Radiation survey instruments are capable of measuring very low levels of ionizing radiation; well below levels that are hazardous. If we are interested in knowing how much radiation is present in an area, not only do we have to understand the correct instrument to use, that instrument must also be calibrated to the type and energy of radiation we are interested in measuring. Health Physics Associates is capable of calibrating your radiation measurement instruments to the following list of radiations and energies. We also possess the health physics knowledge to help you choose the correct instrument for your application so that your measurements are meaningful.
Radiation Type and Energy
Intensity
Gamma and X-Ray
Cesium 137 (662 keV)
2 μR/hr through 20 R/hr
Americium 241 (60 keV)
1 μR/hr through 500 mR/hr
Cobalt 60 (1250 keV average)
10 μR/hr through 500 R/hr
Radium 226 (800 keV)
10 μR/hr through 100 R/hr
Iodine 125 (30 keV)
10,000 through 100,000 dpm
Beta
154 through 2200 keV
10,000 through 400,000 dpm
Alpha
Americium 241
10,000 through 100,000 dpm
Radium 226
500 through 50,000 dpm
Uranium 238
10 through 100 dpm
Plutonium 239
100 through 15,000 dpm
Neutrons
Americium/Beryllium
0.1 through 2000 millirem/hr
Radon Decay Products
Working Level efficiencies
Radon Gas
4 through 100 pCi/l (150 through 3700 Bq/m3)
Should you have questions about what type of survey meter to use or desire information on instrument calibration, do not hesitate to contact us.