The luminescence of Sm2+ in SrB4O7 was studied as a function of temperature
from 10 K up to 600 K. According to the high-resolution spectra of Sm2+ in
matrix at 10 K, the line numbers of D-5(0)-F-7(J) transitions were 1, 3, 5
for J = 0, 1, 2, respectively. The D-5(1)-F-7(J) (J = 0, 1, 2) transitions
were observed at high temperature. The intensities of D-5(0)-F-7(J) transi
tions increased up to 400 K and then decreased with increase in temperature
. 4f(5)d(1)-4f(6) transition of Sm2+ appeared at high temperature. (C) 1999
Elsevier Science Ltd. All rights reserved.