scholarly journals Scrambling of Rydberg states by thermal radiation

Nature ◽  
1979 ◽  
Vol 279 (5713) ◽  
pp. 476-476
Author(s):  
Peter Knight
Keyword(s):  
Thermal Radiation ◽  
Rydberg States

Broadening of energy levels of Rydberg states with small orbital angular momenta in group IIb ions by ambient thermal radiation

2021 ◽  
Vol 51 (6) ◽  
pp. 511-517
Author(s):  
Igor Leonidovich Glukhov ◽  
Aleksandr Anatolievich Kamenski ◽  
V D Ovsiannikov
Keyword(s):  
Thermal Radiation ◽  
Energy Levels ◽  
Rydberg States ◽  
Angular Momenta

A CASSCF/MRCI study of the low-lying Rydberg states of ClO

2000 ◽  
Vol 98 (12) ◽  
pp. 793-806 ◽  
Author(s):  
Ian C. Lane, Andrew J. Orr-Ewing
Keyword(s):  
Rydberg States

MQDT operatorial formalism analysis of molecular Rydberg states in weak electric fields : application to Na2

1991 ◽  
Vol 1 (8) ◽  
pp. 875-897 ◽  
Author(s):  
P. F. Brevet ◽  
Ch. Bordas ◽  
M. Broyer ◽  
G. Jalbert ◽  
P. Labastie
Keyword(s):  
Electric Fields ◽  
Rydberg States

Characterizing the convective heat exchange with plastic shading nets under natural arid conditions

2019 ◽  
pp. 11-20
Author(s):  
Ahmed M Abdel-Ghanya ◽  
Ibrahim M Al-Helal
Keyword(s):  
Wind Speed ◽  
Thermal Radiation ◽  
Convective Heat ◽  
Convective Heat Transfer Coefficient ◽  
Convective Heat Exchange ◽  
Radiative Properties ◽  
Wooden Frame ◽  
Arid Conditions ◽  
Air Temperatures ◽  
Radiation Fluxes

Plastic nets are extensively used for shading purposes in arid regions such as in the Arabian Peninsula. Quantifying the convection exchange with shading net and understanding the mechanisms (free, mixed and forced) of convection are essential for analyzing energy exchange with shading nets. Unlike solar and thermal radiation, the convective energy, convective heat transfer coefficient and the nature of convection have never been theoretically estimated or experimentally measured for plastic nets under arid conditions. In this study, the convected heat exchanges with different plastic nets were quantified based on an energy balance applied to the nets under outdoor natural conditions. Therefore, each net was tacked onto a wooden frame, fixed horizontally at 1.5-m height over the floor. The downward and upward solar and thermal radiation fluxes were measured below and above each net on sunny days; also the wind speed over the net, and the net and air temperatures were measured, simultaneously. Nets with different porosities, colors and texture structures were used for the study. The short and long wave’s radiative properties of the nets were pre-determined in previous studies to be used. Re and Gr numbers were determined and used to characterize the convection mechanism over each net. The results showed that forced and mixed convection are the dominant modes existing over the nets during most of the day and night times. The nature of convection over nets depends mainly on the wind speed, net-air temperature difference and texture shape of the net rather than its color and its porosity.

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