Valence and inner shell electronic processes in dissociative double photoionization of CH3I

Content Provider	Semantic Scholar
Author	Dujardin, Gérald Hellner, Lucette Winkoun, Dominique Besnard, M. J.
Copyright Year	1986
Abstract	Abstract The dissociative double photoionization of CH 3 I has been studied in the 28–62 eV photon energy range by using the photoion-photoion coincidence (PIPICO) method. At lower energies ( 3 I 2+ cations were produced by direct double photoionization involving the ejection of two valence electrons. Six channels for the dissociation of CH 3 I 2+ into two or three fragments were detected and analysed in detail. Their appearance potentials were measured, giving evidence that, at least, four electronic states of CH 3 I 2+ are involved in these fragmentation processes. At higher energies ( > 50eV), we observed resonant double photoionization associated with the electronic transitions from the I(4d) core levels to the lowest unoccupied a * 1 level and to the molecular Rydberg orbitals 6p and 7p of CH 3 I. The shape resonance of the I(4d → ef) transition was also observed in the double photoionization spectra. Doubly charged CH 3 I 2+ ions produced via the I(4d → ef) shape resonance were found to specifically dissociate as compared to those produced via the I(4d → a * 1 ) resonance or by direct double photoionization.
Starting Page	291
Ending Page	299
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1016/0301-0104(86)80075-1
Alternate Webpage(s)	https://notendur.hi.is/agust/rannsoknir/papers/cp105-291-86.pdf
Alternate Webpage(s)	https://doi.org/10.1016/0301-0104%2886%2980075-1
Volume Number	105
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article