Intrinsic momentum distributions of positron and positronium annihilation in polymers
Intrinsic momentum distributions of positron and positronium annihilation in polymers
复制标题
DOI：
10.1103/physrevb.71.012201
复制
发表时间：
2005-01
影响因子：
3.7
通讯作者：
Kiminori Sato;K. Ito;K. Hirata;R. Yu;Y. Kobayashi
中科院分区：
文献类型：
--
作者：
Kiminori Sato;K. Ito;K. Hirata;R. Yu;Y. Kobayashi
我们成功地提取了聚合物中正电子、副电子(-Ps)和正电子(-Ps)的内禀动量分布。出乎意料的是，这些分布超出了范围，不能用单一的高斯或高斯的总和来近似，这意味着不同的电子态对动量分布有贡献。在含碳、含氧和含氟的聚合物基团(、和基团)的顺序上，轮廓较窄。该基团的-Ps谱宽是和基团的1.4倍，而三个聚合物基团的-Ps谱线基本相同。
We succeeded in extracting intrinsic momentum profiles of positrons, parapositronium (-Ps), and orthopositronium (-Ps) in polymers. Unexpectedly, theprofiles extend beyondand cannot be approximated by either a single Gaussian or the sum of Gaussians, implying that different electron states contribute to the momentum distributions. Theprofiles are narrower in the order of carbon-, oxygen-, and fluorine-containing polymer groups (,, andgroups). The-Ps profile in thegroup is 1.4 times as broad as those of theandgroups, whereas-Ps profiles are essentially identical in the three polymer groups.