Buildup and Attenuation

January 25th, 2017
by Joseph Magill

The Dosimetry & Shielding H*(10) has been further extended to include a new tab giving detailed information on the mass coefficients and buildup factors for a range of materials. The data is available in both graphical and tabular form.BUF_concrete MC_concrete
The list of shield entries, which has been extended to include 14 new materials, now consists of: Air, Aluminium, Argon, Beryllium, Boron, Calcium, Carbon, Concrete, Copper, Gadolinium, Iron, Lanthanum, Lead, Magnesium, Molybdenum, Nitrogen, Oxygen, Phosphorus, Potassium, Silicon, Sodium, sulfur, Tin, Tungsten, Uranium, Water.

More information…
Dosimetry & Shielding H*(10) wiki page
Details on Attenuation and Buildup

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Nucleonica Newsletter 2017

January 3rd, 2017
by Joseph Magill

Dear Nucleonica Users,
In 2016, we continued with our mission to build the most innovative technical resource for knowledge creation & competence preservation for the worldwide nuclear science community. Our vision is to provide scientists, engineers and technical personnel in the field the best software solutions and, in addition, create a sustainable home for the nuclear science community on the web.
Nucleonica Online Applications:
During the past year, we have again extensively upgraded and re-written a wide range of applications. In particular the following new applications have been created: Photon Dose Rate Constants, Radiological Converter, and Dosimetry & Shielding, H*(10). Pages 2-4 describe these new developments in more detail.
nn_2017Nucleonica Dedicated Training Courses:
In the area of training, 2016 has been a busy year for the Nucleonica team. In May there was a 2-day training course in CERN. This was followed by 3 training courses at the WAK / KIT in Karlsruhe and a course at JEN mbH on the Fz-Juelich site. In November, a training course was held at the BfS premises in Berlin with emphasis on nuclear security and nuclear material identification. For more information see pages 11-13.
If you would like to book a dedicated training course for your organisation 2017, please make sure to register your interest as soon as possible. To enquire about Nucleonica training courses, please send an email to info@nucleonica.com.
Karlsruhe Nuclide Chart:
We continue to provide updates to the Karlsruhe Nuclide Chart through a collaboration with the EC’s DG Joint Research Centre. The new element names recently accepted by IUPAC have been included in the Karlsruhe Nuclide Chart Online. To order copies of the most recent version of the Chart, please place your order here. More information can be found on page 10.
We Welcome your Feedback:
Finally, thanks to all our partners and users for the many suggestions and proposals which we received during 2016. Many of these have been discussed in our Forum and where possible the relevant application has been updated. A particular example here was the request to update the Dosimetry & Shielding and related applications to include the internationally standarised ambient dose equivalent H*(10).

On the following pages, this Newsletter informs you in more detail about the above developments. Hopefully you find this of interest.
Finally, thanks for your continued support and best wishes for 2017.
Sincerely yours,
Joseph Magill
Managing Director

More information…
Nucleonica Newsletter 2017
Previous Newsletters
Nucleonica Newsletter 2016
Nucleonica Newsletter 2015
Nucleonica Newsletter 2014
Nucleonica Newsletter 2013
Nucleonica Newsletter 2012

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Dosimetry & Shielding H*(10)

December 19th, 2016
by Joseph Magill

The new Dosimetry & Shielding H*(10) is a further development of Nucleonica’s Dosimetry & Shielding++ with the following new features:
* The list of calculated 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)
dsh10_1The new Dosimetry & Shielding H*(10) application with 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*.

More information…
Dosimetry & Shielding H*(10) wiki page

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Apache Subversion SVN for Nucleonica Source Control Management

December 14th, 2016
by Joseph Magill

Due to the ever increasing scale and range of the applications, Nucleonica software developers are now using Subversion SVN to maintain current and historical versions of files such as source code, web pages, and documentation. Apache Subversion (often abbreviated SVN, after its command name svn) is a software versioning and revision control system distributed as free software under the Apache License (Wikipedia).
The SVN server (VisualSVN standard version) has now been installed and is running on a Nucleonica server. This can be addressed with any SVN clients such as the Tortoise SVN client. (https://tortoisesvn.net/index.en.html)
With the Tortoise client installed locally on the development computers, the Nucleonica programmers can address the repository with the appropriate URL to have the latest source code and keep the repository updated.
svgMore information
Apache Subversion (wikipedia)

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Derived Data with new dose quantities

November 15th, 2016
by Joseph Magill

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
by Joseph Magill

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*.

