SOME OPTICAL PROPERTIES OF NEW LUMINOPHORS ACTIVATED BY ELEMENTS OF THE RARE EARTH GROUP (in Polish)
Journal Article
·
· Postepy Fizyki (Poland)
OSTI ID:4170929
Observation of luminophors activated by Nd, Pr, Sm, Dy, Eu, and Tm shows the appearance of absorptions of a linear character in the visible spectrum. By the application of radiation with a wave length corresponding to these lines a weak luminescence was induced (also of a linear type) in ZnS-Er at room and low termperatures and in ZnS-Dy and ZnS at liquid nitrogen temperature. The strong luminescence of luminophors activated by lanthanides is not connected with any absorption of light by these activators. The influence of oxygen on the luminescence and excitation spectra of Zn-Sm was observed in the spectrum of ZnS and Sm (1.9 x 10/sup -4/ g-atom Sm/mol ZnS) dried at 300 deg C in a stream of N purified of oxygen and then heated in a stream of N at 1150 deg C. The ZnS-Sm luminescence spectrnm produced by radiation of wave length lambda = 365 m mu consists of three lines: red, orange, and green; red is most intense. Introduction of ZnO causes the appearance of an additional wide green strip. It is concluded that with ZnO introduction (2.4 x 10/sup -2/ mole ZnO/mole ZnS) the number of primary centers of luminescence in which the Sm ion was surrounded by S ions decreases and the number of centers where O replaced S increases. Introduction of other anions, such as selenium, to ZnS also causes changes in the luminescence spectrum. (JPRS)
- Research Organization:
- Lebedev Inst. of Physics, Academy of Sciences, USSR
- NSA Number:
- NSA-14-014212
- OSTI ID:
- 4170929
- Journal Information:
- Postepy Fizyki (Poland), Journal Name: Postepy Fizyki (Poland) Vol. Vol: 9; ISSN PSTFA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Polish
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