Abstract
The afterglow of a discharge in helium with a small admixture of hydrogen is studied spectroscopically (p=40 Torr, [e]≤1011 cm−3). The time-resolved measurements of intensities of the first four lines of the Balmer series are performed. The concentrations of metastable helium atoms and molecules are evaluated from the relative intensity of the absorption lines. The ratios of excitation transfer rates from atoms He(2 3 S 1) k 1(n) and molecules of helium He2(a 2sσ 3Σ +u ) k 2(n) to atomic hydrogen H*(n) are measured to be k 1(n=3)/k 2(n=3)=0.04±0.02 and k 1(n=4)/k 2(n=4)=0.01±0.02. The ratios of excitation rate constants k 2(n) corresponding to different states H(n) are measured to be k 1(n=4)/k 2(n=3)=0.023±0.01; k 1(n=5)/k 2(n=3)≤0.013; and k 1(n=6)/k 2(n=3)≤0.007.
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References
S. Takao, M. Kogoma, T. Oka, et al., J. Chem. Phys. 73, 148 (1980).
V. A. Ivanov and Yu. É. Skoblo, Excitation Transfer in He-H2 Plasma., 29 EGAS, 535 (1997).
R. Deloche, P. Monchicourt, M. Cheret, et al., Phys. Rev. A 13, 1140 (1976).
V. A. Ivanov and Yu. É. Skoblo, Zh. Éksp. Teor. Fiz. 106, 1704 (1994).
G. H. Diecke and E. S. Robinson, Phys. Rev. 80, 1 (1950).
A. C. G. Mitchell and M. W. Zemanskii, Resonance Radiation and Excited Atoms (Cambridge, 1961).
S. É. Frish, Optical Spectra of Atoms [in Russian] (Gos. Izd. Fiz.-Mat. Lit., Moscow, 1963).
I. Ya. Fugol’, D. A. Myshkis, and O. I. Grigorashchenko, Opt. Spektrosk. 31, 525 (1971).
M. L. Ginter and R. Battino, J. Chem. Phys. 52, 4469 (1970).
A. Kono and S. Hattori, Phys. Rev. A 29, 2981 (1984).
J. Stevefelt and F. Robben, Phys. Rev. A 5, 1502 (1972).
F. Robben, Phys. Rev. A 5, 1516 (1972).
D. R. Bates and A. Damgaard, Philos. Trans. R. Soc. London A 242, 101 (1949).
J.-C. Gauthier, J.-P. Geindre, J.-P. Moy, et al., Phys. Rev. A 13, 1781 (1976).
J. Stevefelt, J. M. Pouvesle, and A. Bouchoule, J. Chem. Phys. 76, 4006 (1982).
B. P. Lavrov and M. V. Tyutchev, Acta Phys. Hung. 55, 441 (1984).
G. Maers and A. J. Cunningham, J. Chem. Phys. 67, 1942 (1977).
N. N. Besuglov, A Handbook on Constants of Elementary Processes Involving Atoms, Ions, Electrons, and Photons [in Russian], Ed. by A. G. Zhiglinskii (Izd. St. Petersburg Univ., St. Petersburg, 1994), pp. 312–334.
L. C. Pitchford and R. Deloche, J. Chem. Phys. 68, 1185 (1978).
K. P. Huber and G. Herzberg, Molecular Spectra and Molecular Structure: IV. Constants of Diatomic Molecules (Van Nostrand Reinhold, New York, 1979; Mir, Moscow, 1984).
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Translated from Optika i Spektroskopiya, Vol. 88, No. 2, 2000, pp. 185–191.
Original Russian Text Copyright © 2000 by Skoblo, Ivanov.
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Skoblo, Y.É., Ivanov, V.A. Role of metastable atoms and molecules of helium in excitation transfer to hydrogen atoms. Opt. Spectrosc. 88, 151–157 (2000). https://doi.org/10.1134/1.626770
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DOI: https://doi.org/10.1134/1.626770