Resonant scattering of positronium in collision with CO2.
Resonant scattering of positronium in collision with CO2.
复制标题
正电子素与 CO2 碰撞时的共振散射。
DOI：
10.1103/physrevlett.105.263401
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发表时间：
2010
影响因子：
8.6
通讯作者：
Brawley SJ
中科院分区：
文献类型：
--
作者：
Brawley SJ
二氧化碳分子散射的正电子素 (Ps) 的总横截面已在 (7–400) eV 入射 Ps 能量范围内进行测量。在 Ps 碰撞中，首次观察到类共振结构。对于目前的目标，它发生在 9.5 eV 左右，随后是一个更宽的峰值。 Brawley 等人[Science 330, 789 (2010)SCIEAS0036-807510.1126/science.1192322] 观察到以相同速度入射到给定目标的正电子素和电子的总横截面之间的相似性，并进行了相应的比较。比较表明，前一个峰对应于众所周知的形状共振，该共振发生在电子入射速度为 0.5 a.u 的情况下。讨论了更多特征并寻求理论输入。
The total cross sections of positronium (Ps) scattering from a carbon-dioxide molecule have been measured over the range (7–400) eV incident-Ps energy. For the first time in Ps collisions, a resonantlike structure is observed. For the present target, it occurs around 9.5 eV followed by a broader peak at. Following Brawleyet al.[Science 330, 789 (2010)SCIEAS0036-807510.1126/science.1192322] who have observed similarities between the total cross sections of positronium and of electrons incident upon a given target at the same velocity, a corresponding comparison is made for. The comparison suggests that the former peak corresponds to the well-knownshape resonance which occurs for electrons at an incident velocity of 0.5 a.u. Further features are discussed and theoretical input is sought.