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Atomic and nuclear physics - Frederiksen

Atomic and nuclear physics - Frederiksen

128Atomic and nuclear physicsCoincidence boxThis box checks if the input pulses on the two or three selectedinputs occur simultaneously. If so, a pulse is generated at theoutput.One application is detection of cosmic ray muons (see descriptionof 5142.00 below)The coincidence box, a Na-22 source and two GM tubes, canalso be used to demonstrate the basic principles of a PETscanner.Accommodates GM tubes with BNC plugs or GM sensors with6.3 mm jack connectors.5138.00 Coincidence box 5138.00Muon ObservatoryEvery second every square meter on earth is hit by thousands of muons – elementary particles – with an averageenergy of about 4 GeV. The muons may be detected directly or via the shower of secondary particles theyproduce in collisions with ordinary matter.The muon observatory can operate in both of these detection modes. In telescope mode you only observe muonsfrom the direction defined by the detectors. In shower mode you look for simultaneous signals from three detectors,placed in a triangle - eliminating the possibility of any single particle triggering all three detectors.This muon observatory provides the hardware for both modes of operation. 25 steel absorbers, each3 x 150 x 150 mm, are included. (Coincidence box and GM tubes are not included)5142.00 Muon Observatory5142.00®science

Atomic and nuclear physics129Geiger-Müller tubesGM tube with BNC connectorThis is our standard Geiger-Müller tube for detection of alpha,beta and gamma radiation. The tube is mounted in a plastichousing and supplied with a 10 mm diameter support rod.The protective cap included should be removed when workingwith alpha or beta radiation while gamma radiation easily penetratesthe cap.GM tubes with BNC connector are compatible with GMcounter 5136.00 (and older models like 5135.30 and 5135.35).5125.15 GM tube, BNC5125.15GM sensor with jack connectorThis Geiger-Müller sensor can be used for detection of alpha,beta and gamma radiation.The sensor has a built-in high voltage supply, requiring only5 V DC through the 6.3 mm jack connector.The GM tube is mounted in a plastic housing and supplied witha 10 mm diameter support rod. The protective cap includedshould be removed when working with alpha or beta radiationwhile gamma radiation easily penetrates the cap.The Geiger-Müller tube in this detector is the same as the tubein 5125.15.GM sensors with jack connector are compatible with GMcounter 5136.00, universal counter 2002.50 and various datalogging equipment.5135.70 GM Sensor with 1/4” jackLarge area GM tube with BNC connectorThis extra sensitive GM tube has a large window with a diameterof nearly 3 cm, making it suitable for experiments withradioactive minerals, radon daughters and other low activitysources. Alpha, beta and gamma radiation can be detected.The housing is supplied with a protective cap as well as a protectivegrid in front of the window. The cap should be removedwhen working with alpha or beta radiation while gamma radiationeasily penetrates the cap.A mount with a Ø 10 mm steel rod is included.GM tubes with BNC connector are compatible with GMcounter 5136.00 (and older models like 5135.30 and 5135.35).5125.25 GM tube with BNC connector, large areaLarge area GM sensor withjack connectorThis extra sensitive GM sensor has a large window with a diameterof nearly 3 cm, making it suitable for experiments withradioactive minerals, radon daughters and other low activitysources. Alpha, beta and gamma radiation can be detected.The sensor has a built-in high voltage supply, requiring only5 V DC through the 6.3 mm jack connector.The housing is supplied with a protective cap as well as a protectivegrid in front of the window. The cap should be removedwhen working with alpha or beta radiation while gammaradiation easily penetrates the cap. A mount with a Ø 10 mmsteel rod is included. The Geiger-Müller tube in this detector isidentical to the tube in 5125.25.GM sensors with jack connector are compatible with GMcounter 5136.00, universal counter 2002.50 and various datalogging equipment.5135.65 GM Sensor with 1/4” jack, large areaTechnical datafor GM tubes Standard Large areaRecommended bias500 VGasNe + HalogenCathode446 stainless steelTemperature range (°C) - 40 to +75Effective length (mm) 38.1 36.8Effective diameter (mm) 9.1 28.6Window thickness (mg/cm2) 1.5 - 2.0 2.0 - 3.0StandardLarge areaBNCJackscience®

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