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…
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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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Decay Tree features & improvements

February 26th, 2016
by Joseph Magill

The Decay Tree feature in Nucleonica’s Decay Engine++ allows users to see and investigate all possible linear decay chains resulting from the decay of a radioactive nuclide or nuclide mixture. This feature is very useful when the decay process is relatively complex. It is particularly useful when fission products, resulting from spontaneous fission, are involved in the decay.
DE_DT_Cf254The Decay Tree information contains the following new features:
– The example above shows the results for the decay of Cf-254. The summary information shows the number of nodes (800), number of nuclides (329) and the number of linear chains (212) considered in the decay calculation
– A particular daughter of interest (e.g. Cs-137 resulting from spontaneous fission) can be selected from the “Highlight a nuclide” drop-down menu. Of course any other daughter product can be selected from this menu.
– Additional information can be shown by clicking the radio buttons “Show expanded nodes”, “Show all”.

More information…
Decay Engine++ wiki page

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Natural Radioactivity

February 9th, 2016
by Joseph Magill

Nucleonica’s Natural Radioactivity Applet has been rewritten as a standard Nucleonica application to replace the Java applet version. The application is an educational tool to provide information on the radioactivity of everyday materials.
NR3The new application, Natural Radioactivity, has the following new and updated features:
– The application is no longer a Java applet and it is therefore not necessary to install the Java runtime environment.
– the application runs directly is most modern browsers, in particular Chrome, Firefox, Internet Explorer, Safari etc.
– The application consists of a number of images of everyday materials, locations, etc. On placing the mouse over the image, information on the radioactivity and dose rate are given qualitatively in a central panel. Additionally, an acoustic signal is given corresponding to the level of the radioactivity (low, medium, high).
– Clicking on an image will lead to further information shown in a pop-up window.
– The wiki page gives further information together with relevant references to the information shown.

more information…
Natural Radioactivity wiki page

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Nucleonica Live

January 29th, 2016
by Joseph Magill

Nucleonica Live monitors and displays activity worldwide on the Nucleonica servers. When an application is launched by a user on the Nucleonica servers, the data are logged and superimposed on a world map. In addition to showing the name of the application, the nuclide selected and the country from which the application is launched are shown. Currently over 30 applications and over 300 nuclides are available in over 100 countries.
NucleonicaLive2More information…
Nucleonica Live wiki page

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Nucleonica Newsletter 2016

January 7th, 2016
by Joseph Magill

Nucleonica turns 5!
Dear Nucleonica Users,
5 years ago, we set out on a mission to build the most innovative technical resource for knowledge creation and competence preservation for the worldwide nuclear science community. Our vision was to not only to provide scientists, engineers and technical personnel in the field with the best software solutions available, but also to create a sustainable home for the nuclear science community on the web.
Here are some highlights from the past 5 years:
– We have established the leading nuclear science portal with thousands of users worldwide from universities, government research organizations and private companies and thereby created a truly global community.
– We developed over 40 state of the art nuclear science software solutions, which have delivered almost 4 million calculations over the past five years.
– Since we started back in 2011, all Nucleonica applications have undergone major upgrades with a view to improving user-friendliness and calculation response times.
– In 2015, we have also released the new 9th print Edition of the Karlsruhe Nuclide Chart, containing 147 new nuclides and 1497 nuclide updates compared to the 2012 edition.
Newsletter2016Still working hard to make Nucleonica even better, in 2016 we plan to introduce new web applications. Since we are constantly looking to extend the scope of Nucleonica, new application proposals from our users are very welcome. So, if you have an idea for an innovative nuclear science software application, please do not hesitate to contact us at
We would also like to encourage our users who are currently not making full use of our range of applications to upgrade to Premium in order to obtain the full potential of Nucleonica.
On the following pages, this Newsletter informs you in more detail about our recent Nucleonica developments, the new 9th print Edition (2015) of the Karlsruhe Nuclide Chart, and the 2015 Nucleonica Training Courses. Hopefully you find this of interest.
Finally, thanks to all our partners and customers for their continued support and best wishes for 2016.
Sincerely yours,
Joseph Magill
Managing Director

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

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Neutron Dose Rate

January 3rd, 2016
by Joseph Magill

The new Neutron Dose Rate application in Nucleonica allows the user to calculate the dose rate for mono-energetic neutrons based on the Fluence Per Unit Dose Equivalent conversion factors from NRC regulations.

– The input source strength can be specified in neutrons/s or neutron flux cm-2 s-1 together with the energy of the mono-energetic neutrons and the distance from the source to detector. The output is given in mSv/h or mrem/h.

– The present version of the application does not allow for shielding. This will be introduced at a later stage based on the use of neutron removal coefficients.

More information…
Neutron Dose Rate wiki page

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Dosimetry & Shielding (D&S++): New Features

January 2nd, 2016
by Joseph Magill

Nucleonica’s Gamma Dosimetry & Shielding (D&S++) web application has been updated to include a number of new features:

– A new mode of operation has been introduced. In addition to the existing Gamma dose rate, Shield thickness, and Source strength modes a fourth “distance” mode is now available. This allows the user to calculate the distance between a source and the detector providing the source strength, shield and shield thickness, and the gamma dose rate are known.

– The Dose Rate/Thickness graph has been extended to include the half and tenth values of the shield material. The graph also show the results for narrow beam and broad beam (including the B-factor) geometries.narrowbroad2

– It is now possible to make dosimetry and shielding calculations for a single photon energy and photon emission rate (rather than selecting a radionuclide). In the drop-down menu for the source strength, in addition to selecting the activity, mass, or numbers of atoms, the user can select the photon emission rate, photons/s, and the photon energy.PhER

– The gamma and X-ray line spectrum has been extended to shown the photon intensity (photons per second) versus energy emitted from the source. Previously only the emission probability vs. energy was shown.

More information…
Dosimetry & Shielding++ wiki page

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Nuclide icons with updated box structure

October 14th, 2015
by Joseph Magill

Many of the Nucleonica applications show a nuclide icon at the top left of the application indicating which nuclide has been selected. These nuclide icons have now been updated to be consistent with the nuclide box structure used in the Nuclide Explorer++ and the Karlsruhe Nuclide Chart. In future versions of the applications, the box structure will also depend on the database selected (i.e. currently JEFF3.1 or ENDF/B-VII.1). To date this feature has been implemented in the Gamma Library++ application.
K-40More information…
Nuclide icon box structure in the Nuclide Explorer++ and the Karlsruhe Nuclide Chart

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