ISSN:
1573-8205
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Physics
Notes:
Abstract The results of measurements of thermal-neutron cross sections, level distributions in the resonance region, $${{\overline {\Gamma _n^0 } } \mathord{\left/ {\vphantom {{\overline {\Gamma _n^0 } } D}} \right. \kern-\nulldelimiterspace} D}$$ ratios, and determinations of the effective nuclear radius from potential:.scattering of slow neutrons are considered. A discrepancy in the results of measurements of the thermal-neutron fission cross secticn in U235 is noted. The distribution of levels exhibits a deficiency in small spacings as compared with a random distribution, i. e., there seems to be a “repulsion” of levels. The dependence of $${{\overline {\Gamma _n^0 } } \mathord{\left/ {\vphantom {{\overline {\Gamma _n^0 } } D}} \right. \kern-\nulldelimiterspace} D}$$ on atomic number A is nonmonotonic, in accordance with the complex-potential model of the nucleus; however there is a considerable discrepancy between the experimental data and theory for atomic numbers in the neighborhood of 100. The effective radius determined from potential scattering of slow neutrons indicates a nonmonotonic dependence on A, in agreement with the model of a semi-transparent nucleus with smeared-out edges.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01514557
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