A review of recent papers on research on trapped ions cooled by laser radiation is given. Experiments are described on observing quantum jumps in atoms and on investigating antibunching and sub-Poisson statistics of photons of fluorescence radiation from single atoms. Experiments on phase transitions in a system of cold ions are discussed.

@article{Drabovich:1989,
	author = {K. N. Drabovich},
	title = {Trapped atomic particles in action},
	publisher = {Physics-Uspekhi},
	year = {1989},
	journal = {Phys. Usp.},
	volume = {32},
	number = {7},
	pages = {622-628},
	url = {https://ufn.ru/en/articles/1989/7/d/},
	doi = {10.1070/PU1989v032n07ABEH002736}
}