More information…
Radiological Converter wiki page

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Photon Dose Rate Constants++

November 7th, 2016
by Joseph Magill

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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Mass Activity Converter++

July 28th, 2016
by Joseph Magill

Nucleonica’s Mass Activity Converter has undergone a major revision. The new Mass Activity Converter++ has the following new and improved features:
– The nuclide icon box at the top left of the page is based on a client side javascript function which creates the nuclide icon using SVG (scalable vector graphics). The information contained in the nuclide box is loaded for all nuclides together with the application. Previously the nuclide image was created on the server and sent to the client when the application was loaded or a new nuclide selected.
MACpp_Am241 – The nuclide selector box is now a single drop-down menu. On entering the first letter of the nuclide of interest a list of all nuclides with this first letter is shown. Thereafter, the desired nuclide can be selected or a second letter can be inserted to further refine the search, etc. This is a more efficient procedure for nuclide navigation. The previous approach was based on two drop-down menus – one for the element and one for the isotope.
– The nuclide mixtures are now listed in the nuclide selector drop-down menu by clicking on the “mixtures” hyperlink. Clicking again on the “nuclides” hypelink will restore the list of nuclides
– Clicking on the small icon adjacent to the nuclide box icon (top left of page) will activate a pop-up menu showing the position of the nuclide and its daughters in the nuclide chart (Nuclide Explorer++). This is of interest to see and highlight the nuclide and any daughters in the chart.
– Internally the code has been significantly streamlined and simplified. When the application is loaded all relevant nuclide data are available in the client browser. When calculationds for a different nuclide are required, no further calls to the server are required.

More info…
Previous related post
MAC++ wiki page

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Names proposed for chemical elements 113 (Nh), 115 (Mc), 117 (Ts), 118 (Og)

June 9th, 2016
by Joseph Magill

They are nihonium (with the symbol Nh), moscovium (Mc), tennessine (Ts), and oganesson (Og). Until now, the quartet have been referred to simply by the number of protons in each atom – 113, 115, 117 and 118, respectively. The new names and symbols have been updated in the Karlsruhe Nuclide Chart.
Newelements2Excerpt from the Karlsruhe Nuclide Chart, showing the location of the recently named nuclides (Elements 113, 115, 117, and 118).
Nihonium references the Japanese name for Japan. The atom was discovered at the RIKEN Nishina Center for Accelerator Science.
Moscovium was named after the Moscow region, the location of the Joint Institute for Nuclear Research in Dubna.
Tennessine recognises the US state of Tennessee and the local contributions made to the discovery by the Oak Ridge National Laboratory and Vanderbilt University.
Oganesson honours the nuclear physicist Yuri Oganessian, who has played a leading role in the search for new elements including the one that will now bear his name.

Further information
IUPAC Press Release
Article in Nature
IUPAC is Naming the four new Elements Nihonium, Moscovium, Tennessine, and Oganesson
Discovery and Assignment of Elements with Atomic Numbers 113, 115, 117 and 118
Karlsruhe Nuclide Chart

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Decay Engine for Large Nuclide Sets, DELNuS++

March 16th, 2016
by Joseph Magill

Nucleonica’s Decay Engine for Large Nuclide Sets, DELNuS++, has been further updated. The application is particularly suitable for performing decay calculations with large numbers of nuclides (nuclide sets). It is also useful for investigating the radioactive decay of nuclides which undergo spontaneous fission (sf). The new application – DELNuS++ – has the following new and updated features:
– Nuclide inventories can now be created and edited directly within the application. This allows users to easily create inventories containing one or more nuclides for test purposes.
– In the inventory creation process, single nuclides as well as previously created nuclide mixtures can be added to the new inventory.
– The allowed file formats has now been considerably extended to make the upload procedure more user friendly.
DELNuS_2 – Allowed file formats: The decimal separator may be the comma or the point. If the comma is used as field separator, numerical values with a decimal comma must be quoted with double quote characters e.g. “3,14”
– the new version of DELNuS++ has been tested on Firefox, Chrome and Edge browsers.

More info…
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DELNuS++ wiki page

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