
The setup; Pasco Geiger-Müller tube, Science Workshop 500 Interface,
USB-to-serial cable, smoke detector, rods & clamps |

A short (20 cm) rod threads into the G/M tube;
attach to long rod with right-angle clamp |

The G/M tube plugs into Channel 1 of the Science Workshop Interface.
The USB-serial cable plugs in the back of the interface |

Sort metal pieces into piles, place on
front bench
|
The
following demo is set up on the instructor's bench: |

The demo setup
|

The scope trace
|

The Geiger counter in action |

Connections on back of counter:
Middle wire to Geiger Tube
Bottom wire to Oscilloscope
Gray wire to Timer
Brown wire to 120V AC |

See-thru oscilloscope |

Connection from counter |

Geiger tube with Radium source
(in small oval containers: Watson has them!) |

Geiger tube in stand over source |

High voltage gets set to 1000 volts |

Turn timer on, or counter won't work! |