https://doi.org/10.1007/s100530170030
Energy transfer among color centers in LiF crystals
1
ENEA, Divisione Fisica Applicata, Centro Ricerche Frascati,
C.P. 65, 00044 Frascati, Rome, Italy
2
Faculty of Engineering, Kyoto Sangyo University,
Kamigamo, Kyoto 603-8555, Japan
Corresponding author: a baldacchini@frascati.enea.it
Received:
25
June
2001
Revised:
16
July
2001
Published online: 15 November 2001
In colored LiF crystals there are many absorption and emission bands which cover a wide
region of the spectrum from 200 up to 1 300 nm without breaking the continuity. In the frame
of these favourable conditions we have performed some experiments of energy transfer among
various color centers. The results indicate the existence of efficient exchanges of radiative
energy among several bands by using only one exciting wavelength. In particular, the
emissions of the F
and F
color centers centered at 900 and 1 100 nm, respectively, have
been observed by pumping at 672 nm completely outside their absorption bands.
PACS: 61.72.Ji – Point defects (vacancies, interstitials, color centers, etc.) and defect clusters / 78.40.Ha – Other nonmetallic inorganics / 78.55.Fv – Solid alkali halides
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001
