Intracavity Laser Absorption Spectra of Nickel Hydride

Astronomy and Astrophysics – Astronomy

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Molecular Data, Stars: Chemically Peculiar

Scientific paper

The visible electronic spectrum of the nickel hydride B2Δ5/2-X2Δ5/2(1,0) and A2Δ5/2-X2Δ5/2(1,0) transitions have been recorded with rotational resolution by intracavity laser absorption spectroscopy. The gas-phase NiH molecules were produced in an electric discharge using a nickel hollow cathode in a pure hydrogen atmosphere at 2-3 torr total pressure. Peak positions for NiH isotopologues are presented for both the transitions. 58NiH and 60NiH have been observed in sunspots and attempts to observe NiH in stellar spectra are underway.

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