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@ARTICLE{Gaire:186127,
author = {Gaire, B. and Lee, S. Y. and Haxton, D. J. and Pelz, P. M.
and Bocharova, I. and Sturm, F. P. and Gehrken, N. and
Honig, M. and Pitzer, M. and Metz, D. and Kim, H.-K. and
Schöffler, M. and Dörner, R. and Gassert, H. and Zeller,
S. and Voigtsberger, J. and Cao, W. and Zohrabi, M. and
Williams, J. and Gatton, A. and Reedy, D. and Nook, C. and
Mueller, Thomas and Landers, A. L. and Cocke, C. L. and
Ben-Itzhak, I. and Jahnke, T. and Belkacem, A. and Weber,
Th.},
title = {{P}hoto-double-ionization of ethylene and acetylene near
threshold},
journal = {Physical review / A},
volume = {89},
number = {1},
issn = {1050-2947},
address = {College Park, Md.},
publisher = {APS},
reportid = {FZJ-2015-00215},
pages = {013403},
year = {2014},
abstract = {We present kinematically complete measurements of the
photo-double-ionization of ethylene (double CC bond) and
acetylene (triple CC bond) hydrocarbons just above the
double-ionization threshold. We discuss the results in terms
of the coincident kinetic energy of the photoelectrons and
the nuclear kinetic-energy release of the recoiling ions. We
have incorporated quantum chemistry calculations to
interpret which of the electronic states of the dication
have been populated and trace the various subsequent
fragmentation channels. We suggest pathways that involve the
electronic ground and excited states of the precursor
ethylene dication and explore the strong influence of the
conical intersections between the different electronic
states. The nondissociative ionization yield is small in
ethylene and high in acetylene when compared with the
dissociative ionization channels. The reason for such a
striking difference is explained in part on the basis of a
propensity rule that influences the population of states in
the photo-double-ionization of a centrosymmetric
closed-shell molecule by favoring singlet ungerade and
triplet gerade final states. This propensity rule and the
calculated potential-energy surfaces clarify a picture of
the dynamics leading to the observed dication dissociation
products.},
cin = {JSC},
ddc = {530},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {411 - Computational Science and Mathematical Methods
(POF2-411)},
pid = {G:(DE-HGF)POF2-411},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000332172700008},
doi = {10.1103/PhysRevA.89.013403},
url = {https://juser.fz-juelich.de/record/186127},
}