The effect of spin-orbit coupling on molecular properties: potential energy curve, transition dipole moment and laser cooling scheme of NH

2021 ◽  
pp. 120578
Author(s):  
Yunguang Zhang ◽  
Qihao Wang ◽  
Simin Ni ◽  
Lingling Ji ◽  
Zhanli Cao ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Potential Energy ◽  
Laser Cooling ◽  
Potential Energy Curve ◽  
Transition Dipole Moment ◽  
Molecular Properties ◽  
Energy Curve ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Transition Dipole

Multireference calculations of potential energy and transition dipole moment surfaces for first and second UV absorption bands of N2O

2014 ◽  
Vol 13 (02) ◽  
pp. 1450020
Author(s):  
Mohammad Noh Daud
Keyword(s):  
Dipole Moment ◽  
Potential Energy ◽  
Excited States ◽  
Transition Dipole Moment ◽  
Basis Set ◽  
Conical Intersections ◽  
Excitation Energies ◽  
Absorption Bands ◽  
Transition Dipole ◽  
Vertical Excitation

A great deal of theoretical work has been carried out to investigate the properties of the six lowest singlet electronic states of N 2 O molecule: the ground state X 1A′; the excited states 11A′′, 21A′, 21A′′, 31A′ and 31A′′. Multireference configuration interaction (MRCI) approach has been used to compute the full-dimensional potential energy surfaces of the six lowest states employing aug-cc-pVQZ minus g orbital basis set. It was found that such of highly accurate potential yields excellent results of bond dissociation and vertical excitation energies in comparison with the experimental values. Several important symmetry and nonsymmetry related conical intersections in linear and bent geometries have been discussed. Of particular interest is the location of conical intersections between the 21A′(1Δ) and 31A′(1Π) states, and between the 11A′′(1Σ-) and 31A′′(1Π) states in linear geometry, as well as conical intersection between the X 1A′ and 21A′ states in bent geometry. The corresponding transition dipole moment surfaces have also been computed, connecting the ground electronic state to the lowest five excited states. Detailed discussion on the vector properties of the dipole transition has been presented specifically in the vicinity of the conical intersections.

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