Doping of KDP single crystals with cerium: Growth and optical properties

Voronov, A. P.; Babenko, G.N.; Puzikov, V. M.; Roshal, Alexander D.; Salo, Vitaly I.

doi:10.1134/s1063774508040251

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…Недавно в Институте монокристаллов (Харьков, Украина) удалось вырастить из водных растворов сцинтилляционные кристаллы дигидрофосфата калия KH2PO4 (KDP), допированные ионами таллия Tl + или церия Ce 3+ [11][12][13][14]. Уникальность полученных кристаллов KDP:Tl и KDP:Ce состоит в том, что они занимают промежуточное положение между органическими и неорганическими сцинтилляторами.…”

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SCINTILLATION MONOCRYSTALS OF KDP:Tl AND KDP:Ce DOPED BY THALLIUM AND CERIUM FOR SELECTIVE DETECTION OF FAST NEUTRONS

2018

EEJP

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This research is going to explain the fast neutrons and gamma radiation registration by the new inorganic single crystals of the KDP (Potassium Dihydrogen Phosphat) group that was grown from the water solutions and activated by the thallium Tl + or cerium Ce 3+ . The appearance of the luminescence upon KDP:Tl crystals irradiation with the fast neutrons is explained by secondary ionizing radiation (recoil protons and oxygen recoil nuclei) with excitation of the activator under ionization losses for inhibition. Also the recombination mechanism with the radiation defects of the hydrogen sublattice going to transmit electron excitations to the region of the Tl + luminescence center. In the KDP:Ce crystals the excitation mechanism of the activator has a similar character, but the luminescence itself is due to the 5d  4f transition in Ce 3+ ions. The detection efficiency for activated KDP:Tl and KDP:Ce crystals to the fast neutrons in comparisons with organic (plastic) scintillators were calculated theoretically and experimentally. For the crystal volume about 10x10x10 mm3 with the optimal activator concentration the fast neutron detection efficiency under irradiation of 239 Pu-Be is 12% for KDP:Tl and 16% for KDP:Ce, which is in a consistent with the theoretical calculation and is not lower according to the parameters of typical organic scintillators. A high natural selectivity of the KDP scintillators to the fast neutrons due to their low sensitivity to gamma radiation was detected. Herewith the internal discrimination of n/γ signals (the ratio of detection efficiencies for the fast neutrons and gamma quants) for activated KDP crystals is 7-8 times higher than of regular plastic scintillators.

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SCINTILLATION MONOCRYSTALS OF KDP:Tl AND KDP:Ce DOPED BY THALLIUM AND CERIUM FOR SELECTIVE DETECTION OF FAST NEUTRONS

2018

EEJP

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“…The effect of Ce(IV) doping in the well known NLO crystals of KHP and ZTS has been investigated. Although it was reported that ''direct'' doping by introducing cerium salts into the initial solution cannot be implemented, 20 in the present investigations we succeeded in doping a small amount of Ce through the solution during the crystallization process in aqueous solution by the conventional slow evaporation solution technique (SEST). The exact dopant concentration induced in the crystal lattice has been confirmed and estimated quantitatively by EDS and ICP techniques.…”

Section: Introductionmentioning

confidence: 93%

“…18 The effect of cerium doping on the dielectric properties of hafnium dioxide 19 and the influence of doping KDP crystals with cerium ions and organocerium complexes have been investigated. 20 Cerium doped KDP crystals exhibit a photoluminescence band peaking at the wavelength 350 nm. crystals doped with cerium and europium ions have been reported as potential new dosimetric materials.…”

Section: Introductionmentioning

confidence: 99%

Rare earth cerium doping effects in nonlinear optical materials: potassiumhydrogen phthalate (KHP) and tris(thiourea)zinc(II) sulfate (ZTS)

et al. 2010

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The influence of Ce(IV) doping on ZTS and KHP crystals over a concentration range from 1 to 10 mol% in the solution during crystallization, which leads to a true concentration range from few ppm to few tens of ppm in the crystals has been investigated. The XRD and FT-IR analyses indicate that the crystal undergoes considerable stress as a result of doping. Incorporation of the Ce(IV) dopant into the crystal lattice was well confirmed by energy dispersive X-ray spectroscopy (EDS) and quantified by inductively coupled plasma (ICP) technique. The high-resolution X-ray diffraction (HRXRD) studies reveal that Ce doping in KHP leads to degradation of crystal quality whereas ZTS can accommodate Ce predominantly at the substitutional sites without any degradation of crystalline perfection. The second harmonic generation (SHG) efficiency is not influenced by Ce doping in the KHP crystals while in ZTS crystals, it is enhanced to a considerable extent correlated with moderately improved crystalline perfection.

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“…KDP single crystals are applied in different areas of implementation. The large ones (40 cm in height) are used as frequency doublers, and Q-switches in solid-high-beam facilities such as National Ignition Facility in the USA 1,2 , and the smaller ones are usually taking the application in fast neutron detectors systems 3,4 . For single crystal growth, it is necessary to use a raw material with low concentrations of metal impurities especially iron and chromium due to its strong influence on the crystal growth rate and crystalline perfection 5 , 6 .…”

Section: Introductionmentioning

confidence: 99%

Potassium Dihydrogen Phosphate Purification Process by Crystallisation in the Presence of Chelating Agents

2018

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This article describes the investigation of the purification process of potassium dihydrogen phosphate (KH2PO4, KDP) from iron and chromium impurities by crystallisation in the presence of different chelating agents – chelators. The best conditions of purification process such as a chelator type and its amount, reaction time were determined by experiments. The most effective chelating agents were selected. The requirements for raw material for the purification process were defined.

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Doping of KDP single crystals with cerium: Growth and optical properties

Cited by 4 publications

References 4 publications

SCINTILLATION MONOCRYSTALS OF KDP:Tl AND KDP:Ce DOPED BY THALLIUM AND CERIUM FOR SELECTIVE DETECTION OF FAST NEUTRONS

SCINTILLATION MONOCRYSTALS OF KDP:Tl AND KDP:Ce DOPED BY THALLIUM AND CERIUM FOR SELECTIVE DETECTION OF FAST NEUTRONS

Rare earth cerium doping effects in nonlinear optical materials: potassiumhydrogen phthalate (KHP) and tris(thiourea)zinc(II) sulfate (ZTS)

Potassium Dihydrogen Phosphate Purification Process by Crystallisation in the Presence of Chelating Agents

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