scholarly journals Collision Broadening in the Inversion Spectrum of Methyl Chloride at Pressures up to Two Atmospheres

1964 ◽  
Vol 17 (2) ◽  
pp. 175 ◽  
Author(s):  
CH Burton ◽  
WB Lasich ◽  
JH Noon ◽  
RW Parsons
Keyword(s):  
Absorption Coefficient ◽  
Methyl Chloride ◽  
Wave Number ◽  
Pressure Broadening ◽  
Power Absorption ◽  
Rotational States ◽  
Theoretical Predictions ◽  
Collision Broadening ◽  
Three Body

The power absorption coefficient a of microwaves of wave number v = 0� 333cm-1 by methyl chloride at 33� 7�C has been studied at pressures up to 2 atm, and the results are compared with theoretical predictions. Discrepancies which have previously been attributed to the effect of transitions between low.lying rotational states are shown to be due to three� body collisions. The collision diameter for pressure broadening of theinversion transition in methyl chloride is found to be 8�6 A; this is significantly larger an the figure of 7 . 2 A reported by earlier workerswho neglected the effect of three-body ollisions.

Einfluß der Rotation auf die Lebensdauer prädissoziierender Moleküle

1971 ◽  
Vol 26 (3) ◽  
pp. 538-546 ◽  
Author(s):  
F. J. Comes ◽  
G. Schumpe
Keyword(s):  
High Resolution ◽  
Excellent Agreement ◽  
Rotational Motion ◽  
Absorption Lines ◽  
Rare Gases ◽  
Rotational States ◽  
Theoretical Predictions ◽  
Line Widths

Abstract The D 1∏u - X1∑g+system of H2 and D2 shows strong predissociation. High resolution m easurements on the line widths of isolated absorption lines have been carried out, showing the influence of rotation on the predissociation probability of the corresponding rotational states. Their lifetime decreases with increasing rotation of the molecule and with decreasing mass due to the coupling of electronic and rotational motion. Both results are in excellent agreement with theoretical predictions given by Kronig. The shape of the absorption lines broadened by predissociation was found to be typically asymmetric. They are of the Beutler type, well known form the autoionisation of the rare gases.

TWO-DIMENSIONAL WANG–LANDAU SAMPLING OF AN ASYMMETRIC ISING MODEL

2009 ◽  
Vol 20 (09) ◽  
pp. 1357-1366 ◽  
Author(s):  
SHAN-HO TSAI ◽  
FUGAO WANG ◽  
D. P. LANDAU
Keyword(s):  
Phase Diagram ◽  
Ising Model ◽  
External Field ◽  
Density Of States ◽  
Triangular Lattice ◽  
Sampling Method ◽  
Two Dimensional ◽  
Theoretical Predictions ◽  
The Spectator ◽  
Three Body

We study the critical endpoint behavior of an asymmetric Ising model with two- and three-body interactions on a triangular lattice, in the presence of an external field. We use a two-dimensional Wang–Landau sampling method to determine the density of states for this model. An accurate density of states allowed us to map out the phase diagram accurately and observe a clear divergence of the curvature of the spectator phase boundary and of the derivative of the magnetization coexistence diameter near the critical endpoint, in agreement with previous theoretical predictions.

Functional dependence of the lower hybrid power absorption coefficient in JET

1997 ◽  
Vol 39 (7) ◽  
pp. 1115-1128 ◽  
Author(s):  
V Pericoli-Ridolfini ◽  
A Ekedahl ◽  
Y Baranov ◽  
J A Dobbing ◽  
B Fischer ◽  
...  
Keyword(s):  
Absorption Coefficient ◽  
Functional Dependence ◽  
Lower Hybrid ◽  
Power Absorption ◽  
Hybrid Power

Absorption coefficient of Dupont Teflon FEP in the 20–130 wave-number range

1985 ◽  
Vol 24 (17) ◽  
pp. 2746 ◽  
Author(s):  
Mark A. Ordal ◽  
Robert J. Bell ◽  
Ralph W. Alexander ◽  
Raymond E. Paul
Keyword(s):  
Absorption Coefficient ◽  
Wave Number ◽  
Number Range ◽  
Wave Number Range

scholarly journals Theoretical Predictions of Low-Lying Three-Body Resonance States in 6He

1995 ◽  
Vol 94 (3) ◽  
pp. 343-352 ◽  
Author(s):  
S. Aoyama ◽  
S. Mukai ◽  
K. Kato ◽  
K. Ikeda
Keyword(s):  
Resonance States ◽  
Theoretical Predictions ◽  
Three Body

Experimental observations of overstable cellular convection

1959 ◽  
Vol 253 (1273) ◽  
pp. 212-217
Keyword(s):  
Detailed Analysis ◽  
Wave Number ◽  
Coriolis Forces ◽  
Characteristic Period ◽  
Hexagonal Pattern ◽  
Convective Circulation ◽  
Theoretical Predictions

In this paper, experimental observations of the overstable cellular convection which occurs in a layer of mercury heated uniformly from below, and subject to Coriolis forces, is described. The observations confirm Chandrasekhar’s theoretical predictions regarding the wave number of the cells and of the characteristic period of the oscillatory motions. A detailed analysis of the movement of tracers clearly illustrates the periodic reversal of the convective circulation and the hexagonal pattern of the convection cells.

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