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A Study of the Resonance Interaction Effect between {sup 238}U and {sup 239}Pu in Lower Energy Region

Abstract

An investigation has been made of the statistical frequency function for the distances between the {sup 238}U and the {sup 239}Pu resonances in the region 4-244 eV. It is concluded that the frequency function is probably constant but that the distances diverge appreciably from a constant function in the actual case, and that the divergence is such that the interaction effect on the resonance integral is smaller than would be expected from statistical considerations. This is also confirmed by calculations on the interaction effect. These have been performed using three different methods, namely: a) considering the actual positions and widths of the resonances, b) assuming a constant frequency function for the resonance. spacing and applying a theory developed by Rowlands and E A Fischer. c) applying a simplified, approximate method for calculations based on the statistical theory. The calculations are made for two temperatures and two values of the plutonium enrichment. It is shown that the average cross sections are considerably larger than the statistical calculations indicate.
Authors:
Publication Date:
Dec 15, 1968
Product Type:
Technical Report
Report Number:
AE-344
Resource Relation:
Other Information: 19 refs., 12 figs., 12 tabs.
Subject:
22 GENERAL STUDIES OF NUCLEAR REACTORS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; PLUTONIUM 239; URANIUM 238; RESONANCE ABSORPTION; CROSS SECTIONS; EV RANGE; TEMPERATURE DEPENDENCE; REACTOR KINETICS
OSTI ID:
20956252
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708686
Availability:
Commercial reproduction prohibited; OSTI as DE20956252
Submitting Site:
SWDN
Size:
52 pages
Announcement Date:
Dec 29, 2007

Citation Formats

Haeggblom, H. A Study of the Resonance Interaction Effect between {sup 238}U and {sup 239}Pu in Lower Energy Region. Sweden: N. p., 1968. Web.
Haeggblom, H. A Study of the Resonance Interaction Effect between {sup 238}U and {sup 239}Pu in Lower Energy Region. Sweden.
Haeggblom, H. 1968. "A Study of the Resonance Interaction Effect between {sup 238}U and {sup 239}Pu in Lower Energy Region." Sweden.
@misc{etde_20956252,
title = {A Study of the Resonance Interaction Effect between {sup 238}U and {sup 239}Pu in Lower Energy Region}
author = {Haeggblom, H}
abstractNote = {An investigation has been made of the statistical frequency function for the distances between the {sup 238}U and the {sup 239}Pu resonances in the region 4-244 eV. It is concluded that the frequency function is probably constant but that the distances diverge appreciably from a constant function in the actual case, and that the divergence is such that the interaction effect on the resonance integral is smaller than would be expected from statistical considerations. This is also confirmed by calculations on the interaction effect. These have been performed using three different methods, namely: a) considering the actual positions and widths of the resonances, b) assuming a constant frequency function for the resonance. spacing and applying a theory developed by Rowlands and E A Fischer. c) applying a simplified, approximate method for calculations based on the statistical theory. The calculations are made for two temperatures and two values of the plutonium enrichment. It is shown that the average cross sections are considerably larger than the statistical calculations indicate.}
place = {Sweden}
year = {1968}
month = {Dec}
}