Radioactive- Plan And Design Lab.docx

Title: Radioactive – Planning and Design lab Observation: In order for the Geiger Muller tube to function, a potential difference VAB has to be applied between A and B. The count rate registered by an instrument connected to the tube depends on several factors such as the distance from the radioactive source to the thin mica window, the activity of the source and VAB. The tube can detect alpha, beta and gamma radiation. Hypothesis: As the voltage increases the count rate increases. Aim: To design a laboratory experiment to investigate how the count rate due to gamma radiation only depends upon the potential difference VAB. Apparatus and materials: Geiger Muller tube, Voltmeter, Ratemeter, Variable DC power supply, Aluminium, connecting wires, radioactive source –cobalt -60, stop-watch