Study of the mechanisms of pre-equilibrium nuclear reactions in the microscopic approach

The mechanisms of pre-equilibrium nuclear reactions are investigated within the Statistical Multistep Direct Process (SMDP) + Statistical Multistep Compound Process (SMCP) formalism. It has been shown that from an analysis of linear part in such dependences as $$ln left[ {{{frac{{d^2 sigma }}{{dvarepsilon _b dOmega _b }}} mathord{left/ {vphantom {{frac{{d^2 sigma }}{{dvarepsilon _b dOmega _b }}} {varepsilon _b^{1/2} }}} right. kern-nulldelimiterspace} {varepsilon _b^{1/2} }}} right]uponvarepsilon _b $$ and $$ln left[ {{{frac{{dsigma ^{SMDP to SMCP} }}{{dvarepsilon _b }}} mathord{left/ {vphantom {{frac{{dsigma ^{SMDP to SMCP} }}{{dvarepsilon _b }}} {frac{{dsigma ^{SMDP} }}{{dvarepsilon _b }}}}} right. kern-nulldelimiterspace} {frac{{dsigma ^{SMDP} }}{{dvarepsilon _b }}}}} right]upon{{U_B } mathord{left/ {vphantom {{U_B } {left( {E_a - B_b } right)}}} right. kern-nulldelimiterspace} {left( {E_a - B_b } right)}}$$ one can extract information about the type of mechanism (SMDP, SMCP, SMDP→SMCP) and the number of stages of the multistep emission of secondary particles. In the above approach, we have discussed the experimental data for a broad class of reactions in various entrance and exit channels.