PMID:18233214
| Citation |
Gijsbertsen, A, Siu, W, Kling, MF, Johnsson, P, Jansen, P, Stolte, S and Vrakking, MJ (2007) Direct determination of the sign of the NO dipole moment. Phys. Rev. Lett. 99:213003 |
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| 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|=|Omega=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 N-O+). 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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