Scintillation substances (variants)

Details Scintillation substances (variants) Scintillation substances (variants)

2006-11-07

2006-11-07

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C117S013000, C117S942000

Reexamination Certificate

active

07132060

ABSTRACT:
Inventions relates to scintillation substances and they may be utilized in nuclear physics, medicine and oil industry for recording and measurements of X-ray, gamma-ray and alpha-ray, nondestructive testing of solid states structure, three-dimensional positron-emission tomography and X-ray tomography and fluorography. Substances based on silicate comprising lutetium and cerium characterized in that compositions of substances are represented by chemical formulae CexLu2+2y−xSi1−yO5+y, CexLiq+pLu2−p+2−y−x−zAzSi1−yO5+y−p, CexLiq+pLu9.33−x−p−z□0.67AzSi6O26−p, where A is at least one element selected from group consisting of Gd, Sc, Y, La, Eu, Tb, x is value between 1×10−4f.units and 0.02 f.units., y is value between 0.024 f.units and 0.09 f.units, z is value does not exceeding 0.05 f.units, q is value does not exceeding 0.2 f.units, p is value does not exceeding 0.05 f.units. Achievable technical result is the scintillating substance having high density, high light yield, low afterglow, and low percentage loss during fabrication of scintillating elements.

REFERENCES:
patent: 4647781 (1987-03-01), Takagi
patent: 4958080 (1990-09-01), Melcher
patent: 4988882 (1991-01-01), Francois et al.
patent: 5660627 (1997-08-01), Manente et al.
patent: 6278832 (2001-08-01), Zagumennyi et al.
patent: 6323489 (2001-11-01), McClellan et al.
patent: 6413311 (2002-07-01), Melcher et al.
patent: 6437336 (2002-08-01), Pauwels et al.
patent: 6464777 (2002-10-01), Kitamura et al.
patent: 6498828 (2002-12-01), Jiang et al.
patent: 6753099 (2004-06-01), Imamura et al.
patent: 2005/0173676 (2005-08-01), Kurashige et al.
K.T. Wilke “A growing of crystals” Leningrad, publisher<Nedra>, (1977), 600p., a translation from Geramn von K. Th. Wilke “Kristallzuchtungen”<VEB Deutcher Verlag der Wissenschaften, Berlin, 1973.
A.A. Vershman, K.I. Petrov, “A functional inorganic lithium compound” Moscow, Energoizdat, (1996), 208p.
P.I. Antonov, L.M. Zatulovski, A.S. Kostygov et al., “An obtaining of profiled single crystals and products by Stepanov's method”, Leningrad, “Nauka”, (1981) p. 280.
Carel W.E. van Eijk “Inorganic scintillators in medical imaging detectors”, Nuclear Instruments and Methods in Physics Research A 509 (2003) pp. 17-25.
A.G. Gomes, A.Bril “Preparation and Cathodoluminescence of Ce3+ activated yttrium silicates and some isostructural compounds”, Mat. Res. Bull. vol. 4, (1969) pp. 643-650.
W.Rossner, R.Breu “Luminescence properties cerium-doped gadolinium oxyorthosilicate cera-mics scintillators” Proc. Int. Conf. on Inorganic Scintillators and Their Application, STINT'95, Netherlands, Delft University, (1996) p. 376-379.
P.Dorenbost, C. van Eijekt, A.Bost, C.Melcher “Afterglow and thermoluminescence properties of Lu2SiO5:Ce scintillation crystals”, J.Phys.Condens.Matter 6 (1994), pp. 4167-4180.
M.E. Globus, B.V. Grinev “Inorganic scintillators”, publishing house ‘AKTA’ Kharkov, (2000) p. 51.
W.M. Moses, S.E. Derenzo “Scintillators for positron emission tomography”, Conference SCINT'95, Delft, The Netherlands (1995), LBL-37720.
A.M.Korovkin, T.I.Merkulyaeva, L.G.Morozova, I.A.Pechanskaya, M.V.Petrov, I.R.Savinova “Optical and spectral-luminescence properties of the orthosilicate crystals of lanthanide” Optics and Spectroscopy, value 58, issue 6 (1985) p. 1266-1269.
I.A. Bondar, N.V. Vinogradova, L.N. Dem'yanets et al. “Silicates, germanates, phosphates, arsenates, and vanadates. Chemistry of rare elements” monograph, Moscow, Nauka, (1983) 288 p.
The international X-ray library's database, PDF Database, International Center for Diffraction Data, Newton Square, PA, U.S.A.
R.L. Byer, J.F. Young “Growth of High-Quality LiNbO3 Crystals from the Congruent Melt” Journal of Appl. Phys. 41, N6, (1970), p. 2320-2325.
P. Lerner, C. Legras, J. Dumas “Stoechiometrie des mohocristaux de metaniobate de lithium”, Journal of Crystal Growth, 3,4 (1968) p. 231-235.
P.V. Geld, F.A. Sidorenko “Dependence of physical-chemical properties of non-stoichiometric compounds on structure of short-range order” Izvestia AN SSSR, seria Inorganic materials, v.15, #6, (1979) p. 1042-1048.
D.T.J. Hurle “Crystal Pulling from the Melt” Springer-Verlag, Berlin, Heidelberg, New-York, London, Paris, Tokyo, Hong Kong, Budapest, (1993) p. 21.
C.D. Brandle, A.J.Valentino, G.W.Berkstresser “Czochralski growth of rare-earth orthosilicates (Ln2SiO5)”, J. Crystal Growth 79 (1986), pp. 308-315.
E.G. Devitsin, V.A. Kozlov, S.Yu Potashov, A.I. Zagumennyi, Yu.D. Zavartsev “Luminescent properties of Lu3A15O12 crystal doped with Ce” Proceeding of International Conferences “Inorganic scintillators and their applications” (SCINT 95), Delft, the Netherlands, Aug. 20-Sep. 1, (1995).

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