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Laser excitation and electric field dissociation spectroscopy of the HD+ ion

✍ Scribed by Alan Carrington; Iain R. McNab; Christine A. Montgomerie

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
447 KB
Volume
151
Category
Article
ISSN
0009-2614

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✦ Synopsis

We describe a new technique for detecting the infrared spectra of molecular ions in levels close to dissociation. Laser excitation ofan ion beam is followed by passage through a strong electric field, which selectively dissociates high-lying Icvcls. For the 21,2-17,3 transition of HD ' we obtain four orders-of-magnitude increase in sensitivity compared with our earlier method based upon photodissociation.

This improvement arises from the effkiency of electric field dissociation, and the separation of protons produced by field dissociation from other fragment ions. The high sensitivity cnablcs us to improve the spectral resolution, revealing further hypertine interactions.

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