Investigating the breakup dynamics of dihydrogen sulfide ions recombining with electrons.
This paper presents results concerning measurements of the dissociative recombination (DR) of dihydrogen sulfide ions. In combination with the ion storage ring CRYRING an imaging technique was used to investigate the breakup dynamics of the three-body channel in the DR of 32SD2(+). The two energetically available product channels S(3P) + 2D(2S) and S(1D) + 2D(2S) were both populated, with a branching fraction of the ground-state channel of 0.6(0.1). Information about the angle between the two deuterium atoms upon dissociation was obtained together with information about how the available kinetic energy was distributed between the two light fragments. The recombination cross sections as functions of energy in the interval of 1 meV to 0.3 eV in the center-of-mass frame are presented for 34SH2(+). The thermal rate coefficient for the DR of 34SH2(+) was determined to be (4.8+/-1.0) x 10(-7)(T/300)(-0.72+/-0.1) cm3 s(-1) over this interval.
Department of Physics, Stockholm University, AlbaNova, S-106 91, Stockholm Sweden. hellberg@physto.se
Fredrik
F
Hellberg
Vitali
V
Zhaunerchyk
Anneli
A
Ehlerding
Wolf D
WD
Geppert
Mats
M
Larsson
Richard D
RD
Thomas
Mark E
ME
Bannister
Eric
E
Bahati
C Randy
CR
Vane
Fabian
F
Osterdahl
Petr
P
Hlavenka
Magnus
M
af Ugglas