Nonmonotonic distribution of population of the a(3)Sigma(+)(u) triplet state rotational levels in corona discharge in cryogenic helium gas

作者：Bonifaci N; Atrazhev V M^*; Shakhatov V A; Boltnev R E; von Haeften K; Eloranta J

来源：High Temperature, 2017, 55(3): 326-333.

DOI：10.1134/S0018151X1703004X

We observed the spectra within the wavelength range of 910-990 nm of emission of the corona discharge in supercritical helium gas at 6-11 K. This spectral range contains the molecular bands of the He*(2) excimer radiative transitions (c I-3 pound (g) (+) ac' a I-3 pound (u) (+) ) between the electron-vibrational-rotational levels of the c I-3 pound (g) (+) and the a I-3 pound (u) (+) triplet states. We have determined the populations of the rotational levels (quantity of molecules in the given excited state among the excited molecules of the discharge) of the c I-3 pound (g) (+) excited state from experimental values of the intensity of the respective electron-vibrational-rotational lines. The calculated population distribution is nonmonotonous. The population of the level with the rotation quantum number K' = 18 (the level number) is higher than those of the levels with the other K' values.

• 出版日期2017-5