Research output: Contribution to journal › Article › peer-review
Excitation transfer from Ar to H2 in a gas-discharge plasma. / Lavrov, B. P.; Mel'nikov, A. S.
In: Optics and Spectroscopy (English translation of Optika i Spektroskopiya), Vol. 85, No. 5, 01.12.1998, p. 666-671.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Excitation transfer from Ar to H2 in a gas-discharge plasma
AU - Lavrov, B. P.
AU - Mel'nikov, A. S.
PY - 1998/12/1
Y1 - 1998/12/1
N2 - Spectral distributions of the emission intensity over a range of 200-400 nm, where the dissociation continuum (a3 ∑+g → b3 ∑+u) of a hydrogen molecule is located, are measured in a hollow-cathode glow-discharge plasma of mixtures of hydrogen with argon, neon, and krypton at pressures of 0.8 to 10 torr. The continuum shape is found to be substantially dependent on the ratio of constituents of the Ar-H2 mixture. Within the limits of experimental accuracy, the shape of the continuum of a mixture of hydrogen with neon and krypton is the same as that of pure hydrogen. The experiments carried out with the active phase and afterglow of the discharge demonstrated that a change in the continuum shape in the presence of argon results from the excitation transfer from long-lived excited states of argon atoms to H2 molecules. Possible excitation transfer mechanisms are analyzed. It is shown that, if energy considerations are used the rotational and translational energies of an H2 molecule should be taken into account.
AB - Spectral distributions of the emission intensity over a range of 200-400 nm, where the dissociation continuum (a3 ∑+g → b3 ∑+u) of a hydrogen molecule is located, are measured in a hollow-cathode glow-discharge plasma of mixtures of hydrogen with argon, neon, and krypton at pressures of 0.8 to 10 torr. The continuum shape is found to be substantially dependent on the ratio of constituents of the Ar-H2 mixture. Within the limits of experimental accuracy, the shape of the continuum of a mixture of hydrogen with neon and krypton is the same as that of pure hydrogen. The experiments carried out with the active phase and afterglow of the discharge demonstrated that a change in the continuum shape in the presence of argon results from the excitation transfer from long-lived excited states of argon atoms to H2 molecules. Possible excitation transfer mechanisms are analyzed. It is shown that, if energy considerations are used the rotational and translational energies of an H2 molecule should be taken into account.
UR - http://www.scopus.com/inward/record.url?scp=0346597922&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0346597922
VL - 85
SP - 666
EP - 671
JO - OPTICS AND SPECTROSCOPY
JF - OPTICS AND SPECTROSCOPY
SN - 0030-400X
IS - 5
ER -
ID: 36195469