scholarly journals An Improved Movable 3 photomultiplier (3PM)-γ Coincidence Counter Using Logical Sum of Double Coincidences in β-Channel for Activity Standardization

2020 ◽  
Vol 45 (2) ◽  
pp. 76-80
Author(s):  
Han Yull Hwang ◽  
Jong Man Lee
Keyword(s):  
Activity Standardization ◽  
Coincidence Counter

scholarly journals Coincidence counter measurements of cosmic rays in an aeroplane

1936 ◽  
Vol 156 (889) ◽  
pp. 570-577 ◽  
Keyword(s):  
Cosmic Rays ◽  
High Altitude ◽  
Cosmic Ray ◽  
Independent Sets ◽  
Vertical Line ◽  
Coincidence Counting ◽  
Detailed Design ◽  
Recording Apparatus ◽  
Coincidence Counter ◽  
Balloon Experiments

Cosmic ray measurements on mountains are limited in general to altitudes below about 4000 meters. Above this height Regener has made successful use of small balloons carrying self-recording apparatus, and occasional flights have been made with manned balloons by Piccard, Cosyns, and by American workers. Balloon experiments are, however, hardly practicable in this country, so we decided to investigate cosmic rays, and in particular the production of showers, using an aeroplane. Facilities for flying to a height of about 10 km. Were generously provided by the Air Ministry. Apparatus Two independent sets of three tube counters were used in conjunction with the usual coincidence counting circuits. The counters could be arranged in a vertical line to record vertical penetrating particles, or in a triangle to record showers. The triple coincidences were recorded by telephone counters which were photographed at intervals together with a clock and aneroid barometer. The detailed design of the apparatus required some consideration since the aeroplane available (the Vickers Vespa machine used for high altitude experiments at the Royal Aircraft Establishment) had an open observer’s cockpit in which the counting set had to be installed.

Coincidence Counter Studies of Cosmic-Ray Showers

1936 ◽  
Vol 49 (10) ◽  
pp. 711-718 ◽  
Author(s):  
R. H. Woodward
Keyword(s):  
Cosmic Ray ◽  
Coincidence Counter

scholarly journals Primary activity standardization of 177Lu for calibrating commercial dose calibrator

2020 ◽  
Vol 1505 ◽  
pp. 012023
Author(s):  
Agung Agusbudiman ◽  
Nur Rahmah Hidayati ◽  
Martalena Ramli ◽  
Holnisar
Keyword(s):  
Dose Calibrator ◽  
Primary Activity ◽  
Activity Standardization

WDC: Advanced System for Characterization of Alpha-Bearing Waste Contained in 200L and 400L Drums: Performances and Lessons Learned From the First Industrial Measurement Campaigns

2007 ◽  
Author(s):  
A. Libens ◽  
M. Vandorpe ◽  
J. M. Cuchet
Keyword(s):  
Limit Of Detection ◽  
Counting Efficiency ◽  
Lessons Learned ◽  
Nuclear Facilities ◽  
Nuclear Operators ◽  
System A ◽  
The Future ◽  
Coincidence Counter ◽  
Short Time

The Waste Drum Characterization installation was originally developed for the assay of alpha-bearing waste in standard 200 l (55 gallons) drums during the dismantling operations of the Siemens mixed-oxide (MOX) facility in Hanau (Germany). That installation was validated and qualified by the German authorities, its main performances being: - Counting efficiency for coincident neutrons: app. 1%; - Lowest Limit of Detection (LLD): 75 mg 240Pueq; - Pu content per drum: up to 100 g tot. (35 g 240Pueq); - Measurement duration: app. 20 minutes. The success of this system, a passive neutron coincidence counter combined with a high resolution gamma spectrometer, led to the radiological characterization and qualification of about 1,700 drums during the period 2001 – 2004. In 2005, after completion of the dismantling operations of the Siemens MOX facility, Tecnubel took over the WDC installation which could be used in the frame of the future dismantling of the Belgonucleaire’s MOX plant in Dessel (Belgium), which can be comparable to the Siemen’s one. This second (and new) life for the WDC means that it must be rigorously retested and validated against the Belgian authorities requirements. Furthermore, and additionally to the future use in the Belgonucleaire’s facility, Tecnubel was faced with new challenges, namely: - Assay of 400 l drums together with the 200 l packages; - Determination of the real LLD taking into account the background in different Belgian nuclear facilities, the determination of a value of ∼5 mg 240Pueq being an objective; - Assay of mixed alpha/beta-gamma wastes; - Transportability of the WDC from one plant to another; - Assistance to different nuclear operators for the licensing of the WDC for their own waste types. This paper describes the installation itself and its performances, presents the difficulties encountered during the new challenge and the results of the performed revalidation tests; it gives the perspectives and objectives on short time as well.

Activity standardization and nuclear decay data of 109Cd

2006 ◽  
Vol 64 (9) ◽  
pp. 1031-1035 ◽  
Author(s):  
K. Kossert ◽  
H. Janßen ◽  
R. Klein ◽  
M.K.H. Schneider ◽  
H. Schrader
Keyword(s):  
Nuclear Decay ◽  
Decay Data ◽  
Activity Standardization
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