Frequently Ask Questions

Many answers to common questions about our radiation detectors can be found here. If you can’t find the answer you’re looking for in the FAQs, feel free to submit your own question and we’ll find an answer for you if we can! You can also ask questions about each FAQ in the “Comment on this FAQ” section if you need some elaboration on the answer.

FAQs

Popular FAQs

"MARSSIM" is the "Multi-Agency Radiological Survey and Site Investigation Manual," a document widely used in designing and carrying out radiological surveys in support of license termination.

With the MARSSIM Method the confidence level is locked in at 95% and 3 is used for the "k²" value. This affects, then, only calculations for Ld, MDA, and LLD. This method was proposed by Dr. Alan Brodsky and was adopted in the MARSSIM manual. In truth, whether the MARSSIM method or the "traditional" method (proposed by Lloyd Currie) is used, very little difference is seen in the end result.

The MARSSIM/Brodsky method should be more accurate when low background count rates are present. To match the MARSSIM methodology and Brodsky recommendations exactly, the sample counting time and background counting time should be identical, although MARSSIM does state that other methods exist that adjust for these differences.

What types of radiation do your instruments detect? Our instruments detect ionizing radiation. Types of ionizing radiation are Alpha Beta, Gamma, X-ray. Examples of NON-ionizing radiation are microwaves and radio waves.

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Yes and No. You can run it, but we don't have installer built for the 64-bit OS yet. The work around is to just copy the files to your computer, rather than running the installer.

For the PC:

Click Here for the Windows Files 1) Unzip the files to a folder in the "Program Files" directory on your C: drive called "Abacus_Win" (C:Program FilesAbacus_Win) 2) Click on the "Abacus.exe" file to launch (you can also create a shortcut to the file if you like as well by copying the Abacus.exe file and pasting a shortcut where you would like to have it on your computer).

For the PocketPC:

Click Here for the Pocket PC / Windows Mobile Files 1) Unzip the cab file to your PC. 2) Copy the cab file to your pocket pc (My Documents folder is fine) 3) On your Pocket PC, click on the file you just copied to it. You might get an error the first time you try this because MS is moving from C++ to C Sharp, but if you try it a second time, it will install fine.

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The cover has to be removed in order to access the trimmer.

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The files should be saving to the "Observer USB Data" folder in the "Documents" directory on your computer.

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The dead time has to do with detector size, anode resistor valve, and the distance of the anode resistor from the detector. In general the smaller the detector the shorter the dead time. The lower the resistor value the shorter the dead time. The closer the anode resistor is to the anode the shorter the dead time. Energy compensation does not contribute to the dead time of a detector.

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