Dissociation of Molecules in Slow Collisions of Highly Charged Ions with Molecules

研究了Ar^-lt；q+&gt；(q=6-9)离子与N_2和CO分子慢碰撞过程中的单电子和多电子俘获过程。给出了1.75qkeVAr^&lt；q+&gt；(q=6-9)与N_2和CO分子碰撞中多重电子俘获过程的实验结果。利用10V/cN-50V/cm电场从碰撞区引出的反冲分子离子与散射离子Ar^&lt；(q-1)+&gt；(j=1，2，3)的电荷态进行了符合分析，并用飞行时间法(TOF)进行了分析。这会导致飞行时间光谱分裂成一个“前向”峰和另一个“后向”峰。

Single and multiple electron capture processes are studied in slow collisions between Ar^<q+> (q=6-9) ions and N_2 and CO molecules. The contribution of dissociative and non-dissociative channels are determined as well as the kinetic energies of the fragments of the molecular ions.We present experimental results of multiple electron capture processes in 1.75q keV Ar^<q+> (q=6-9) collisions with N_2 and CO molecules. The charge state of the scattered ions Ar^<(q-1)+> (j=1,2,3) are analyzed in coincidence with the recoil molecular ions extracted from the collision region by an electric field (10V/cn - 50V/cm) and analyzed by a time-of-flight method (TOF).In the present TOF spectrometer, the ions with kinetic energies greater than a certain value, which depends on the extraction field, can not reach the detector. This causes a splitting of the TOF spectrum into one 'forward' and the other 'backward' peak.