title: Luminescence of singlet self-trapped excitons in MgF(2).
abstract: Fast (τ∼1.7 ns) broadband (full width at half-maximum = 1.1 eV) vacuum ultraviolet (VUV; hν = 8.4 eV) luminescence from MgF(2) crystals has been detected at low temperature (T<80 K) and analyzed with techniques of cathodoluminescence and time-resolved VUV spectroscopy using synchrotron radiation. The VUV emission discovered has been attributed to the luminescence of spin-singlet self-trapped excitons (STEs). In contrast to the case for alkaline earth fluoride crystals with fluorite structure, the luminescence of the singlet STEs in MgF(2) shows smaller Stokes shift than that of the triplet STEs, which is similar to 'typical' behavior observed for alkali halide crystals.
authors.affiliation: Physics Department, M V Lomonosov Moscow State University, 119992 Moscow, Russia.
authors.forename: V N
authors.initials: VN
authors.lastname: Kolobanov
authors.forename: V V
authors.initials: VV
authors.lastname: Mikhailin
authors.forename: S P
authors.initials: SP
authors.lastname: Chernov
authors.forename: D A
authors.initials: DA
authors.lastname: Spassky
authors.forename: V N
authors.initials: VN
authors.lastname: Makhov
authors.forename: M
authors.initials: M
authors.lastname: Kirm
authors.forename: E
authors.initials: E
authors.lastname: Feldbach
authors.forename: S
authors.initials: S
authors.lastname: Vielhauer