Chemiluminescent ion-molecule rections of N+ ions with H2, CH4, C2H4, C2H6, C3H8

Kusunoki, Isao; Ottinger, Ch.; Simonis, J.

doi:10.1016/0009-2614(76)85426-7

Cited by 20 publications

(27 citation statements)

References 13 publications

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“…The NH(A) chemiluminescence intensity from reaction (1a) was then related to that from (3a), for which the excitation function was taken from Fig. 2 in [22]. The latter data take into account the energy dependent fraction of the total ion current which is effective for the observed CL intensity.…”

Section: Methodsmentioning

confidence: 99%

“…Of these, only the CH(A-X) bands are quantitatively considered in this work. By relating their intensity to that of NH(A-X), the CH(A-X) emission is then also normalized to the NH(A) yield given in [22] as a common standard. All intensities were obtained by integration over the appropriate wavelength interval.…”

Section: Methodsmentioning

confidence: 99%

“…The ionic reactions (3) were studied by us a long time ago (see [22][23][24], where observed spectra and their computer simulations are given as well as the cross sections as functions of the collision energy (Ôexcitation functionsÕ)). To ensure a reliable comparison with reactions (1) and (2), the ionic reactions (3) were remeasured using the apparatus in the present configuration.…”

Section: Introductionmentioning

confidence: 99%

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Hot-atom chemiluminescence: a beam study of the N*(2D)+CH4 system

Kowalski

Pranszke

Ottinger³

2004

Chemical Physics Letters

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Fast N( 2 D) atoms colliding with CH 4 at 10-200 eV CM yield CH(A,B), NH(A) and H(n P 4) emission. From 10 to 50 eV CM the CH yield decreases, exceeding greatly that for N( 4 S) and N þ ( 3 P) + CH 4 collisions. This indicates N( 2 D) insertion. Above 50 eV CM the CH yield increases again, approaching the values found with N( 4 S) and N þ ( 3 P). Here the CH formation is chemically unspecific (ÔshatteringÕ). The NH(A) yield decreases monotonically for all three projectiles. N( 2 D) insertion is here unimportant, in contrast to NH(X) from N( 2 D) + CH 4 . At E CM >50 eV CM , all projectiles give NH(A) according to the Ôbilliard ballÕ model.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hot-atom chemiluminescence: a beam study of the N*(2D)+CH4 system

Kowalski

Pranszke

Ottinger³

2004

Chemical Physics Letters

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“…With few exceptions [15] it is generally true of ion-molecule exchange reactions that their cross section does not extend towards very high impact energy. For several endothermic luminescent reactions studied by us (N++H2, [16,17]; C++H2, [18]; N+ +NO, [19]; B++H2, [20]; A1 + +H 2 and P++H2, [,21]) we have found a rather sharp cross section maximum above threshold, followed by a fast fall-off. Also, Ar § +H 2 ~ArH + +H is a prototype stripping reaction [22,24] (with some modifications, [-25]), and Henglein has shown [26] that for this type of reaction mechanism an upper limit exists for the impact energy.…”

Section: B Ground State Ar + Reactionsmentioning

confidence: 98%

L ? emission from Ar++H2 collisions in the threshold energy region

Ottinger¹,

Yang²

1985

Z Physik A

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In the energy range 2.4 to 33.3 eVcra, relative cross sections have been measured for L~ emission from impact of Ar § ions in a beam on a H 2 gas target. Absolute cross sections, obtained by normalization to literature data, are 1-10 x 10 -16 cm 2 for metastable Ar § and 1-20x10-18cm 2 for ground state Ar § In the former case, the dominant mechanism is probably dissociative electronic energy transfer, while in the latter case dissociative charge transfer is the most likely process. In addition,~at the lowest energies L~ resulting from a chemiluminescent rearrangement Ar++ H 2--, ArH + +H(2p) has been observed.

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“…Rotational distributions assumed in simulation calculations were thermal with T=45,000"K (c) and 1000°K (~d ) . '~~1% for NH produced in the reaction The Role of Excited States in Ion-Neutral Collisions N + + RH-R+ + NH(A 'II) (IV.17)These reactions were also the first reported examples of nonadiabatic luminescent reactions exhibiting quite large cross sections ( < 10% of the gas kinetic cross section) 444. …”

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confidence: 99%