Luminescence of cerium compounds

Kröger, F. A.; Bakker, J.

doi:10.1016/s0031-8914(41)90384-1

Cited by 52 publications

(18 citation statements)

References 21 publications

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“…In 1989, after the discovery of the scintillation properties of CeF 3 [2,3], the spectroscopy and the origin of its luminescence were not really known [18,19]. Thanks to the intensive work of several groups from the collaboration [7,8,[20][21][22] as well as of other groups [23], the spectroscopy of CeF 3 is now well understood.…”

Section: 2 Luminescence Propertiesmentioning

confidence: 99%

Extensive studies on CeF3 crystals, a good candidate for electromagnetic calorimetry at future accelerators

Auffray

Baccaro

Beckers

et al. 1996

Nuclear Instruments and Methods in Physics Research Section A:

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In the framework of its search for new heavy, fast, and radiation-hard scintillators for calorimetry at future colliders, the Crystal Clear Collaboration performed a systematic investigation of the properties and of the scintillation and radiation damage mechanisms of CeF 3 monocrystals. Many samples of various dimensions up to 3 × 3 × 28 cm 3 were produced by industry and characterized in the laboratories by different methods such as optical transmission, light yield and decay time measurements, excitation and emission spectra, gamma and neutron irradiations. The results of these measurements are discussed. The measured light yield is compared with the theoretical expectations. Tests in high-energy electron beams on a crystal matrix were also performed. The suitability of CeF 3 for calorimetry at high-rate machines is confirmed. Production and economic considerations are discussed.

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Section: 2 Luminescence Propertiesmentioning

confidence: 99%

Extensive studies on CeF3 crystals, a good candidate for electromagnetic calorimetry at future accelerators

Auffray

Baccaro

Beckers

et al. 1996

Nuclear Instruments and Methods in Physics Research Section A:

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“…The photoluminescence of La1-xCexF3, where 0<x<1, has been studied by many investigators over the past 50 years [6,8,9,10,11,12]. The free-ion 4fl electronic ground state of Ce3+ is split by the spin-orbit interaction into two states 2p5/2 and 2p7/2 separated by 0.3 eV, and the excited 5d band is located 6.2 eV above the bottom of the 4f band [13].…”

Section: Introductionmentioning

confidence: 99%

“…When Ce3+ is introduced into LaF3, the crystal field depresses the 5d band by 1.3 e V (nephelauxetic shift) and splits it into five Stark components with an overall splitting of approximately 1.2 eV [10,11]. Ions excited into the 5d or higher lying states of Ce3+ rapidly decay to the lowest 5d level from which fluorescence is observed to the two spin-orbit states of the 4f grounc1 state [8,9,10,14]. The observed Stokes shift of the 4f-5d transition is approximately 0.6 eV [9,10,14].…”

Section: Introductionmentioning

confidence: 99%

“…For cerium concentrations of several percent or more, additional longer wavelength fluorescence bands extending to at least 450 nm are observed [8,9], and have been ascribed to cerium ions in sites perturbed by nearby defects [12]. The 284-300 nm emission is excited by wavelengths <260 nm, whereas the longer wavelength emission is excited by wavelengths in the 260-310 nm region [8,11].…”

Section: Introductionmentioning

confidence: 99%

“…The 284-300 nm emission is excited by wavelengths <260 nm, whereas the longer wavelength emission is excited by wavelengths in the 260-310 nm region [8,11].…”

Section: Introductionmentioning

confidence: 99%

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Scintillation mechanisms in cerium fluoride

Moses

Derenzo

Weber

et al. 1994

Journal of Luminescence

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Ultraviolet photoelectron spectroscopy, optical transmission, fluorescence excitation spectroscopy, and time-resolved fluorescence spectroscopy are used to investigate the scintillation mechanisms of cerium fluoride (CeF3) and of lanthanum fluoride doped with cerium in concentrations between 0.01% and 50% mole fraction cerium. In LaF3:Ce the absorption of either optical or ionizing radiation directly or indirectly results in excitation of the Ce3+ 4f electron to the lowest 5d level followed by 5d~4f fluorescence at 284-300 nm. Whereas for optical excitation the fluorescence has a 20 ns decay time, for ionizing radiation there is an additional faster (2-10 ns) initial decay component. As the cerium concentration increases, an another band appears that partially absorbs the 284-300 nm emission and re-radiates it in a broad band peaking at 340 nm and having a longer (-30 ns) decay time. In the limit of 100% CeF3, radiation trapping is very pronounced. The additional absorption and emission bands present at large Ce concentrations are attributed to Ce3+ ions in perturbed sites. The relative efficiency for excitation of unperturbed and f.erturbed cerium sites via the Ce3+ 5d and 6s bands, --the F-2p valence band, and the Ce3+ or La+ 5p core levels are determined from fluorescence excitation spectra.

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Wide Band Gap Scintillation Materials: Progress in the Technology and Material Understanding

Nikl

2000

phys. stat. sol. (a)

366

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Luminescence and scintillation characteristics of four selected material systems, namely CsI : Tl(Na), CeF 3 , PbWO 4 and Ce-doped aluminium perovskites XAlO 3 : Ce (XY, Lu, Y±Lu) are reviewed. The progress in their physical understanding and related optimisation of their characteristics and technology are demonstrated. The important role of various defect states in the scintillator performance of these materials is stressed, which has led to the need for a deeper study of the processes of energy transfer and storage to achieve their intrinsic limits and full exploitation in scintillation detectors.

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Luminescence of cerium compounds

Cited by 52 publications

References 21 publications

Extensive studies on CeF3 crystals, a good candidate for electromagnetic calorimetry at future accelerators

Extensive studies on CeF3 crystals, a good candidate for electromagnetic calorimetry at future accelerators

Scintillation mechanisms in cerium fluoride

Wide Band Gap Scintillation Materials: Progress in the Technology and Material Understanding

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