@Article{JAMS-5-2, author = {Zhang, Qiang and Maoqi, Cao and Xiaobin, Shan and Yuquan, Li and Zhenya, Wang and Sheng, Liusi}, title = {Study on $H_3^+$ Formation by Synchrotron Radiation}, journal = {Journal of Atomic and Molecular Sciences}, year = {2014}, volume = {5}, number = {2}, pages = {148--155}, abstract = {

A molecular beam experiment on the formation of $H^+_3$ has been carried out by using tunable vacuum ultraviolet (VUV) synchrotron radiation. Reflectron time-of-flight mass spectrometer is applied to detect the signal of $H^+_3.$ The ionization energy (IE) of $H_2$ and the appearance energy (AE) of $H^+_3$ are determined to be 15.41 eV and 14.61 eV, respectively, by measurements of photoionization efficiency (PIE) curves. Additionally, two most likely $H^+_3$ formation ways, $(H_2)2\rightarrow H^3_+  +H$ and $(H_2)_3 \rightarrow H^+_3 +H+H_2,$ are discussed by ab initio calculations at CCSD(T) and MP2 level with aug-cc-pVQZ basis set and compared with the experimental result. The optimized geometries of species involved in the dissociative photoionization channels are also determined at MP2/aug-cc-pVQZ level.

}, issn = {2079-7346}, doi = {https://doi.org/10.4208/jams.042813.070213a}, url = {https://global-sci.com/article/74299/study-on-h-3-formation-by-synchrotron-radiation} }