TY  - JOUR
AU  - McManus, Joseph W.
AU  - Walmsley, Tiffany
AU  - Nagaya, Kiyonobu
AU  - Harries, James R.
AU  - Kumagai, Yoshiaki
AU  - Iwayama, Hiroshi
AU  - Ashfold, Michael N. R.
AU  - Britton, Mathew
AU  - Bucksbaum, Philip H.
AU  - Downes-Ward, Briony
AU  - Driver, Taran
AU  - Heathcote, David
AU  - Hockett, Paul
AU  - Howard, Andrew J.
AU  - Kukk, Edwin
AU  - Lee, Jason Wai Lung
AU  - Liu, Yusong
AU  - Milesevic, Dennis
AU  - Minns, Russell S.
AU  - Niozu, Akinobu
AU  - Niskanen, Johannes
AU  - Orr-Ewing, Andrew J.
AU  - Owada, Shigeki
AU  - Rolles, Daniel
AU  - Robertson, Patrick A.
AU  - Rudenko, Artem
AU  - Ueda, Kiyoshi
AU  - Unwin, James
AU  - Vallance, Claire
AU  - Burt, Michael
AU  - Brouard, Mark
AU  - Forbes, Ruaridh
AU  - Allum, Felix
TI  - Disentangling sequential and concerted fragmentations of molecular polycations with covariant native frame analysis
JO  - Physical chemistry, chemical physics
VL  - 24
IS  - 37
SN  - 1463-9076
CY  - Cambridge
PB  - RSC Publ.
M1  - PUBDB-2022-06289
SP  - 22699 - 22709
PY  - 2022
AB  - We present results from an experimental ion imaging study into the fragmentation dynamics of 1-iodopropane and 2-iodopropane following interaction with extreme ultraviolet intense femtosecond laser pulses with a photon energy of 95 eV. Using covariance imaging analysis, a range of observed fragmentation pathways of the resulting polycations can be isolated and interrogated in detail at relatively high ion count rates (∼12 ions shot<sup>−1</sup>). By incorporating the recently developed native frames analysis approach into the three-dimensional covariance imaging procedure, contributions from three-body concerted and sequential fragmentation mechanisms can be isolated. The angular distribution of the fragment ions is much more complex than in previously reported studies for triatomic polycations, and differs substantially between the two isomeric species. With support of simple simulations of the dissociation channels of interest, detailed physical insights into the fragmentation dynamics are obtained, including how the initial dissociation step in a sequential mechanism influences rovibrational dynamics in the metastable intermediate ion and how signatures of this nuclear motion manifest in the measured signals.
LB  - PUB:(DE-HGF)16
C6  - pmid:36106844
UR  - <Go to ISI:>//WOS:000854649200001
DO  - DOI:10.1039/D2CP03029B
UR  - https://bib-pubdb1.desy.de/record/484476
ER  -