Proportional Counters

To some general information about Proportional Counters, click the Info Button 

Info Button

Click on an image for a larger view and more information

First Generation Gas Flow Alpha Counter

Early 4 pi Counter

RCL 4 pi Counter 

Low Geometry Alpha Counter (LOGAC)

Chalk River 4 pi Counter

  Chalk River 2 Pi Counter

Chalk River Anticoincidence Shield

Harold Rossi's Tissue Equivalent Proportional Counter

RCL Gas Flow Counter

Bernstein-Ballentine Counter

Neutron Detectors

For some general information about boron trifluoride neutron detectors, click the Info Button to the right.

Info Button


BF3  tube for Cosmic Ray Studies

Chalk River BF3

20th Century Electronics BF3 Tube - Model 5EB40

20th Century Electronics BF3 Tube - Model 15EB70

Nancy Wood BF3  Tube - Model G2329

Nuclear-Chicago BF3  Tube - Model NC-205 

RCL BF3  Tube  -  Mark 2, Model 1

RCL Fast Neutron Counter - Mark 2, Model 201

If you have any corrections that you would like to make to the information presented here, the grammar, spelling, or anything else, please contact Paul Frame at

Museum Directory 

Last updated: 04/20/10
Copyright 1999, Oak Ridge Associated Universities