Altshuler N.; Larionov A.; Rodionova M.; Stolov A.
(2002)
The narrow low intensity line with maximum at λ-1 = 15104 cm-1 and width δ=0.7 cm-1 at T=4.2 K have been detected in absorption spectrum of regular LiTmF4 crystal. The observed line belongs to transition from ground state ...