Updates @ Radiation Alert

Environmental and Biological Studies on the Long-Term Effects of the Chernobyl Incident

Norman Klieman, PhD is the Director of the MS Degree Program in Radiological Sciences and Toxicology at Columbia University’s Mailman School of Public Health in New York. He and his colleagues, at Columbia and other institutions, have been conducting environmental and biological studies on the long-term health effects of the 1986 Chernobyl disaster in and around the region. Chris Thomas: Hi, this is Chris Thomas with S.E. International. How are you doing today? Norman Kleiman: Good. Hang on just one second. CT: Sure NK: I’m glad we finally connected! I really like your Ranger. CT: That’s great. Do y’all use the Ranger Wipe Test Plate for wipe sample counting? NK: No. I have a variety of different sources that we use with it and then we do a little bit of investigation. You know, hide some check sources and ask them to find them. I’m always open to new suggestions. Continue...

Radiological Quantities And Units: A “Real World” Perspective

Introduction The subject of quantities and units used in radiation protection is an important, complex, controversial, and sometimes even an emotional one. While the United Stales maintains, for the most part, use of the historical (special) units, the rest of the world has converted to SI units. While the author has his own opinion of which system is better. or at least easier to use, both are presented and discussed here with an emphasis on real world use of quantities and units rather than the theory behind them. Radioactivity Radioactivity is a quantity used primarily to measure an amount of  radioactive material. It is expressed in terms of the rate of decay of a radioactive material. The special unit of radioactivity is the curie (1 Ci ≡ 2.22 X 1012 dpm) and the SI unit is the becquerel (1 Bq ≡ 1 dps). Since both of these units are defined in Continue...

Calculating Exposure Rates from Known Quantities of Gamma-Emitting Radioisotopes

ABSTRACT This article explains the use of the “6CE” equation for estimating exposure rates from point sources of known quantities of various specific gamma ­emitting radioisotopes. A table is provided listing principle particle and photon emissions from many commonly used radioisotopes. THE “6CE” EQUATION It Is sometimes necessary to estimate the exposure rate which can be expected from a known quantity of a single gamma-emitting isotope. Such a situation might occur when ordering a significant quantity of radioactive material prior to an experiment, when purchasing a new calibration source, or in radiography work. An equation which addresses this need very nicely is R = 6CE (f) / r2 Where: R • exposure rate at distance r (in Roentgens/hour) 6 = a unit conversion constant C = activity (in Curies) E = total photon energy (in MeV) f = decimal fraction of photon yield r = distance from the point source Continue...

Radiation Alert® Ranger – Quick Start Guide

This video will get you started with the use of your Radiation Alert® Ranger. Watch this quick start video guide to run through the menu and the general settings and features of your radiation detector. With the exception of the built in efficiencies, this video is also applicable to the Monitor 200 and Monitor 1000EC models as well, as they all have the same basic, simple to use interface. Continue...

Digital Radiation Detector Comparison

The Radiation Alert@ Ranger and Ranger EXP share the same operating ranges and offer a fast response with the larger tube, as well and a greater sensitivity to alphas with the larger end window. The Monitor 200 has a smaller end window, still has the ability to detect alpha and affords a little more ruggedness. The Monitor 1000EC has a linear response and a higher ranger with its energy compensated tube. Detector Window Comparison The end windows of the detector can effect how much alpha, if any the detector is capable of detecting.  Compare radiation detectors below. Energy Response Comparison The Energy Response determines how well it responds to different radiation via the window or the side wall of the detector. Compare radiation detector respond graphs below.     Please, feel free to contact us if you need assistance finding the right detector for the situation at hand. Continue...

Monitor 1000EC Quick Start Video

This video will get you started with the use of your Radiation Alert® Monitor 1000EC. Watch this quick start video guide to run through the menu and the general settings and features of your radiation detector. With the exception of the built in efficiencies, this video is also applicable to the Monitor 200 and Ranger models as well, as they all have the same basic, simple to use interface. Continue...