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Symmetry Breaking of Angular Momentum Distribution of Diatomic Molecules in an External Field
 

Summary: Symmetry Breaking of Angular Momentum Distribution of Diatomic
Molecules in an External Field
Marcis Auzinsh
Department of Physics, University of Latvia, 19 Rainis boulevard, Riga, LV^1586, Latvia
Received September 16, 2000; accepted December 6, 2000
pacs ref: 33.55.Be
Abstract
If an ensemble of atoms or molecules is excited by linearly polarized light,
then usually one expects linearly polarized £uorescence form the ensemble.
This re£ects a symmetry of the excitation process, namely the fact that
the electric ˘eld in a light wave and consequently the angular momentum
distribution of atoms or molecules in an excited state can be characterized
by a double headed arrow @ A. An ensemble of particles in an excited
state possesses a net alignment. In this paper some processes that for
molecules in an external ˘eld can break this symmetry are reviewed. As a
result of symmetry breaking the ensemble of molecules acquires a net
orientation of angular momentum, that can be characterized by a single
headed arrow A, and one can expect a circularly polarized £uorescence
from this ensemble.
1. Introduction

  

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

 

Collections: Physics