Effect of concentration on afterglow suppression in CsI:Tl, Eu

Kappers, L.A.; Bartram, R.H.; Hamilton, Douglas S.; Brecher, C.; Łempicki, A.; Gaysinskiy, V.; Ovechkina, E.E.; Nagarkar, Vivek V.

doi:10.1016/j.radmeas.2007.01.048

Cited by 17 publications

(13 citation statements)

References 2 publications

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“…This case is similar to that of CsI:Tl. In the PL spectra of CsI:Tl, (36) there are four peaks; the two weak ones In the XRL spectra of CsI:Tl, (5) an intense broad peak at 550 nm was observed and attributed to the thermal ionization of trapped electrons (Tl 0 ) followed by their radiative recombination with trapped holes. Thus, as for Cs 2 CdCl 4 , a similar mechanism may result in the difference between the PL spectra and the XRL spectra.…”

Section: Scintillation Propertiesmentioning

confidence: 99%

“…Its manufacture requires controlled humidity and special handling. CsI:Tl is free from the high hygroscopy exhibited by NaI:Tl; it exhibits a long afterglow attributed to the thermal ionization of trapped electrons (Tl 0 ) followed by radiative recombination with trapped holes [V kA (Tl + )] (5) and possesses large decay time constants (τ 1 = 600 ns and τ 2 = 3.4 μs) under gamma ray excitation, (6) ) are surrounded by a tetragonal-type octahedron, slightly compressed [(Cd-Cl (1) = 2.64 Å and CdCl (2) = 2.51 Å)] along the fourfold axis, which coincides with the crystallographic c-axis. (12) This condition gives rise to a ligand field of D 4h symmetry on the divalent site.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of Scintillation and Thermally Stimulated Luminescence Properties of Cs2CdCl4 Single Crystals

Sakai¹,

Koshimizu

Fujimoto

et al. 2018

Sensors and Materials

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The optical and scintillation properties of undoped, Sb-doped, and Tl-doped Cs 2 CdCl 4 single crystals were investigated. We chose Sb 3+ and Tl + as the dopants of (ns) 2 -type electronic configurations. In the photoluminescence and scintillation spectra of undoped Cs 2 CdCl 4 , three emission peaks were observed. The scintillation decay-time constants were small (1.2 and 13 ns) and light yields were low (several tens of photons/MeV).

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Section: Scintillation Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Evaluation of Scintillation and Thermally Stimulated Luminescence Properties of Cs2CdCl4 Single Crystals

Sakai¹,

Koshimizu

Fujimoto

et al. 2018

Sensors and Materials

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show abstract

“…A clear drawback of the phosphor is its significant afterglow [1][2][3][4][5][6][7][8]. The previous analyses of the afterglow were restricted to samples containing 5% of Eu 3+ , showing the highest radioluminescence efficiency.…”

Section: Introductionmentioning

confidence: 99%

Anomalous activity of Eu3+ in S6 site of Lu2O3 in persistent luminescence

Zych

Trojan‐Piegza

2007

Journal of Luminescence

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“…Therefore, considerable attention of the investigators is paid to the removal of the said admixtures from iodide melts. A solution of this problem is demonstrated in [3]: the addition of EuI 2 to the CsI:Tl melt essentially decreases the afterglow of the said scintillator (this parameter is decreased by an order of magnitude).…”

Section: Introductionmentioning

confidence: 99%

“…Although this effect is not explained in [3], one can suppose that it consists in action of Eu 2+ or Eu 3+ on oxoanions in molten CsI. The ion Eu 3+ can be formed due to partial oxidation of Eu 2+ under the crystal growth conditions (under a pressure close to 20 KPa in the growth chamber).…”

Section: Introductionmentioning

confidence: 99%