonance at the energy of 0.49 eV, the Cd cutoff energy was adjusted at 0.358 eV (thickness of the Cd sheets: 0.125 mm). A high purity Ge detector was employed for activity measurement. The reaction rate to produce 238Np from 237Np was analyzed by the Westcott's convention. Results obtained were 141.7±5.4 barns for σ0 and 862±51 barns for I 0 above 0.358 eV of 273Np. By setting the Cd cut-off energy at 0.358 eV considering the resonance at 0.49 eV, a smaller value of σ0 was obtained in this work than the values reported by the previous authors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cf8756b4010b4f9c8a128c4b7fa0b0b0 https://doi.org/10.1080/18811248.2003.9715392 Zobrazit plný text záznamu