G - Physics – 01 – T
Patent
G - Physics
01
T
358/19
G01T 1/10 (2006.01) G01J 1/24 (2006.01) G01T 1/204 (2006.01)
Patent
CA 1098222
A B S T R A C T Device for light flux attenuation, particularly for additional quenching of scintillations in radionuclides activity determination. The invention may be applied for activity determination of radionuclides in liquid scintillation detectors, especially of pure beta emitters of low maximum energy like 3H, 63Ni, 14C and 35S and different optical instruments using optical diaphragms. According to the invention, body forming a count- ing chamber contains counting vial coupled with photomultipliers and is pro- vided with rotative bush revolving on bearings. Between counting vial and photomultipliers a cylindrical spring is fitted surrounding the counting vial and the rotative bush. The cylindrical spring is fastened to body at the top and at the bottom. The rotative bush is provided at the bottom with ring with hole through which cylindrical spring passes. The ring divides the spring into two parts: the lower part surrounding the counting vial and the upper one surrounding the rotative bush.
313062
Fetherstonhaugh & Co.
Instytut Badan Jadrowych
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