Target structure induced suppression of the ionization cross section for very low energy antiproton-hydrogen collisions.
Target structure induced suppression of the ionization cross section for very low energy antiproton-hydrogen collisions.
复制标题
目标结构诱导极低能量反质子-氢碰撞的电离截面的抑制。
DOI：
10.1103/physrevlett.105.213201
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发表时间：
2010
影响因子：
8.6
通讯作者：
Knudsen H
中科院分区：
文献类型：
--
作者：
Knudsen H
低能反质子以前曾被用来为原子碰撞理论提供基准数据。在这里，我们提出了测量的横截面的单一，非离解电离的分子氢的影响，反质子的动能范围在2-11 keV，即，在0.3- 0.65a. u.我们发现一个横截面是成比例的弹丸速度，这是完全不同的行为相应的原子横截面，这是以前从未被观察到的实验。
Low energy antiprotons have been used previously to give benchmark data for theories of atomic collisions. Here we present measurements of the cross section for single, nondissociative ionization of molecular hydrogen for impact of antiprotons with kinetic energies in the range 2–11 keV, i.e., in the velocity interval of 0.3–0.65 a.u. We find a cross section which is proportional to the projectile velocity, which is quite unlike the behavior of corresponding atomic cross sections, and which has never previously been observed experimentally.