Examination of (e,2e) scattering models by comparison of momentum profiles of noble gases between experiment and theory.
Examination of (e,2e) scattering models by comparison of momentum profiles of noble gases between experiment and theory.
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DOI：
10.1039/b603117j
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发表时间：
2006-06
期刊：
影响因子：
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通讯作者：
Y. Miyake;M. Takahashi;N. Watanabe;Y. Khajuria;Y. Udagawa;Yasuhiro Sakai;T. Mukoyama
中科院分区：
文献类型：
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作者：
Y. Miyake;M. Takahashi;N. Watanabe;Y. Khajuria;Y. Udagawa;Yasuhiro Sakai;T. Mukoyama
用新研制的多通道（e，2e）谱仪测量了入射电子能量约为2keV的惰性气体Ar、Kr和Ar的两个最外层原子轨道的动量分布。实验结果表明，显着改善统计相比，在以前的研究中取得的，同时涵盖了广泛的动量高达3.6 a.u。计算结果与理论计算进行了比较，使用四个（e，2e）散射模型，平面波脉冲和玻恩近似（PWIA和PWBA），和扭曲波脉冲和玻恩近似（DWIA和DWBA）。DWIA和DWBA散射模型已被发现令人满意地再现实验动量剖面的形状和强度在整个动量范围内覆盖，表明扭曲波效应的重要性，定量描述（e，2e）反应。
Momentum profiles have been measured for the two outermost atomic orbitals of noble gases, Ar, Kr and Xe, at incident electron energy of about 2 keV using a newly developed multichannel (e,2e) spectrometer. The experimental results exhibit significantly improved statistics compared with those achieved in previous studies while covering a wide range of momenta up to 3.6 a.u. The results are compared with theoretical calculations using four (e,2e) scattering models, the plane-wave impulse and Born approximations (PWIA and PWBA), and the distorted-wave impulse and Born approximations (DWIA and DWBA). The DWIA and DWBA scattering models have been found to satisfactorily reproduce the experimental momentum profiles in terms of both shape and intensity over the entire momentum range covered, indicating the importance of distorted wave effects for quantitatively describing (e,2e) reaction.