Author:
Xu Hai-Feng ,Li Qi-Feng ,Zhou Xiao-Guo ,Dai Jing-Hua ,Liu Shi-Lin ,Ma Xing-Xiao ,
Abstract
Pure parent ions, N2O+, populated at X2Π(000), were prepared by (3+1) multiphoton ionization of jet cooled N2O molecules at 360.55nm, and then were excited to different vibrational levels of predissociative A2Σ+ state by another laser in the wavelength range of 275—328nm. The total released translational energies 〈ET〉 at different excitation energies were measured with a time of flight (TOF) spectrometer from the TOF broadenings of the NO+ fragment.The 〈ET〉value drops abruptly from ~8000cm-1 to ~1600cm-1 at excitation energy of ~32000cm-1.Further analysis shows that at the excitation energies below 32000cm-1, the dissociation channel is NO+(X1Σ+)+N(4S), and at the energies above 32000cm-1 a new channel, NO+(X1Σ+)+N(2D), is opened and replaces completely the N(4S) channel. The predissociation mechanism of the N2O+(A2Σ+) ions was discussed based on the experimental results.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
Cited by
8 articles.
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