Long-distance ultraperipheral collisions of two relativistic ions are considered. Clouds of photons surrounding the ions are responsible for their distant electromagnetic interaction. The perturbative approach and the method of equivalent photons are described. It is shown that the total cross section of these collisions increases fast with an energy increase and is especially large for heavy ions. Some experimental data and their comparison with theoretical approaches are described. Further proposals are discussed.

Keywords: proton, nucleus, ultraperipheral interactions, cross section, form factor, impact parameter PACS: 12.20.−m, 25.75.−q, 34.50.−s (all) DOI: 10.3367/UFNe.2020.03.038741 URL: https://ufn.ru/en/articles/2020/8/b/ 000583209000002 2-s2.0-85087181423 2020PhyU...63..758D Citation: Dremin I M "Ultraperipheral nuclear interactions" Phys. Usp. 63 758–765 (2020) BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks Received: 19th, February 2020, revised: 24th, March 2020, accepted: 25th, March 2020 Оригинал: Дрёмин И М «Ультрапериферические взаимодействия ядер» УФН 190 811–819 (2020); DOI: 10.3367/UFNr.2020.03.038741