Fragmentation of Naq clusters by He impact: effect of initial 3 cluster temperature on non-adiabatic phenomena
نویسندگان
چکیده
A theoretical study has been carried out of the fragmentation of Naq ions following a collision with He. The collision 3 q Ž q leaves Na in any of three electronic states, and each of these can fragment into three product channels Na qNa, 3 2 q q. q Na qNa and NaqNaqNa . The Na system has a conical intersection and an avoided crossing; these permit 2 3 transitions between the different states. Cross-sections for each of the nine fragmentation pathways are presented for three different values of the initial vibrational excitation of Naq. The cross-sections are very sensitive to this vibrational energy. 3 q 2000 Elsevier Science B.V. All rights reserved.
منابع مشابه
A theoretical description of multi-channel fragmentation of the Naq cluster-ion in collision with a He target
q Ž . Fragmentation of the Na cluster-ion in collision with He in the 100 eV centre of mass energy range is investigated 3 theoretically. The dynamics study is split into two stages: the He–Naq encounter itself and the post-collisional motion of the 3 Naq cluster-ion. The first stage is treated semiclassically and involves a ‘frozen cluster approximation’. The second stage is 3 treated by a tra...
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