Browsing by Author "Ma, Q."
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CAUSAL CORRELATION FUNCTIONS AND FOURIER TRANSFORMS: APPLICATION IN CALCULATING PRESSURE INDUCED SHIFTS
Ma, Q.; Tipping, R. H.; Lavrentieva, N. N. ( 2012 )By adopting a concept from signal processing, instead of starting from the correlation functions which are even, one considers the causal correlation functions whose Fourier transforms become complex. Their real and ... 
EXPERIMENTAL AND THEORETICAL STUDY OF WATERVAPOR CONTINUUM ABSORPTION IN THE THZ REGION FROM 0.3 TO 2.7 THZ
Podobedov, V. B.; Plusquellic, D. F.; Siegrist, K.; Fraser, G. T.; Ma, Q.; Tipping, R. H. ( 2007 )Experimental results and theoretical calculations of the continuum absorption by water vapor in the farIR region from 10 to 90 cm$^{1}$ (0.3 to 2.7 THz) are presented for the temperature range from 293 to 333 K. The ... 
MODIFICATIONS OF THE ROBERTBONAMY FORMALISM AND FURTHER REFINEMENT CHALLENGES
Ma, Q.; Tipping, R. H.; Boulet, C. ( 2006 )We present two modifications of the RobertBonamy (RB) formalism that has been widely used for calculating Lorentzian halfwidths and shifts for decades. The first one comes from a correction of their derivation when ... 
PREDICTED INTENSITY OF THE $S_{o} (O) + S_{o} (O) + S_{o} (O)$ TRIPLE TRANSITION IN THE INFRARED SPECTRUM OF SOLID ORTHODEUTERIUM
Tipping, R. H.; Ma, Q.; Poll, J. D. ( 1990 )The predicted intensity of a new absorption feature in the spectrum of solid $oD_{2}$ corresponding to three molecules making simultaneous rotational transitions from $J = 0$ to $J = 2$ is calculated. This transition ... 
REFINEMENT OF THE ROBERTBONAMY FORMALISM: TAKING INTO ACCOUNT OF CONTRIBUTIONS FROM THE LINE COUPLING
Ma, Q.; Boulet, C.; Tipping, R. H. ( 2013 )The RobertBonamy (RB) formalism , 923 (1979).} contains several approximations whose applicability has not been thoroughly justified. One of them is that lines of interest are well separated. When these authors develop ... 
RULES APPLICABLE FOR SPECTROSCOPIC PARAMETERS OF H$_2$O TRANSITIONS INVOLVING HIGH J STATES
Ma, Q.; Tipping, R. H. ( 2011 )Two basic rules applicable for H$_2$O transitions involving high J states have been discovered. The origins of these rules are quantum properties of H$_2$O rotational states with their J values above certain boundaries. ... 
A SIMPLE ANALYTICAL PARAMETERIZATION FOR THE WATER VAPOR MILLIMETER WAVE FOREIGN CONTINUUM
Ma, Q.; Tipping, R. H. ( 2003 )We present a theoretical calculation of the millimeter wave foreign continuum due to colliding pairs of $H_{2}O  N_{2}$ molecules. It is based on the Lanczos algorithm, and the resulting tridiagonal matrix is written in ... 
TEMPERATURE DEPENDENCES OF MECHANISMS RESPONSIBLE FOR THE WATER VAPOR CONTINUUM
Ma, Q.; Tipping, R. H.; Leforestier, C. ( 2009 )The watervapor continuum plays an important role in the radiation balance in the Earth's atmosphere. While this absorption has been known for a long time, the physical mechanism responsible is still an open problem. We ... 
THEORETICAL CALCULATION OF THE N$_2$ BROADENED HALFWIDTHS OF H$_2$O
Ma, Q.; Tipping, R. H.; Gamache, R. R. ( 2009 )The water molecule is the most important Greenhouse gas and thus plays a pivotal role in atmospheric spectra. In addition to accurate intensities and frequencies, one also needs accurate self and foreign halfwidths and ... 
THEORETICAL CALCULATION OF THE N$_2$ BROADENED HALFWIDTHS OF H$_2$O
Tipping, R. H.; Ma, Q. ( 2010 )For many applications, in addition to accurate spectral line frequencies and intensities one needs accurate Lorentzian parameters (halfwidths, pressure shifts, and their temperature dependencies). Because of the importance ...