%0 Journal Article
%T Total cross sections for scattering of positron from CO, HCl, NH3 and CH4 at intermediate and high energies<br>中高能正电子被CO，HCl，NH3及SiH4散射的总截面
%A Shi De-Heng
%A Sun Jin-Feng
%A Zhu Zun-Lue
%A Liu Yu-Fang
%A <br>施德恒
%A 孙金锋
%A 朱遵略
%A 刘玉芳
%J 物理学报
%D 2006
%I 
%X A complex optical model potential modified by incorporating the concept of bonded atom, which takes into consideration the overlapping effect of electron clouds between two atoms in a molecule, is firstly employed to calculate the total cross sections for positron scattering from CO, HCl, NH3, SiH4 in the incident energy range 30-3000eV by using additivity rule model at Hartree-Fock level. In the study, the complex optical model potential composed of static, correlation polarization plus absorption contributions firstly uses the bonded-atom concept. The results of quantitative molecular total cross sections are compared with those obtained by experiments and other theories wherever available, and good agreement is obtained. It is shown that the additivity rule model together with the complex optical potential model modified by incorporating the concept of bonded atom can give much better calculation results than the unmodified one.
%K positron scattering
%K additivity rule
%K bonded atom
%K total cross section<br>正电子散射，
%K 可加性规则，
%K 束缚原子，
%K 总截面
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=F6C8C77291DA7D74&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=94C357A881DFC066&sid=28E08C23724B97C7&eid=AA7C03890C788C34&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=30