Investigation of the Light Yield Distribution in LYSO Crystals by the Optical Spectroscopy Method for the Electromagnetic Calorimeters of the COMET Experiment

The distribution of the light yield and luminescence intensity along LYSO:Ce crystal length is investigated. These distributions, determined by different defects and emission centers of the dopant in the crystalline structure and its distribution along the length, is measured by two methods: the gamma spectroscopy using radiation sources and the optical spectroscopy using ultraviolet sources. It is shown that crystals have considerable variation of the light yield and luminescence intensity both over the length of an individual crystal (in the growing direction) and for different crystals. It is established that the correction factors for the segmented calorimeter of the COMET experiment can be obtained using optical spectroscopy methods. Consideration of the correction factors will significantly reduce an error of energy measurement in a segmented calorimeter during data handling.

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Status of Cerium Fluoride Performances

MRS Proceedings ◽

10.1557/proc-348-111 ◽

1994 ◽

Vol 348 ◽

Cited By ~ 3

Author(s):

E. Auffray ◽

I. Dafinei ◽

P. Lecoq ◽

M. Schneegans

Keyword(s):

Decay Time ◽

High Energy Physics ◽

Light Yield ◽

High Energy ◽

Radiation Hardness ◽

Cerium Fluoride ◽

The World ◽

Electromagnetic Calorimeters ◽

Physics Experiments ◽

Energy Physics

ABSTRACTCerium fluoride offers a reasonable compromise between parameters like the density, the light yield, the scintillation characteristics (particularly the decay time) and the radiation hardness, and is considered today as the best candidate for large electromagnetic calorimeters in future High Energy Physics experiments. Details on the performances of large crystals produced by different manufacturers all over the world and measured by the Crystal Clear collaboration will be shown and the usefulness of a good collaboration between the industry and the users will be highlighted by some examples on the light yield and radiation hardness improvement.

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Comparison of simulated and experimental values of self-absorption correction factors for a fast and credible adjust in efficiency curve of gamma spectroscopy

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2018.05.005 ◽

2018 ◽

Vol 141 ◽

pp. 241-245 ◽

Cited By ~ 2

Author(s):

J.M. Lopes ◽

M.P.C. Medeiros ◽

R.W.D. Garcêz ◽

R.A. Filgueiras ◽

J.L. Thalhofer ◽

...

Keyword(s):

Gamma Spectroscopy ◽

Correction Factors ◽

Efficiency Curve ◽

Absorption Correction ◽

Experimental Values

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An efficient route for design of luminescent composite materials based on polyethylene containing europium dibenzoylmethanate

New Journal of Chemistry ◽

10.1039/c7nj03055j ◽

2017 ◽

Vol 41 (22) ◽

pp. 13663-13672 ◽

Cited By ~ 4

Author(s):

Dmitrii M. Roitershtein ◽

Lada N. Puntus ◽

Konstantin A. Lyssenko ◽

Ilya V. Taidakov ◽

Evgenia A. Varaksina ◽

...

Keyword(s):

Composite Material ◽

Composite Materials ◽

Optical Spectroscopy ◽

Luminescence Intensity ◽

Intensity Mapping ◽

Efficient Route

A Eu-doped luminescent composite material based on polyethylene has been developed and studied by optical spectroscopy, luminescence intensity mapping, and SEM.

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Modeling and Experimental Study of Inorganic Crystal Response Function for Gamma Spectroscopy and Dosimetry

Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles ◽

10.1115/icone20-power2012-55237 ◽

2012 ◽

Author(s):

Muhammad Ali ◽

Nafisah Khan ◽

Ahmed Hosny ◽

Rachid Machrafi

Keyword(s):

Response Function ◽

Gamma Spectroscopy ◽

Simulated Data ◽

Monte Carlo Code ◽

Inorganic Crystal ◽

Radiation Sources ◽

Institute Of Technology ◽

Channel Analyzer ◽

The University ◽

Good Agreement

A gamma spectrometer based on LaBr3(Ce) crystal has been developed. The spectrometer uses a compact data acquisition system including a multi-channel analyzer and corresponding electronics components. The response function of the detector has been simulated using Monte Carlo Code (MCNPX 2.7E). It has been also tested, at the University of Ontario Institute of Technology radiation facilities, using a series of gamma radiation sources. The simulated data has been compared with experiments and a good agreement has been achieved. This paper presents the parameters of the developed spectrometer and the results of its testing along with a comparison with NaI(TI) crystal.

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