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[en] For dosimetric purpose, an accurate knowledge of the 237Np to 235U fission cross-section ratio is necessary. These data are also required for a systematic study of fission cross-sections. Fission cross-section ratio was determined for 237Np/235U around 14 MeV neutron energies with a back-to-back ionization chamber. Neutrons were produced by a 180 kV accelerator using the T(d, n)4He reaction. No significant energy dependence was found in the cross-section ratio. (author) 10 refs.; 3 figs.; 3 tabs
Journal
[en] Paper is devoted to develop a single analytical instrument to design and interpret experiment to measure the neutron removal cross sections. There were analyzed the influence of the geometrical and nuclear parameters into the neutron removal cross sections values measured
Journal
Nucleus (Havana); ISSN 0864-084X; 
; (no.31); p. 22-26
; (no.31); p. 22-26
[en] Neutron reflection method was used for the fast estimation of the neutron removal cross section in hydrogenous materials of simple composition. The accuracy of the measurement was about 8%. The method is rapid and reliable, but it is limited to hydrogenous materials with a low concentration of neutron absorbing elements. (author)
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 243(3); p. 835-837
; CODEN JRNCDM; v. 243(3); p. 835-837
[en] The present paper is devoted to expand the use of neutron reflection method for the fast estimation of the removal cross section in complex materials. A quadratic dependence of the removal cross section from the neutron reflection coefficient was found. The sensitivity of the method decreases with increasing value of the neutron reflection coefficient. (author)
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 246(2); p. 411-412
; CODEN JRNCDM; v. 246(2); p. 411-412
[en] In an open neutron reflection setup there are some basic design parameters that have an important influence on the value of the sensitivity. The effects of variations of such parameters in the sensitivity (S) were calculated applying the Monte Carlo N-particle transport code system MCNP-4A. (author)
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 242(1); p. 211-213
; CODEN JRNCDM; v. 242(1); p. 211-213
[en] The present paper is devoted to expose a method for Removal Cross Section measurement based in the Associated Particle Technique. Results are compared with those obtained by Activation Methods. Advantages and disadvantages of such method were in detail analysed
Journal
Nucleus (Havana); ISSN 0864-084X; ; (no.29); p. 30-34
; (no.29); p. 30-34
[en] The moisture measurement of filter press mud was made by γ-transmission method in the range of interest for the industry (60-85%). A 32 mCi activity 137Cs source was used. The method satisfies the requirements of industry. (author). 1 ref., 2 figs
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 201(4); p. 321-324
; CODEN JRNCDM; v. 201(4); p. 321-324
[en] Determination of boric acid in high nickel content solutions during nickel cathode production was made by measuring the transmission loss of thermal neutrons. According to industrial requirements, adequate accuracy and reproducibility were obtained. (author) 2 refs.; 1 tab
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731; ; CODEN JRNCDM; v. 199(4); p. 305-308
; CODEN JRNCDM; v. 199(4); p. 305-308
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