Associative Ionization in Slow Collisions of Atoms

Standard

Associative Ionization in Slow Collisions of Atoms. / Golubkov, G. V.; Devdariani, A. Z.

In: Russian Journal of Physical Chemistry B, Vol. 5, No. 6, 12.2011, p. 892-906.

Research output: Contribution to journal › Article › peer-review

Author

Golubkov, G. V. ; Devdariani, A. Z. / Associative Ionization in Slow Collisions of Atoms. In: Russian Journal of Physical Chemistry B. 2011 ; Vol. 5, No. 6. pp. 892-906.

BibTeX

@article{c98b3b7b97bd491980b568438798ae90,

title = "Associative Ionization in Slow Collisions of Atoms",

abstract = "An analysis of the modern theory of associative ionization (AI) is performed, and ways of its further development are discussed. The threshold behavior of the cross section of endothermic AI reactions is considered and it is shown that, in the quantum case, its dependence on the above-threshold energy E is strictly linear, i.e., significantly different from the E(3/2) law ensuing from the semiclassical theory. This has a simple explanation, since the matrix elements of the scattering operator are finite at E = 0 due to the tunneling effect. The possibility of describing the dynamics of an elementary AI event within the framework of the diffusion approximation is substantiated, and the conditions of applicability of the theory of {"}quantum chaos{"} to treating the spectrum of highly excited Rydberg molecules are examined. The quantum properties of the exothermic processes of AI and Penning ionization in the case of the states of the interacting atoms being autoionizing are discussed in detail. A comparison with the semiclassical theory is presented.",

keywords = "metastable and Rydberg states of atoms and ionization in slow collisions of atoms, the intermediate Rydberg complex, TEMPERATURE DISSOCIATIVE RECOMBINATION, DYNAMIC COUPLING PHENOMENA, MOLECULAR EXCITED-STATES, CHEMI-IONIZATION, ELECTRONS, IONS, H2",

author = "Golubkov, {G. V.} and Devdariani, {A. Z.}",

year = "2011",

month = dec,

doi = "10.1134/S199079311106008X",

language = "Английский",

volume = "5",

pages = "892--906",

journal = "Russian Journal of Physical Chemistry B",

issn = "1990-7931",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "6",

}

RIS

TY - JOUR

T1 - Associative Ionization in Slow Collisions of Atoms

AU - Golubkov, G. V.

AU - Devdariani, A. Z.

PY - 2011/12

Y1 - 2011/12

N2 - An analysis of the modern theory of associative ionization (AI) is performed, and ways of its further development are discussed. The threshold behavior of the cross section of endothermic AI reactions is considered and it is shown that, in the quantum case, its dependence on the above-threshold energy E is strictly linear, i.e., significantly different from the E(3/2) law ensuing from the semiclassical theory. This has a simple explanation, since the matrix elements of the scattering operator are finite at E = 0 due to the tunneling effect. The possibility of describing the dynamics of an elementary AI event within the framework of the diffusion approximation is substantiated, and the conditions of applicability of the theory of "quantum chaos" to treating the spectrum of highly excited Rydberg molecules are examined. The quantum properties of the exothermic processes of AI and Penning ionization in the case of the states of the interacting atoms being autoionizing are discussed in detail. A comparison with the semiclassical theory is presented.

AB - An analysis of the modern theory of associative ionization (AI) is performed, and ways of its further development are discussed. The threshold behavior of the cross section of endothermic AI reactions is considered and it is shown that, in the quantum case, its dependence on the above-threshold energy E is strictly linear, i.e., significantly different from the E(3/2) law ensuing from the semiclassical theory. This has a simple explanation, since the matrix elements of the scattering operator are finite at E = 0 due to the tunneling effect. The possibility of describing the dynamics of an elementary AI event within the framework of the diffusion approximation is substantiated, and the conditions of applicability of the theory of "quantum chaos" to treating the spectrum of highly excited Rydberg molecules are examined. The quantum properties of the exothermic processes of AI and Penning ionization in the case of the states of the interacting atoms being autoionizing are discussed in detail. A comparison with the semiclassical theory is presented.

KW - metastable and Rydberg states of atoms and ionization in slow collisions of atoms

KW - the intermediate Rydberg complex

KW - TEMPERATURE DISSOCIATIVE RECOMBINATION

KW - DYNAMIC COUPLING PHENOMENA

KW - MOLECULAR EXCITED-STATES

KW - CHEMI-IONIZATION

KW - ELECTRONS

KW - IONS

KW - H2

U2 - 10.1134/S199079311106008X

DO - 10.1134/S199079311106008X

M3 - статья

VL - 5

SP - 892

EP - 906

JO - Russian Journal of Physical Chemistry B

JF - Russian Journal of Physical Chemistry B

SN - 1990-7931

IS - 6

ER -

ID: 74050408