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    Chlorine-bearing species and the 37Cl/35Cl isotope ratio in the coma of comet 67P/Churyumov-Gerasimenko

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    Authors
    Dhooghe, F.
    De Keyser, J.
    Hänni, N.
    Altwegg, K.
    Cessateur, G.
    Jehin, E.
    Maggiolo, R.
    Rubin, M.
    Wurz, P.
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    Discipline
    Physical sciences
    Subject
    comets
    67P/Churyumov–Gerasimenko
    Audience
    Scientific
    Date
    2021
    Metadata
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    Description
    A full-mission analysis has been conducted of Cl-bearing species in the coma of comet 67P/Churyumov–Gerasimenko as detected by the Double Focusing Mass Spectrometer (DFMS) of Rosetta's ROSINA instrument. The isotope ratio of the two stable chlorine isotopes 37Cl/35Cl is found to be 0.336 ± 0.017, to be compared with the standard mean ocean chloride value of 0.320. The isotope ratio does not change appreciably throughout the mission. The Cl-bearing species fingerprint in DFMS indicates that there is at least one additional chlorine-bearing species in the coma next to HCl, CH3Cl, and NH4Cl. The identity of this volatile or semivolatile species is unknown at this time.
    Citation
    Dhooghe, F.; De Keyser, J.; Hänni, N.; Altwegg, K.; Cessateur, G.; Jehin, E.; Maggiolo, R.; Rubin, M.; Wurz, P. (2021). Chlorine-bearing species and the 37Cl/35Cl isotope ratio in the coma of comet 67P/Churyumov-Gerasimenko. , Monthly Notices of the Royal Astronomical Society, Vol. 508, Issue 1, 1020-1032, DOI: 10.1093/mnras/stab1732.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/8010
    doi: http://dx.doi.org/10.1093/mnras/stab1732
    scopus:
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
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