Kinetic-energy release in CO dissociation caused by fastF4+impact

Ionic fragmentation of the CO molecule by impact of 10-keV electrons: Kinetic-energy-release distributions

“…It is seen that the relative intensity for the C 2+ + O + channel is relatively larger than that for the C + + O 2+ channel (see also Table I). Similar results have been noted by other workers [6,19,24]. The difference in the relative intensity between the two channels is attributed to the nature of dissociation dynamics because the lower dissociation limit for C + + O 2+ lies about 11.0 eV above the lowest dissociation limit for the C 2+ + O + channel [42].…”

“…Precursor-specific partial ionization cross sections, σ n (n = 1-4) (×10 −2 ), for fragment ions produced in collisions of 10-keV electrons with CO expressed relative to the cross section for formation of CO + ; the suffix n denotes the ionization state of CO after the removal of n number of electrons. ion impact, Ben-Itzhak et al [24] and Tarisien et al [27] have obtained the KER component below 5 eV; they have concluded that this KER component arises due to the dissociation of a metastable CO 2+ molecular ion via the tunneling process. It is noted that the KERD has a long tail which may arise due to the participating higher states of the CO 2+ ion.…”

“…Hence the study of fragmentation dynamics of a CO molecule induced by the energetic particles sheds light on the chemical and the physical processes occurring in the interstellar space. The partial ionization cross sections (PICSs) ( [14][15][16][17] and references therein) and the fragmentation dynamics of the CO molecule have been studied by many workers in the past [18][19][20][21][22][23][24][25][26][27]. Most of the studies were devoted to the electronic states of singly charged molecular ion and/or of the fragmentation channel C + + O + arising either from the dissociation of a CO 2+ ion or from the autoionization of a highly excited CO + ion with the impact of low-energy electrons and photons [3,4,[18][19][20].…”

“…Most of the studies were devoted to the electronic states of singly charged molecular ion and/or of the fragmentation channel C + + O + arising either from the dissociation of a CO 2+ ion or from the autoionization of a highly excited CO + ion with the impact of low-energy electrons and photons [3,4,[18][19][20]. Few studies have been devoted to examining the multiply charged molecular ions of CO using different experimental techniques by the impact of ions and the intense laser fields [5,[21][22][23][24][25][26]. However, the study of fragmentation of a multiply charged CO molecule produced from the impact of energetic electrons is scarce.…”

Formation and dissociation of triply charged fragment ions of benzene

“…3,4,5 Besides electron impact and electrospray multiply charged molecules and clusters have been produced during the last decade applying several other methods such as intense laser pulses, 6-11 synchrotron radiation [12][13][14] or collisions with highly charged atoms. [15][16][17] However, in many of these experiments mostly atomic fragment ions 7,8,12,15 are observed as the result of the Coulomb explosion of the highly charged precursor molecule. Benzene and other cyclic molecules turn out to resist Coulomb explosion much better than many other small molecules.…”