@Article{JAMS-5-148, author = {Zhang , QiangCao , MaoqiShan , XiaobinLi , YuquanWang , Zhenya 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 = {http://global-sci.org/intro/article_detail/jams/8319.html} }