摘要
A method for calculating multistep direct reactions for both continuum anddiscrete levels is proposed.The energy-angle correction scattering kernel is adopted forcontinuum and discrete levels in the semiclassical approach,in which the angular mo-mentum and parity conservations are considered.The Legendre coefficients of the angu-lar distributions are calculated based on one-step distorted wave Born approximation instead of nucleon-nucleon scattering expressions in nuclear matter.The calculateddiscrete level neutron angular distributions of <sup>11</sup>B（p,n<sub>0</sub>）<sup>11</sup>C reaction and the cross sec-tions of<sup>11</sup>B（p,n<sub>0</sub>）<sup>11</sup>C and <sup>11</sup>B（p,n）<sup>11</sup>C reactions reproduce the experimental data reason-ably.This approach can also be used for composite particle emissions.
A method for calculating multistep direct reactions for both continuum and discrete levels is proposed.The energy-angle correction scattering kernel is adopted for continuum and discrete levels in the semiclassical approach,in which the angular mo- mentum and parity conservations are considered.The Legendre coefficients of the angu- lar distributions are calculated based on one-step distorted wave Born approximation in stead of nucleon-nucleon scattering expressions in nuclear matter.The calculated discrete level neutron angular distributions of <sup>11</sup>B（p,n<sub>0</sub>）<sup>11</sup>C reaction and the cross sec- tions of<sup>11</sup>B（p,n<sub>0</sub>）<sup>11</sup>C and <sup>11</sup>B（p,n）<sup>11</sup>C reactions reproduce the experimental data reason- ably.This approach can also be used for composite particle emissions.
