Z<sub>4</sub> Like Centre in NaCl Doped by Divalent Metals: Mg, Mn, Ni, Cd, or Pb

Watterich, A.

doi:10.1002/pssb.2220880156

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…On exciting the Tb-doped RbBr crystal at 262 nm emission bands at 328 nm, 370 nm, 490 nm and 531 nm and a small band at 620 nm have been observed. This is in agreement with the early research work [22,23]. The emission under 345 nm is similar to the emission under 224 nm and 262 nm excitation.…”

Section: Photoluminescencesupporting

confidence: 94%

“…After suitable optical and/or thermal treatment as many as five types of (Z 1 to Z 5 ) perturbed centers are reported to be formed [21]. Generally, these Z centers are reported to be formed when the divalent cations have a relatively low second ionization potential, like the alkaline earth and rare earth ions [20,23]. Considering the fact that the new absorption appears on F bleaching, it appears more appropriate to assign the new absorption to an electron excess center.…”

Section: Optical Absorptionmentioning

confidence: 93%

“…As observed in the other hosts [7,12,13,16] ions [22,23]. The various absorption and emissions of Tb 3+ ions are shown in tabular form in Table 1 [24].…”

Section: Photoluminescencementioning

confidence: 99%

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Thermoluminescence and other optical studies on RbBr:Tb³⁺ crystals

Manimozhi

Muralidharan

Selvasekarapandian

et al. 2007

Physica Status Solidi (b)

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Optical absorption, photoluminescence, photostimulated luminescence (PSL) and thermoluminescence (TL) studies on RbBr : Tb 3+ crystals irradiated with X-rays is reported. The optical absorption in the UV region confirms the presence of terbium in the host matrix in the trivalent state. Photoluminescence of these crystals exhibits characteristic Tb 3+ emissions due to transitions from the 5 D 3 and 5 D 4 levels to various levels of the 7 F septet. On F-bleaching X-irradiated crystals Z 3 centers are observed. The TL glow curve indicates a two-step thermal annihilation process for the radiatively created defects. The presence of the characteristic emissions due to terbium ions in the photostimulation at the F band confirms the participation of Tb ions in the defect-production process. Trap parameters for the TL process are calculated and presented. Emissions under the TL glow peaks contain the characteristic emissions of Tb 3+ in addition to the emission due to the recombination of the F electron with V-type centers.

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Section: Photoluminescencesupporting

confidence: 94%