Laser detection of the rare isotope (3)He at concentrations as low as 10(-9).
The method of collinear laser photoionization of atoms in a modulated fast beam is used to detect the rare isotope (3)He, with high-repetition-rate lasers being applied to improve the detection sensitivity. The method has made it possible to detect (3)He at relative abundances as low as 10(-9).
Aseyev
S A
SA
Kudryavtsev
Y A
YA
Letokhov
V S
VS
Petrunin
V V
VV