Laser photoionization mass-spectroscopic ultrasensitive detection of rare isotopes

The combination of methods of time-of-flight mass-spectroscopic resonant photoionization with laser ablation has been realized. It gives a possibility of essential simplifying and shortening the procedure of samples preparation, and, compared to α-spectroscopy, increasing sensitivity of elements registration (for Pb the sensitivity is 10-12 g/g with isotopic resolution). Application of the methodic s may help in gathering more detailed information about the situation with α-nuclides polluted soils and meal,in particular, with Pu isotopes