Optical-absorption and photoionization measurements from the excited states ofCe3+:Y3

Thermoluminescence investigation of donor (Ce3+, Pr3+, TbYou1, Bos2, Shi3 et al. 2012Phys. Rev. B682130View full textAdd to dashboardCite

“…This band is attributed to the second dipole and spin allowed 4f 8 → 4f 7 5d excitation in Tb 3+ that is known to be located at 228 nm. 31 The transition ends at the so-called low-spin [ 32 The 5d 1 excitation of Ce 3+ occurs at 457 nm, but it is not present as a band in the TLES. We conclude that the 5d 3 and 5d 4 levels are definitely inside the CB, and the 5d 2 level is either within or very close below the bottom of the CB.…”

Photoluminescence Kinetics of YAG Crystals Activated with Ce, and Ce and Mg

“…In the case of Y3Al5O12(YAG), where the Ce3+ ions occupy the Y3± sites of D2 symmetry the covalency effect reduces the 4f -5d separation energy to 35000 cm -1 . The splitting of the d fivefold degenerated state results in the structured absorption [1] with well-separated peaks at 450 nm, 340 nm, 270 nm and 225 nm, related to spin allowed transitions originated from the 2F512 ground state. The broad band (also parity allowed) transitions from the lowest d term to the 2F712-2F5 1 2 splitted ground electronic manifold results in the green yellow double band emission.…”

The Gd–Ce Cross-Relaxation Effects in ODMR via Ce3+ Emission in Garnet Crystals

“…concentrations, it is possible to observe the 5d ? 4f emission bands separated into two distinct peaks [21].…”