title: Impurity nuclear spin-lattice relaxation suppression and charge exchange of chromium ions in a gamma-irradiated ruby crystal.
abstract: The possibility of directly separating and measuring the impurity and lattice contributions to nuclear spin-lattice relaxation under the condition of a steady-state magnetic saturation is demonstrated in the particular case of 27Al nuclei in a gamma-irradiated ruby crystal. Contributions from trivalent and charge-exchanged chromium ions to impurity nuclear relaxation were separated. The number of charge-exchanged chromium ions was found. The spin relaxation time of Cr4+ centers was estimated.
authors.affiliation: Institute of Physics, St. Petersburg State University, St. Petersburg, 198904, Russia.
authors.forename: A
authors.initials: A
authors.lastname: Chandoul
authors.forename: E V
authors.initials: EV
authors.lastname: Charnaya
authors.forename: A A
authors.initials: AA
authors.lastname: Kuleshov
authors.forename: V M
authors.initials: VM
authors.lastname: Mikushev
authors.forename: A M
authors.initials: AM
authors.lastname: Ulyashev
mesh_terms: D002857:Chromium / Q000737:chemistry* / Q000528:radiation effects*; D003460:Crystallization; D005720:Gamma Rays; D007474:Ion Exchange; D009682:Magnetic Resonance Spectroscopy
chemical_list: D002857:Chromium