Lead carbonate, a new fast, heavy scintillator
William W. Moses,S.E. Derenzo +1 more
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In this article, the authors describe the scintillation properties of lead carbonate (PbCO/sub 3/), a newly discovered, heavy (6.6 g/cm/sup 3/) inorganic scintillator.Abstract:
The authors describe the scintillation properties of lead carbonate (PbCO/sub 3/), a newly discovered, heavy (6.6 g/cm/sup 3/), inorganic scintillator. Its fluorescence decay lifetime, measured with the delayed coincidence method, is described by a sum of three exponentials. The emission spectrum peak is centered at a wavelength of 475 nm and drops to less than 10% of its peak value at 370 nm and 580 nm. The authors were unable to obtain an optical quality crystal of pure PbCO/sub 3/, but when a 3 mm cube of a cerussite (a naturally occurring mineral form of PbCO/sub 3/) is excited with 511 keV photons, a photopeak with a 42% full width at half maximum is observed at approximately 9% the light output of a bismuth germanate (BGO) crystal with similar geometry. The light output increases rapidly with decreasing temperature, plateauing at twice the light output of BGO at approximately -40 degrees C. The short fluorescence lifetime, high density, and reasonable light output of this new scintillator suggest that it would be useful for applications where high counting rates, good stopping power, and nanosecond timing are important, such as medical imaging and nuclear science. >read more
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References
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Measurement of the Time Dependence of Scintillation Intensity by a Delayed‐Coincidence Method
L. M. Bollinger,G. E. Thomas +1 more
TL;DR: In this paper, a new method for the measurement of the time dependence of the light intensity from scintillators is described, which can be applied to all modes of excitation.
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A measurement of the light yield of common inorganic scintillators
I. Holl,E. Lorenz,G. Mageras +2 more
TL;DR: In this article, the light yield in photons per magaelectronvolt of some common inorganic scintillating crystals has been measured with silicon photodiodes, and the light signal was calibrated against 60-keV gammas converted directly in the photodiode depletion layer.
Journal ArticleDOI
Light pulse shapes from plastic scintillators
M. Moszyǹski,B. Bengtson +1 more
TL;DR: In this paper, a detailed study of the light pulse shape from the binary NE 111 and the ternary Pilot U, Naton 136, KL 236, NE 102A, NE 104 and NE 110 plastic scintillators was performed by the single photon method using XP 1021 and C 31024 photomultipliers.
Journal ArticleDOI
Prospects for new inorganic scintillators
TL;DR: In this paper, it is shown that it is possible to use synchrotron X-radiation to measure fast fluorescent emission in compounds not readily available in single-crystal form.
Journal ArticleDOI
Growth of crystalline calcite from a CaCO3-CaO melt
TL;DR: In this article, the Bridgman method was used for the growth of calcite from a melt of composition X CaCO 3 = 0.9, X CaO = 1.1 at 1280°C under a pressure of carbon dioxide of 56 atm. To obtain large crystals, a lowering speed of 2.5 mm/h was required.