About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Paper
M-center fluorescence in NaCl and KI crystals
Abstract
The first excited singlet state Icirc;u+ of the M center fluoresces in the near infrared. This fluorescence has been observed at low temperatures and the decay time found to be 41 nsec for NaCl and 60 nsec for KI. In KI, a maximum time (5 nsec) is established for filling the Icirc;u+ state from a higher-excited state Πu. In addition, the fluorescence spectrum of the M center in KI is reported for the first time. At ∼ 10°K, the fluorescence intensity peaks at 0.818 eV = 1.52 μ and has a half-width of 0.100 eV. © 1971 The American Physical Society.