Summary: Eur. Phys. J. D 11, 9197 (2000)
PHYSICAL JOURNAL D
Societ`a Italiana di Fisica
Alignment-orientation conversion in molecules in an external
magnetic field caused by a hyperfine structure
J. Alnis and M. Auzinsha
Department of Physics, University of Latvia, 19 Rainis blvd., Riga LV-1586, Latvia
Received 15 July 1999 and Received in final form 17 November 1999
Abstract. The paper presents a discussion on the problem of alignment-orientation conversion in an excited
state of molecules. It is shown that a rather strong alignment-orientation conversion effect in the excited
molecular state can be caused by a joint action of an external magnetic field and hyperfine interaction. The
orientation thus created is transverse, i.e. perpendicular to the direction of the external magnetic field.
The magnitude of this effect is analyzed as dependent on molecular parameters.
PACS. 32.60.+i Zeeman and Stark effects 32.10.Fn Fine and hyperfine structure
Usually, if an ensemble of atoms or molecules is excited by