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Negative-ion/positi...
Negative-ion/positive-ion coincidence spectroscopy as a tool to identify anionic fragments : The case of core-excited CHF3
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- Kivimäki, Antti (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,Nano and Molecular Systems Research Unit, University of Oulu, 90014 Oulu, Finland; MAX IV Laboratory, Lund University, 22100 Lund, Sweden
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- Stråhlman, Christian (författare)
- Malmö universitet,Malmö University,Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,Institutionen för materialvetenskap och tillämpad matematik (MTM),MAX IV Laboratory, Lund University, 22100 Lund, Sweden
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- Sankari, Rami (författare)
- Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,MAX IV Laboratory, Lund University, 22100 Lund, Sweden; Surface Science Group, Laboratory of Photonics, Physics Unit, Tampere University, 33014 Tampere, Finland
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- Richter, Robert (författare)
- Elettra-Sincrotrone Trieste, 34149 Trieste, Italy
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(creator_code:org_t)
- 2020-02-21
- 2020
- Engelska.
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Ingår i: Journal of Mass Spectrometry. - : Wiley. - 1076-5174 .- 1096-9888. ; 55:5
- Relaterad länk:
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http://dx.doi.org/10...
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http://jultika.oulu....
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We have studied the dissociation of the trifluoromethane molecule, CHF3, into negative ionic fragments at the C 1s and F 1s edges. The measurements were performed by detecting coincidences between negative and positive ions. We observed five different negative ions: F−, H−, C−, CF−, and F2 −. Their production was confirmed by the analysis of triple coincidence events (negative-ion/positive-ion/positive-ion or NIPIPI coincidences) that were recorded with cleaner signals than those of the negative-ion/positive-ion coincidences. The intensities of the most intense NIPIPI coincidence channels were recorded as a function of photon energy across the C 1s and F 1s excitations and ionization thresholds. We also observed dissociation channels involving the formation of one negative ion and three positive ions. Our results demonstrate that negative-ion/positive-ion coincidence spectroscopy is a very sensitive method to observe anions, which at inner-shell edges are up to three orders of magnitude less probable dissociation products than cations.
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- C 1s
- CHF
- core ionization and excitation
- F 1s
- ion-ion coincidence techniques
- negative ions
- photodissociation
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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