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The magnetic hyperfine structure in the rotational spectrum of H2CNH

L. Dore, L. Bizzocchi, C. Degli Esposti, J. Gauss

Abstract
The hyperfine structure in the ground-state rotational spectrum of methanimine was studied in the frequency range of 64ľ172 GHz by means of the Lamb-dip technique. This allowed to resolve, in some hyperfine components due to the 14N nucleus, doublets separated by only some tenth of kHz. We explain the splittings as due to magnetic interactions of the three protons with their molecular environment. The analysis of the experimental spectrum has been guided by quantum-chemical calculations of the hyperfine parameters.

Keywords
Rotational: spectroscopy - Hyperfine: structure - Lamb-dip: spectroscopy - Quantum-chemical: calculations

Journal of Molecular Spectroscopy
Volume 261, Number 1, Page 44
2010 September

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Instituto de Astrof├şsica e Ci├¬ncias do Espa├žo Universidade do Porto Faculdade de Ciências da Universidade de Lisboa Funda├ž├úo para a Ci├¬ncia e a Tecnologia
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