Dissociative ionization dynamics of triatomic molecules induced by soft X-rays

[摘要] Soft X-rays (50eV to 170eV) have been used in conjunction with a triple coincidence time and position sensitive detection apparatus to observe the Coulomb explosion of OCS and CS2. By varying the X-ray energy we can access ionization channels which result in two or three body break up, for 3+, such as O++C++S+and for 4+ such as S++C++S2+. We can compare the kinetic energy release to the value calculated for a purely Coulombic break up from near equilibrium. The extent to which channels are concerted or stepwise is also determined.

[发布机构] Department of Physics, University of Waterloo, 200 University Avenue West, Waterlooa; ON; N2L 3G1, Canada^1;Canadian Light Source, 44 Innovation Boulevard, Saskatoona; SK; S7N 2V3, Canada^2

[关键词] Coulomb explosion;Dissociative ionization;Ionization channels;Kinetic energy release;Position sensitive detections;Three body;Triatomic molecules;X-ray energies