Archive for November, 2016

Derived Data with new dose quantities

November 15th, 2016

The Derived Data application in the Nucleonica Nuclide Datasheets++ has been updated to include the new dose quantities. The Derived Data now include:
* The list of derived data now includes covers a) air kerma rates Kair; b) exposure rates X; and c) ambient dose equivalent rates H*(10) for approximately 1500 gamma and x-ray emitting radionuclides (depending on the database used).
* The threshold energy used in the calculations for dose quantities can be set (in the Options) by the user to investigate the effect of low energy photons on the dose calculations.
* The results are for single nuclides only. In this application, no account is taken of short-lived daughters. To obtain the results including short-lived daughters the user should use the Photon Dose Rate Constants application.
* The underlying dataset used in the calculations can be selected from a list of international nuclear datafiles (JEFF3.1, ENDF/B-VII.1, 8th TORI)
ddDerived Data showing the new dose quantities.

More information…
Derived Data wiki page

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Radiological Converter

November 10th, 2016

The Radiological Converter is a further development of Nucleonica’s Mass Activitiy Converter++ with the following new features:
* The list of conversion quantities now covers a) air kerma rates Kair; b) exposure rates X; and c) ambient dose equivalent rates H*(10) for approximately 1500 gamma and x-ray emitting radionuclides (depending on the database used).
* The threshold energy used in the calculations for dose quantities can be set by the user to investigate the effect of low energy photons on the dose calculations.
* Account is taken of short-lived daughter nuclides when a parent nuclide is selected indicated with a * e.g. Cs137*.
* The underlying dataset used in the calculations can be selected from a list of international nuclear datafiles (JEFF3.1, ENDF/B-VII.1, 8th TORI)
cs137starRadiological Converter showing the new dose quantities. A key feature is the inclusion of short-lived daughters in the calculations as indicated by an asterisk * before the physical quantities and following the nuclide name e.g. Cs137*.

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Radiological Converter wiki page

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Photon Dose Rate Constants++

November 7th, 2016

The new Photon Dose Rate Constants++ application in Nucleonica allows the user to calculate the internationally accepted Ambient Dose Equivalent Rate Constants, Air Kerma Rate Constants, and Exposure Rate Constants for approximately 1500 gamma and x-ray emitting radionuclides. These quantities are useful for estimating the dose rates from point sources where attenuation and scattering in the source and in air are negligible. From the dose rate constants, the ambient dose rates H*(10), air kerma rates Kair, and exposure rates X can then be obtained.
In contrast to previously defined dose rates, the ambient dose rate H*(10) accounts for absorption and scattering in the human body by simulating the body through a phantom (the ICRU sphere of 30 cm diameter made of tissue equivalent material).drcppNew Photon Dose Rate Constants application

For the calculation of the dose rate constants, some nuclides are considered to be in equilibrium with daughter products. This is the case when a single radioactive decay chain in which radionuclides are present in their naturally occurring proportions, and in which no daughter nuclide has a half-life either longer than 10 days or longer than that of the parent nuclide, shall be considered as a single radionuclide.
Additional features of the application are that 1. the underlying dataset used in the calculations can be selected from a list of international nuclear datafiles (JEFF3.1, ENDF/B-VII.1, etc.) and viewed in the results grid; and 2. the threshold energy used in the calculations can be set by the user to investigate the effect of this on the calculation results.

More information…
Photon Dose Rate Constants++ wiki page

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