Field ionization of high-Rydberg fragments produced after inner-shell photoexcitation and photoionization of the methane molecule
(2015) In Journal of Chemical Physics 143(11).- Abstract
- We have studied the production of neutral high-Rydberg (HR) fragments from the CH4 molecule at the C 1s -> 3p excitation and at the C 1s ionization threshold. Neutral fragments in HR states were ionized using a pulsed electric field and the resulting ions were mass-analyzed using an ion time-of-flight spectrometer. The atomic fragments C(HR) and H(HR) dominated the spectra, but molecular fragments CHx(HR), x = 1-3, and H-2(HR) were also observed. The production of HR fragments is attributed to dissociation of CH4+ and CH42+ ions in HR states. Just above the C 1s ionization threshold, such molecular ionic states are created when the C 1s photoelectron is recaptured after single or double Auger decay. Similar HR states may be reached... (More)
- We have studied the production of neutral high-Rydberg (HR) fragments from the CH4 molecule at the C 1s -> 3p excitation and at the C 1s ionization threshold. Neutral fragments in HR states were ionized using a pulsed electric field and the resulting ions were mass-analyzed using an ion time-of-flight spectrometer. The atomic fragments C(HR) and H(HR) dominated the spectra, but molecular fragments CHx(HR), x = 1-3, and H-2(HR) were also observed. The production of HR fragments is attributed to dissociation of CH4+ and CH42+ ions in HR states. Just above the C 1s ionization threshold, such molecular ionic states are created when the C 1s photoelectron is recaptured after single or double Auger decay. Similar HR states may be reached directly following resonant Auger decay at the C 1s -> 3p resonance. The energies and geometries of the parent and fragment ions have been calculated in order to gain insight into relevant dissociation pathways. (C) 2015 AIP Publishing LLC. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8062361
- author
- Kivimaki, A. ; Sankari, Anna LU ; Kettunen, J. A. ; Stråhlman, Christian LU ; Ruiz, J. Alvarez and Richter, R.
- organization
- publishing date
- 2015
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Chemical Physics
- volume
- 143
- issue
- 11
- article number
- 114305
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- pmid:26395703
- wos:000361843900028
- scopus:84942162909
- pmid:26395703
- ISSN
- 0021-9606
- DOI
- 10.1063/1.4931105
- language
- English
- LU publication?
- yes
- id
- 015930b4-e47a-49f5-ac7a-05f709c7105f (old id 8062361)
- date added to LUP
- 2016-04-01 10:26:40
- date last changed
- 2022-01-25 23:15:05
@article{015930b4-e47a-49f5-ac7a-05f709c7105f,
abstract = {{We have studied the production of neutral high-Rydberg (HR) fragments from the CH4 molecule at the C 1s -> 3p excitation and at the C 1s ionization threshold. Neutral fragments in HR states were ionized using a pulsed electric field and the resulting ions were mass-analyzed using an ion time-of-flight spectrometer. The atomic fragments C(HR) and H(HR) dominated the spectra, but molecular fragments CHx(HR), x = 1-3, and H-2(HR) were also observed. The production of HR fragments is attributed to dissociation of CH4+ and CH42+ ions in HR states. Just above the C 1s ionization threshold, such molecular ionic states are created when the C 1s photoelectron is recaptured after single or double Auger decay. Similar HR states may be reached directly following resonant Auger decay at the C 1s -> 3p resonance. The energies and geometries of the parent and fragment ions have been calculated in order to gain insight into relevant dissociation pathways. (C) 2015 AIP Publishing LLC.}},
author = {{Kivimaki, A. and Sankari, Anna and Kettunen, J. A. and Stråhlman, Christian and Ruiz, J. Alvarez and Richter, R.}},
issn = {{0021-9606}},
language = {{eng}},
number = {{11}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Journal of Chemical Physics}},
title = {{Field ionization of high-Rydberg fragments produced after inner-shell photoexcitation and photoionization of the methane molecule}},
url = {{https://lup.lub.lu.se/search/files/8097739/Field_ionization_of_high_Rydberg_fragme...hotoionization_of_the_methane_molecule.pdf}},
doi = {{10.1063/1.4931105}},
volume = {{143}},
year = {{2015}},
}