VELOCITY DEPENDENCE OF STABILIZED DOUBLE-ELECTRON CAPTURE IN N7+-AR COLLISIONS

被引：7

作者：

MARTIN, S ^{[1
]}

BERNARD, J ^{[1
]}

DENIS, A ^{[1
]}

DESESQUELLES, J ^{[1
]}

CHEN, L ^{[1
]}

OUERDANE, Y ^{[1
]}

机构：

[1] UNIV ST ETIENNE, TRAITEMENT SIGNAL & INSTRUMENTAT LAB, F-42023 ST ETIENNE, FRANCE

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 1995年 / 98卷 / 1-4期

关键词：

D O I：

10.1016/0168-583X(95)00124-7

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have studied the two-electron processes in the collision of N7+ with argon at various energies. We have measured the radiative stabilization P-rad, defined as the ratio of the true double capture sigma(TDC) to the total double capture which is the sum of sigma(TDC) and the autoionizing double capture sigma(ADC). A large enhancement of P-rad (17-44%) with decreasing projectile velocity (0.6-0.14 a.u.) has been found. On the other hand, by using the photon-ion coincidence technique to select the double capture processes, we have observed an increase of the emission cross sections of optical transitions from (3, n) Rydberg states with decreasing projectile energy. We give a tentative explanation which is based on a combination of autotransfer to Rydberg stales and the postcollisional ''satellisation'' of the Rydberg electron described by Roncin and Kazansky.

引用

页码：270 / 274

页数：5

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