Eur. Phys. J. D 38, 99-101 (2006)
https://doi.org/10.1140/epjd/e2006-00039-9

Molecular orientation dependence of ortho-para H₂ conversion on Fe(OH)₃ cluster induced by hyperfine contact interaction

¹ Department of Precision Science & Technology and Applied Physics, Osaka University, Suita, Osaka, 565-0871, Japan
² Center for the Promotion of Research on Nanoscience and Nanotechnology, Toyonaka, Osaka, 560-8531, Japan
³ Physics Department, De La Salle University, Taft Ave., 1004 Manila, Philippines
⁴ Department of Physics, Osaka University, Toyonaka, Osaka, 565-0043, Japan
⁵ Institute of Industrial Science, The University of Tokyo, Meguro-ku, Tokyo, 153-8505, Japan

Corresponding author: ^a rifki@dyn.ap.eng.osaka-u.ac.jp

Received: 1 August 2005
Revised: 20 October 2005
Published online: 21 February 2006

Abstract

We investigate the molecular orientation dependence of the (o)rtho-(p)ara H₂ conversion on Fe(OH)₃ cluster. Taking Fermi's contact interaction as perturbation, we find that the o-p H₂ conversion yield for the molecular orientation angle θ= 10^○ with respect to the surface normal is larger than that for θ= 70^○.