Direct Determination of the Sign of the NO Dipole Moment

A. Gijsbertsen, W. Siu, M. F. Kling, P. Johnsson, P. Jansen, S. Stolte, and M. J. J. Vrakking
Phys. Rev. Lett. 99, 213003 – Published 20 November 2007

Abstract

We report a novel approach for determining the sign of permanent dipole moments, using nitric oxide [NO(v=0)] as an example. State-selected NO (j=|m|=|Ω=1/2) molecules are focused using a hexapole and oriented in a strong dc electric field. The angular distributions of ionic fragments resulting from extreme ultraviolet single-photon and multiphoton dissociative ionization at 400 and 800 nm are measured and indicate that the dipole moment is negative (corresponding to NO+). The experiments thus rule out an error in the sign of the dipole of NO as the possible source of a remarkable discrepancy between previous theoretical and experimental work on orientation effects in bimolecular collisions involving oriented NO.

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  • Received 6 July 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.213003

©2007 American Physical Society

Authors & Affiliations

A. Gijsbertsen1,2, W. Siu1, M. F. Kling1, P. Johnsson1, P. Jansen2, S. Stolte2, and M. J. J. Vrakking1

  • 1FOM Institute for Atomic and Molecular Physics (AMOLF), Kruislaan 407, 1098 SJ Amsterdam, The Netherlands
  • 2Laser Center and Department of Physical Chemistry, Vrije Universiteit Amsterdam, De Boelelaan 1083, 1081 HV Amsterdam, The Netherlands

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Vol. 99, Iss. 21 — 23 November 2007

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