我系原子分子物理学科点博士研究生张松斌与中国工程物理研究院应用物理和计算数学研究所的王建国研究员及马其顿academy of sciences and arts的r. k. janev教授合作，在最新一期的物理学评论快报(physical review letters 104, 023203, 2010)上发表了一篇理论文章，文章通过理论计算揭示了库仑屏蔽对电子与氢原子近阈碰撞激发过程的影响，该工作对高温稠密等离子体的谱学研究有帮助。文章的标题和摘要如下：
crossover of feshbach resonances to shape-type resonances in electron-hydrogen
atom excitation with a screened coulomb interaction
song bin zhang,1 jian guo wang,2 and r. k. janev3
1hefei national laboratory for physical sciences at microscale and department of modern physics,
university of science and technology of china, hefei 230026, china
2key laboratory of computational physics, institute of applied physics and computational mathematics,p.o. box 8009, beijing 100088, china
3macedonian academy of sciences and arts, p.o. box 428, 1000 skopje, macedonia
(received 2 november 2009; published 12 january 2010)
the effects of coulomb interaction screening on electron-hydrogen atom excitation in the n = 2 threshold region are investigated by using the r-matrix method with pseudostates. the interaction screening lifts the l degeneracy of n = 2 coulomb energy level, producing two distinct thresholds for 2s and 2p states. the phenomenon of transformation of 1,3p and 1d feshbach resonances into shape-type resonances is observed when they pass across the 2s and 2p threshold, respectively, as the interaction screening increases. it is shown that this resonance transformation leads to dramatic effects in the 1s ->2s and 1s -> 2p excitation collision strengths in the n = 2 threshold collision energy region.