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- W304889159 abstract "The symmetrized Simonius representation of the S matrix is used to study the statistical properties of its fluctuating component in the presence of direct reactions. The case of strongly overlapping resonance levels and a large number of open channels is considered in the approximation that the compound-nucleus cross sections coupling different channels are equal. It is shown that the use of the average unitarity condition on the real energy axis permits the elimination of both resonance-resonance and channel-channel correlations from the partial transition amplitudes. As a result, the basic premises of the Ericson theory of nuclear cross-section fluctuations are derived independently of the relation between the degree of overlap of the resonances and the number of open channels, and the validity of the Hauser-Feshbach model is established. When there is a large number of open channels the time at which uniform population of the compound-nucleus configurations occurs for an open excited nuclear system is much smaller than the Poincare time. The lifetime of a compound nucleus is discussed." @default.
- W304889159 created "2016-06-24" @default.
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- W304889159 date "1985-03-01" @default.
- W304889159 modified "2023-09-26" @default.
- W304889159 title "Fluctuations of nuclear cross sections in the region of strongly overlapping resonances and for a large number of open channels" @default.
- W304889159 hasPublicationYear "1985" @default.
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