DISSOCIATIVE RECOMBINATION OF VIBRATIONALLY COLD CH+3AND INTERSTELLAR IMPLICATIONS
نویسندگان
چکیده
منابع مشابه
Dissociative recombination of cold H D 3 and its interstellar implications
H3 plays a key role in interstellar chemistry as the initiator of ion–molecule chemistry. The amount of H3 observed in dense interstellar clouds is consistent with expectations, but the large abundance of H3 seen in diffuse clouds is not easily explained by simple chemical models. A crucial parameter in predicting the abundance of H3 in diffuse clouds is the rate constant for dissociative recom...
متن کاملDissociative recombination of rotationally cold H
This paper presents the first dissociative recombination (DR) measurement of electrons with rotationally and vibrationally cold H3 + ions. A dc discharge pinhole supersonic jet source was developed and characterized using infrared cavity ringdown spectroscopy before installation on the CRYRING ion storage ring for the DR measurements. Rotational state distributions sTrot,30 Kd produced using th...
متن کاملDissociative recombination angular distributions
The angular distributions of the products of dissociative recombination of diatomic molecular ions are derived. The distributions are determined by the dominant partial waves of the captured electrons. For a single dominant wave, the neutral product distribution is described by the same spherical harmonic that describes the electron partial wave. The derived distributions take into account both...
متن کاملDissociative recombination of protonated methanol.
The branching ratios of the different reaction pathways and the overall rate coefficients of the dissociative recombination reactions of CH3OH2+ and CD3OD2+ have been measured at the CRYRING storage ring located in Stockholm, Sweden. Analysis of the data yielded the result that formation of methanol or deuterated methanol accounted for only 3 and 6% of the total rate in CH3OH2+ and CD3OD2+, res...
متن کاملStorage ring measurements of the dissociative recombination rate of rotationally cold H + 3
We present dissociative recombination measurements, using the CRYRING ion storage ring, of H3 ions produced in a supersonic expansion discharge source. Before and after the CRYRING measurements, the ion source was characterized in Berkeley using infrared cavity ringdown spectroscopy, and was found to exhibit a typical rotational temperature of ∼ 30 K. Our measurement of the dissociative recombi...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2012
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/758/1/55