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- W2019293933 abstract "Formation times of F centers (τ F ) and self-trapped excitons (τ S T E ) in RbBr crystals have been measured under the excitation by two photon absorption of second harmonics from a mode-locked ruby laser. Such excitation produces the 2 p hot exciton directly in the crystal. τ F is 27 ±8 ps at RT and 30 ±8 ps at LHeT. τ S T E is not explicitly observed, but appears to be around 30 ps. Absorption spectra measured at about 100 ps after the excitation coincide to that of the conventional F band at RT, and consist mainly of the F band and of a small contribution of the self-trapped excitons at LHeT. τ F at RT and τ S T E at LHeT in RbI are both 30 ±10 ps. Possibly τ F in KBr at RT was 20 ±10 ps, but the absorption decayed with a time constant of 800 ±200 ps. The relaxation process of the 2 p hot exciton in RbBr is discussed in connection with the formation of self-trapped excitons and F centers." @default.
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- W2019293933 date "1979-07-01" @default.
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- W2019293933 title "Relaxation of 2p Excitons and F Center Formation in Picosecond Range in RbBr, RbI and KBr" @default.
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- W2019293933 doi "https://doi.org/10.1143/jpsj.47.184" @default.
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