New experimental date on the far IR absorption spectra of solid oxygen in its a-, p-, and y-phases are presented. The conditions of generating IR-active optical modes in oxygen crystals is discussed. It is shown that the optical activity of the observed modes is due to the magneto-elastic interaction with the short-range magnetic order. npeJ(CTaBJIeHb1 HOBble 3KCIIepHMeHTaJIbHbIe naHHbIe 0 IIOrJIOIUeHHH TBepnOrO KHCJIOpOAa B AanbHef kiK o 6 n a c~~. kl3MepeHHX IIpOBeneHbI J(JIX Q-, p-H "/-$EL3 TBepAOrO KHCJIOpOna. O6CyXAaIoTCX @KTOpbI @OpMHpOBaHHX OIITHYeCKH aKTHBHbIX MOA B KpHCTaJIJIaX KHCJIOpOAa. nOKa3aH0, YTO OIITHYeCKaR aKTkiBHOCTb Ha6n€OAaeMbIX MOA 0 6 y c n o~n e~a MaTHUTOYIIPYTMM EJa5iMOnefCTEHeM npX HanHYHX 6 n a x~e r o MarHHTHOrO IIOpXnKa.
FIR spectra of a-nitrogen are discussed taking into account optical and mechanical anharmonicities. It is shown that the lattice absorption spectrum is mainly formed due to the optical anharmonicity. The two-phonon decay rates of IR-active modes are estimated from measured line halfwidths. I ) Lenin av. 47, SU-310164 Kharkov, USSR.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.