Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Volume 167,number 1,2 CHEMICAL PHYSICS LETTERS 16March 1990 DETERMINATION OF THE GROUND-STATE LANDI? FACTOR
 

Summary: Volume 167,number 1,2 CHEMICAL PHYSICS LETTERS 16March 1990
DETERMINATION OF THE GROUND-STATE LANDI? FACTOR
FOR DIATOMIC MOLECULES BY A BEAT-RESONANCE METHOD
M.P. AUZIN'SH, K.A. NASYROV, M.Ya. TAMANIS, R.S. FERBER and A.M. SHALAGIN
PeterStuchka Latvian State University, 226098 Riga, USSR
Received 22 July 1989;in final form 2 January 1990
Non-linear resonance of quantum beats under harmonically modulated excitation in a magnetic field is considered as a method
of determining the Landt factor for a single electronic-vibrational-rotational (EVR) level of a diatomic molecule in its electronic
ground state. The role of the sign of the Land4 factor in the ground and excited levels, stimulated emission and "fly-through"
relaxation conditions are analysed using a semiclassical description of the beat resonance signal in laser-induced fluorescence.
Refined Land&factor values of EVR levels of "I&(X `X: ) and ?`es(XO: ) are obtained by means of fitting experimental
signals.
1. Introduction
As a rule, the orbital and spin angular momenta of diatomic molecules in the ground state have zero-value
projection on the molecular axis. In this case magnetism may be due to nuclear rotation, as well as to non-
adiabatic term interaction (the "electronic" contribution). In this connection experimental data on LandC g
factors of separate rovibronic levels are of considerable interest. g factor measurements of such states are based
on the optical pumping effect [ 11 (in the sense of orientation or alignment) of the lower EVR level in the
process of its depopulation, e.g. in the process of optical absorption. During absorption, coherence between
magnetic sublevels of the ground state is created, which is transferred by the same light field to the excited

  

Source: Auzinsh, Marcis - Department of Physics, University of Latvia

 

Collections: Physics