Spectroscopy of alkali atoms and molecules in superfluid helium

1993 ◽  
Vol 71 (7) ◽  
pp. 1035-1038 ◽  
Author(s):  
Y. Takahashi ◽  
K. Sano ◽  
T. Kinoshita ◽  
T. Yabuzaki
Keyword(s):  
Superfluid Helium ◽  
Atoms And Molecules ◽  
Alkali Atoms

Inelastic collisions between excited alkali atoms and molecules. V. Sensitized fluorescence in mixtures of sodium with N2, H2, HD, and D2

1968 ◽  
Vol 46 (19) ◽  
pp. 2127-2131 ◽  
Author(s):  
M. Stupavsky ◽  
L. Krause
Keyword(s):  
Cross Sections ◽  
Ground State ◽  
Resonance Effect ◽  
Excitation Transfer ◽  
Inelastic Collisions ◽  
Sodium Vapor ◽  
Sensitized Fluorescence ◽  
Atoms And Molecules ◽  
Alkali Atoms ◽  
Exciting Beam

3 2P1/2 ↔ 3 2P3/2 excitation transfer in sodium, induced in inelastic collisions with ground-state N2, H2, HD, and D2 molecules, has been investigated in a series of sensitized fluorescence experiments. Mixtures of sodium vapor at a pressure of 5 × 10−7 Torr, and the gases, were irradiated with each NaD component in turn, and the fluorescence which contained both D components was monitored at right angles to the direction of the exciting beam. Measurements of the relative intensities of the NaD fluorescent components yielded the following collision cross sections for excitation transfer. For Na–N2 collisions: Q12(2P1/2 → P3/2) = 144 Å2, Q21(2P1,2 ← 2P3/2) = 76 Å2 for Na–H2 collisions: Q12 = 80 Å2, Q21 = 42 Å2. For Na–HD collisions: Q12 = 84 Å2, Q21 = 44 Å2. For Na–D2 collisions: Q12 = 98 Å2, Q21 = 52 Å2. The cross sections Q21 exhibit a slight resonance effect between the atomic and molecular rotational transitions.

Dynamics of electronically excited alkali atoms in superfluid helium

1996 ◽  
Vol 46 (S1) ◽  
pp. 359-360 ◽  
Author(s):  
Toshiya Kinoshita ◽  
Koichi Fukuda ◽  
Toru Matsuura ◽  
Tsutomu Yabuzaki
Keyword(s):  
Superfluid Helium ◽  
Alkali Atoms ◽  
Electronically Excited

Injection of Atoms and Molecules in a Superfluid Helium Fountain: Cu and Cu2Hen(n= 1, ..., ∞)

2011 ◽  
Vol 115 (25) ◽  
pp. 7077-7088 ◽  
Author(s):  
Esa Vehmanen ◽  
Vahan Ghazarian ◽  
Courtney Sams ◽  
Isahak Khachatryan ◽  
Jussi Eloranta ◽  
...  
Keyword(s):  
Superfluid Helium ◽  
Atoms And Molecules

Spectroscopy of alkali atoms and molecules attached to liquid He clusters

1995 ◽  
Vol 98 (3) ◽  
pp. 413-416 ◽  
Author(s):  
F. Stienkemeier ◽  
J. Higgins ◽  
W. E. Ernst ◽  
G. Scoles
Keyword(s):  
Atoms And Molecules ◽  
Alkali Atoms

Inelastic Collisions Between Excited Alkali Atoms and Molecules X. Temperature Dependence of Cross Sections for 2P1/2↔2P3/2 Mixing in Cesium, Induced in Collisions with Deuterated Hydrogens, Ethanes, and Propanes

1974 ◽  
Vol 52 (7) ◽  
pp. 589-591 ◽  
Author(s):  
E. Walentynowicz ◽  
R. A. Phaneuf ◽  
L. Krause
Keyword(s):  
Energy Transfer ◽  
Temperature Dependence ◽  
Isotope Effect ◽  
Cross Sections ◽  
Rotational Energy ◽  
Inelastic Collisions ◽  
Atoms And Molecules ◽  
Rotational Energy Transfer ◽  
Alkali Atoms ◽  
The Cross

The dependence on temperature of the cross sections for 2P1/2 ↔ 2P3/2 mixing in cesium, induced in collisions with various deuterated hydrogen, ethane and propane molecules, has been studied in the range 290–650 K. In the cases of hydrogen and ethane, the behavior of the cross sections was found to depend on the degree of deuteration of the molecules. The very large sizes of the mixing cross sections and the isotope effect observed in their variation with temperature, are ascribed to the phenomenon of electronic to rotational energy transfer.

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