High-resolution CW resonance ionization mass spectrometry
Abstract
We have used continuous-wave (CW) lasers to produce efficient, isotopically selective ionization of barium in the source region of a quadrupole mass spectrometer. The technique involves two low-power, high-resolution dye lasers for the resonance steps and a 100 watt CW Nd:YAG laser for photoionization. The use of CW lasers offers both better duty cycle and much better resolution than is possible with pulsed lasers. We have observed an isotopic selectivity of 800 between (137)Ba and (138)Ba in the CW resonance process. Ionization efficiency is estimated to be about 10(-4) and simple improvements should improve this value to near unity.
- Publication:
-
Presented at the 28th Oak Ridge National Laboratory Conference on Analytical Chemistry
- Pub Date:
- September 1985
- Bibcode:
- 1985anch.confQ....W
- Keywords:
-
- Barium Isotopes;
- Continuous Radiation;
- Dye Lasers;
- Excitation;
- High Resolution;
- Ionization;
- Mass Spectroscopy;
- Neodymium Lasers;
- Resonance;
- Data Acquisition;
- Experimentation;
- Photoionization;
- Lasers and Masers