SpecMaker Example Spectra

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Example Spectra

All the spectra available have been created with SpecMaker. The spectra are available in ORTEC .chn and .an1 formats and, in some cases, a copy of SpecMaker-Assessment sheet is available, showing how GammaVision and my own program CompAct fared in analyzing the spectrum.

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QCYK

A spectrum containing all the normally measured peaks in the QCYK multinuclide reference material.

Limit of Detection

These spectra contain 50 peaks at 40 keV intervals from 50 keV upwards. Each of those peaks contains a number of counts equivalent to the Currie Detection Limit (95% confidence of detection), taking into account the continuum level and the number of channels used to measure the peak area. In each case, the background width is taken to be 5 channels.
There are three spectra, based on 100, 1000 and 10,000 counts per channel continuums.

The expectation is that spectrum analysis programs will detect and measure 95% of the peaks, i.e. at least 47 peaks. Visually, you would expect to be able to see all the peaks in the spectrum.

Each spectrum is accompanied by the csv file, which contains all the information necessary to allow you to compare your own spectrum analysis with the correct values using SpecMaker-Assessment. There are a number of example assessements for CompAct, GammaVision and Fitzpeaks.

Critical Limit

These spectra contain 50 peaks at 40 keV intervals from 50 keV upwards. Each of those peaks contains a number of counts equivalent to the Currie Critical Limit (95% confidence of identification), taking into account the continuum level and the number of channels used to measure the peak area. In each case, the background width is taken to be 5 channels.
There are three spectra, based on 100, 1000 and 10,000 counts per channel continuums.

The expectation is that 50% (i.e. 25) of these peaks will be detectable in each spectrum.

Each spectrum is accompanied by the csv file, which contains all the information necessary to allow you to compare your own spectrum analysis with the correct values using SpecMaker-Assessment. There are a number of example assessements for CompAct, GammaVision and Fitzpeaks.

Continuum

There are three spectra, based on 100, 1000 and 10,000 counts per channel continuums. Each spectrum has 50 peaks, at 40 keV intervals from 50 keV upwards, each containing 1000 counts. A fourth spectrum has 10k peaks on a 1k background continuum.

The spectra are in two ORTEC formats; .chn and .an1. Each spectrum is accompanied by the csv file, which contains all the information necessary to allow you to compare your own spectrum analysis with the correct values using SpecMaker-Assessment. GammaVision library and sdf files are provided.

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