The laser cooling transition of silicon atoms was observed in a discharge with a hollow cathode containing silicon using the third harmonic coherent light of a nanosecond Ti:sapphire laser. The optogalvanic spectrum obtained was investigated by scanning the wavelength of the coherent light from 250.3 nm to 253.3 nm. Four lines originating from the 3s23p2 3P → 3s23p4s 3P0 transition of silicon atoms were observed in the spectrum, while the spectral resolution was limited to 0.1 nm by the linewidth of the coherent light. Optogalvanic signals increased in intensity as the discharge current decreased. This spectroscopic technique will help us to address the accurate frequency of the light source for the laser cooling of silicon atoms.
|ジャーナル||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|出版ステータス||Published - 1 2月 2004|