Isotopes of $^{100}$Mo, $^{82}$Se and experiments NEMO, MOON, AMoRE

Double beta decay is a very rare nuclear decay and has double and neutrinoless modes of decay. This article describe the search of neutrinoless double beta decay in modern experiments NEMO, MOON, AMoRE. In these experiments are used different type of detectors and methods of registration, so the search for this decay have a different sensitivity to its half-life. The article also discussed the detectors, their features and prospects for their modernization for increasing sensitivity to neutrinoless beta decay.