Etude de la distribution angulaire des électrons éjectés de la molécule d'azote lors de l'interaction He* (21S, 23S) + N2

Tuffin, F.; Nadan, A. Le; Peresse, J.

doi:10.1051/jphys:01985004602018100

Cited by 9 publications

(6 citation statements)

References 4 publications

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“…The question of hybridization that has been discussed by several authors [18][19][20][21][22] would show up in several respects in the matrix elements in equation (6). Firstly, hybridization would affect the shape of φ N , the electronic wave function of the entrance channel, in particular it would affect the shape of the excited electron of A * which is part of φ N .…”

Section: Discussionmentioning

confidence: 99%

“…The angular distributions of electrons ejected in the PI process were first measured by Hotop and Niehaus [2], Ebding and Niehaus [3] in thermal collisions of He * (2 3 S, 2 1 S,) with Ar, Kr, Xe, Hg, CO, N 2 and later by Tuffin [4][5][6]. Niehaus et al [2,3] found the laboratory angular distributions strongly anisotropic in some collision systems with the maximum probability for electron emission pointing backwards towards the direction of the He * -approach.…”

Section: Introductionmentioning

confidence: 99%

“…Its trajectory includes the angle θ with the direction of the He * -beam. The experiments mentioned above were carried out without specifying either the collision energy or the energy of the emitted electron [2][3][4][5][6]. Naturally there are two experimental ways to retrieve more detailed information.…”

Section: Introductionmentioning

confidence: 99%

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Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He(2¹S)+Ar, Kr, Xe and He(2³S)+Hg

Zimmermann¹,

Morgner²

2014

J. Phys. B: At. Mol. Opt. Phys.

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Angular distributions of electrons emitted in thermal collisions of He*(23S, 21S) + Ar, Kr, Xe and He*(23S) + Hg have been measured. The angular distributions are given as the angle dependent intensities integrated over the entire electron energy range associated with a particular final state of the ion and as electron energy dependent intensities. Also collision-energy-resolved angular distributions for He*(21S) + Ar, Kr, Xe and He*(23S) + Hg were performed and a pronounced dependence of the laboratory angular distributions on the energy of the emitted electrons was observed in these systems. We can explain this effect with different internal angular distributions for different electron energies, which are much more structured than the laboratory angular distributions, as the different orientations of the molecular axis during the collision process tend to smooth out any structure in the internal distributions. By measuring doubly differentially with respect to the electron energy and collision energy experimental conditions can set to approximately measure the internal angular distribution. From symmetry considerations we further conclude that the exchange mechanism is the dominant process for Penning ionization and that the radiative mechanism is not relevant in the He (21S) collision systems.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He(2¹S)+Ar, Kr, Xe and He(2³S)+Hg

Zimmermann¹,

Morgner²

2014

J. Phys. B: At. Mol. Opt. Phys.

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“…Dans la relation (2), E[(R,oo) reprisente l'inergie cinitique relative des particules lourdes lorsqu'elles ont quitti la rdgion d'interaction, et Ec(oo) l'inergie cinitique relative dans la voie d'entrie.…”

Section: Dispositif Expdrimentalunclassified

“…Une premiAre sdrie d'dtudes rialisies sur CO iii, N2 [2], H2 [3] en mesurant l'Anergie des ilectrons ijectis nous a permis de priciser en particulier l'itat quantique des ions CD+, N), H) criis. Nous avons ensuite itudii CD2 [4,5,7] et CD [6], et montri, par une analyse conjointe de l'inergie des ilectrons djectis et des ions criis, la voie dlectronique par Yee [8], Cermak [9], Ohno [10], Haug [iii, et par notre laboratoire [12].…”

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Etude des mécanismes d'ionisation de H₂O par interaction He^(2 ¹S, 2 ³S)/Ne^(³P₀, ³P₂)+H₂O

Nadan¹,

Sinou²,

Tuffin³

1993

J. Phys. II France

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Nous avons étudié l'ionisation Penning de H2O par des métastables 21S et 23S de l'hélium, ainsi que 3P0 et 3P2 du néon. Nous avons analysé l'énergie cinétique des ions créés au cours de la collision (parents et fragments). Afin d'interpréter certaines particularités expérimentales, l'hypothèse de transferts d'énergie de vibration en énergie cinétique est proposées. Par ailleurs, les caractéristiques des distributions en énergie des ions fragments sont expliquées par la prédissociation de l'état 2B2 de H2O+

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Excitation transfer collisions of metastable Ar, Kr and Xe* atoms with N2 (X, ν = 0 ): collision energy dependence of excitation cross sections and product vibrational distribution of N2(C 3Πu, ν′ = 0, 1, 2, 3)

et al. 1990

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Etude de la distribution angulaire des électrons éjectés de la molécule d'azote lors de l'interaction He* (21S, 23S) + N2

Cited by 9 publications

References 4 publications

Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He(2¹S)+Ar, Kr, Xe and He(2³S)+Hg

Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He(2¹S)+Ar, Kr, Xe and He(2³S)+Hg

Etude des mécanismes d'ionisation de H₂O par interaction He^(2 ¹S, 2 ³S)/Ne^(³P₀, ³P₂)+H₂O

Excitation transfer collisions of metastable Ar, Kr and Xe* atoms with N2 (X, ν = 0 ): collision energy dependence of excitation cross sections and product vibrational distribution of N2(C 3Πu, ν′ = 0, 1, 2, 3)

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Etude de la distribution angulaire des électrons éjectés de la molécule d'azote lors de l'interaction He* (21S, 23S) + N2

Cited by 9 publications

References 4 publications

Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He*(21S)+Ar, Kr, Xe and He*(23S)+Hg

Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He*(21S)+Ar, Kr, Xe and He*(23S)+Hg

Etude des mécanismes d'ionisation de H2O par interaction He*(2 1S, 2 3S)/Ne*(3P0, 3P2)+H2O

Excitation transfer collisions of metastable Ar*, Kr* and Xe* atoms with N2 (X, ν = 0 ): collision energy dependence of excitation cross sections and product vibrational distribution of N2(C 3Πu, ν′ = 0, 1, 2, 3)

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Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He(2¹S)+Ar, Kr, Xe and He(2³S)+Hg

Strong angular dependence on the electron energy in the angular distribution of Penning electrons for He(2¹S)+Ar, Kr, Xe and He(2³S)+Hg

Etude des mécanismes d'ionisation de H₂O par interaction He^(2 ¹S, 2 ³S)/Ne^(³P₀, ³P₂)+H₂O

Excitation transfer collisions of metastable Ar, Kr and Xe* atoms with N2 (X, ν = 0 ): collision energy dependence of excitation cross sections and product vibrational distribution of N2(C 3Πu, ν′ = 0, 1, 2, 3)