Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 53, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6455/ab78ab
Keywords
soft x-rays; photoabsorption spectroscopy; molecular plasmas
Categories
Funding
- Education, Audio-visual and Culture Executive Agency (EACEA) Erasmus Mundus Joint Doctorate Programme EXTATIC [2013 0033]
- Science Foundation Ireland [16/RI/3696]
- EU H2020 COST Action [CA17126]
- SEAI [19/RDD/556]
- National Science Centre, Poland [UMO-2016/23/B/ST7/00949]
- Science Foundation Ireland (SFI) [16/RI/3696] Funding Source: Science Foundation Ireland (SFI)
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We report oxygen K-shell photoabsorption measurements in CO2 plasmas, using a table-top laser produced plasma soft x-ray (SXR) and extreme ultraviolet source. Significant differences are observed between the photoabsorption spectra of the neutral CO2 molecule and photoionized CO2 plasmas, as new spectral features emerge in the case of the latter. These features are attributed to photoexcitation in O, O+, O2+ species identified with the aid of calculations performed with the Cowan suite of atomic structure codes. Such signatures of atomic ions in the photoionized plasma point to the fragmentation of the parent molecule upon absorption of an SXR photon.
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