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First glimpse of 3-screw pumps shaping up

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
102 KB
Volume
1999
Category
Article
ISSN
0262-1762

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A study of the spectroscopic properties of PbFS+ GeO, t WO, vitroceramics doped with Tm'+ and codoped with Yb" and Tm'+ ions upon 680 nm dye laser light excitation is made. The up-conversion emission and excitation spectra have been measured at room temperature. An enhancement of blue emission cente