Electron impact single detachment on the F- ions using the heavy ion storage ring CRYRING: Cross-section determination
Electron impact single detachment on the F- ions using the heavy ion storage ring CRYRING: Cross-section determination
复制标题
使用重离子存储环对 F 离子进行电子撞击单次分离 CRYRING：横截面测定
DOI：
10.1007/s100530170248
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
A. Le Padellec
中科院分区：
文献类型：
--
作者：
K. Andersson;D. Hanstorp;A. Neau;S. Rosén;H. Schmidt;R. Thomas;M. Larsson;J. Semaniak;F. Österdahl;H. Danared;A. Källberg;A. Le Padellec
在瑞典斯德哥尔摩的Manne Siegbahn实验室的重离子储存环上，研究了F-的电子碰撞单脱附（EISD）。储存在环中的F-离子与环部分之一中的电子束合并。在EISD过程中产生的中性F原子被检测到在零度方向使用的表面势垒检测器。发现分离过程的阈值约为7.6 eV，因此是F-结合能的两倍多。截面在55 eV处平滑增加，最大值为1.9 ×10- 16 cm ~ 2。在更高的能量下，观察到截面的缓慢减小，这遵循由Bethe-Born近似预测的能量依赖性。实验结果表明，CHARARING可以很好地用于阴离子的研究，并即将进行几项实验。
Electron Impact Single Detachment (EISD) of F-has been studied using the heavy ion storage ring CRYRING at the Manne Siegbahn Laboratory, Stockholm, Sweden. F-ions stored in the ring were merged with an electron beam in one of the ring sections. Neutral F atoms produced in the EISD process were detected in the zero-degree direction using a surface barrier detector. The threshold for the detachment process was found to be around 7.6 eV, thus more than twice the binding energy of F-. The cross-sections increased smoothly up to 55 eV where it reached a maximum of1.9×10-16cm2. At higher energies a slow decrease of the cross-section was observed, which follows the energy dependence predicted by the Bethe-Born approximation. The experiment showed that CRYRING can be used favourably for studies of anions, and several experiments are forthcoming.