Theoretical determination of the potassium far-wing photoabsorption spectra

Talbi, F; Bouledroua, M.; Alioua, Kamel

doi:10.1140/epjd/e2008-00204-2

Cited by 10 publications

(22 citation statements)

References 41 publications

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“…The final electronic state of H 2 is 1 Σ + g . Hence, taking the spin multiplicities into account (i.e., ignoring possible intersystem transitions to the CH + 3 singlet manifold), the lowest accessible symmetry of CH + is the a 3 Π electronic state (Talbi et al 1991;Bettens & Collins 1998). Putting it all together we can re-write reaction (3) as…”

Section: Merged-beams Rate Coefficientmentioning

confidence: 99%

“…Classical trajectory studies using quantum mechanical potential energy surfaces (PESs) have been used to calculate the thermal rate coefficient for this reaction in the range of 10 − 300 K (Talbi et al 1991;Bettens & Collins 1998, 2001. That semi-classical work takes into account the temperature dependence of both the translational motion and the internal energy of the C atom but assumes the H + 3 ion is in the ground state.…”

Section: Introductionmentioning

confidence: 99%

“…For reaction (5), Talbi et al (1991) calculate that it possesses a significant activation energy and will not proceed at typical molecular cloud temperatures. Bettens & Collins (1998, 2001, though, find that the reaction proceeds with no barrier at a rate a factor of ∼ 60 − 110 smaller than that for reaction (3).…”

Section: Introductionmentioning

confidence: 99%

“…As for reaction (6), it was not considered by either Talbi et al (1991) or Bettens & Collins (1998, 2001. Quite likely that is because in binary collisions the process can only proceed via radiative association.…”

Section: Introductionmentioning

confidence: 99%

“…Astrochemical databases use the Langevin value for the C + H + 3 reaction system. The only detailed calculations of which we are aware for this system are the semi-classical results of Talbi et al (1991) and Bettens & Collins (1998, 2001. Fully quantum mechanical scattering calculations for ion-neutral collision systems with 4 or more atoms appear to be just beyond current theoretical capabilities.…”

Section: Introductionmentioning

confidence: 99%

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REACTION STUDIES OF NEUTRAL ATOMIC C WITH ${{\rm{H}}}_{3}^{+}$ USING A MERGED-BEAMS APPARATUS

O'Connor

Urbain

Stützel

et al. 2015

ApJS

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We have investigated the chemistry of C + H + 3 forming CH + , CH + 2 , and CH + 3 . These reactions are believed to be some of the key gas-phase astrochemical processes initiating the formation of organic molecules in molecular clouds. For this work we have constructed a novel merged fast-beams apparatus which overlaps a beam of molecular ions onto a beam of ground-term neutral atoms. Here we describe the apparatus in detail and present cross section data for forming CH + and CH + 2 at relative energies from ≈ 9 meV to ≈ 20 and 3 eV, respectively. Measurements were performed for statistically populated C( 3 P J ) in the ground term reacting with hot H + 3 (at an internal temperature of ∼ 2, 550 K). Using these data we have derived rate coefficients for translational temperatures from ≈ 72 K to ≈ 2.3 ×10 5 and 3.4 ×10 4 K, respectively. For the formation of CH + 3 we are able only to put an upper limit on the rate coefficient. Our results for CH +

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Section: Merged-beams Rate Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

REACTION STUDIES OF NEUTRAL ATOMIC C WITH ${{\rm{H}}}_{3}^{+}$ USING A MERGED-BEAMS APPARATUS

O'Connor

Urbain

Stützel

et al. 2015

ApJS

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Division Xii / Commission 14 / Working Group Collision Processes

Peach¹,

Dimitrijević²

2011

Proc. IAU

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Research in atomic and molecular collision processes and spectral line broadening has been very active since our last report, Peach, Dimitrijević & Stancil 2009. Given the large volume of the published literature and the limited space available, we have attempted to identify work most relevant to astrophysics. Since our report can not be comprehensive, additional publications can be found in the databases at the web addresses listed in the final section. Elastic and inelastic collisions among electrons, atoms, ions, and molecules are included and charge transfer can be very important in collisions between heavy particles.

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