He-O_2转动激发截面的理论计算

Theoretical calculation of rotational-excitation cross section for He-O_2

用公认精确的密耦 (Close Coupling)方法、采用两种不同的相互作用势计算了He -O2 碰撞的态 态转动激发截面 (E =2 6.8meV) ,通过系统研究和计算发现 :低能散射时 ,He -O2 碰撞的弹性散射主要发生在小角部分 ,而非弹性转动激发主要发生在大角部分。研究表明 :转动激发截面对势能表面的方向性和散射角都非常敏感。

State state rotational excitation cross sections have been calculated for He-O 2 collision by employing the accepted exact Close Coupling approximation method and two kinds of different interaction potentials at collision energy of 26.8 meV in this paper. it is found by systemic inverstigation and calculation that elastic scattering take place mainly at large scattering angle and inelastic rotational excitation chief at small scattering angle at low energy scattering for He O 2 system. It is shown that the rotational excitation cross sections are sensitive to the directionality of potential surface and scattering angle.