Class Notes (834,350)
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Physics (56)
PH 122 (46)
Lecture

Radon

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Department
Physics
Course
PH 122
Professor
Brian Jones
Semester
Spring

Description
When the uranium that is reasonably ubiquitous in the earth’s crust decays, it produces a long series of further decays. There are two especially notable decay products being formed: radium (Ra), a metal, and radon (Rn), which is a noble gas. Radium, having the short half-life that it does, is very radioactive. Radioactive Decay Alpha particles – helium nuclei, two protons and two neutrons Beta particles – electrons Gamma rays The Geiger Counter Geiger-Müller tube – gas-filled tube held at very high voltage Ionizing radiation passes through tube → knocks electrons free from gas Ionized particles drawn to anode or cathode, ionizing other atoms along the way Avalanche of charges produces short but intense current, making clicking sound Background Counts Radioactive decays are random Radioactivity measured
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