Observation of radiative double electron capture for

Observation of radiative double electron capture for
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辐射双电子捕获的观测

DOI:
10.1002/xrs.3063
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发表时间:
2019
期刊:
影响因子:
1.2
通讯作者:
Tanis, John A.
Tanis, John A.
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Kumara, Nuwan;La Mantia, David S.;Buglione, Stephanie L.;McCoy, Craig P.;Taylor, Charles J.;White, Jacob S.;Kayani, Asghar;Tanis, John A.

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研究了辐射双电子俘获(RDEC)现象,即两个电子被俘获到一个射弹离子中,同时发射一个光子。RDEC可以看作是双光电离的时间逆过程。在F9++ N2碰撞和单电子F8+中发现了RDEC的强有力证据,预计该过程的概率要小得多。RDEC的横截面的初步值已经确定。气体靶的一个显著优点是,由于气体靶普遍存在的单次碰撞条件,避免了固体靶的多次碰撞效应。
Radiative double electron capture (RDEC), occurring when two electrons are captured to a projectile ion with the simultaneous emission of a single photon, has been investigated. RDEC can be considered as the time inverse process of double photoionization. Strong evidence for RDEC is found in F9++ N2collisions and additionally for one‐electron F8+for which the probability for the process is expected to be considerably smaller. Preliminary values for the cross sections for RDEC have been determined. A significant advantage of the gas target is that multiple‐collision effects seen for a solid target are avoided due to the single‐collision conditions that prevail for gas targets.
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