Author Archive

Half-lives of the nuclides Rh-102 and Rh-102m

March 13th, 2018

Qu. (from M. D. KTE Karlsruhe): In using the platform Nucleonica I found some inconsistent data. The half-lives of the nuclides Rh-102 and Rh-102m are not the same in the different specified databases. The half-lives of Rh-102 and Rh-102m seem to be inverted at „JEFF-3.1“ in comparison to „ENDF/B-VII.1“ or „Nubase 2012“. Do you have information which the correct data for these two nuclides are?

Ans. (Nucleonica Team): The most relevant information on the radionuclide Rh-102, 102m half-lives can be found in the paper: M. Shibata et al. Applied Radiation and Isotopes Volume 49, Issue 12, 1 December 1998, Pages 1481-1487
Beta-decay half-lives and level ordering of Rh-102m,g. link
Citation from the abstract of this paper: Beta-decay half-lives of the ground state and an isomer of Rh-102 have been determined 207.3(17) d and 3.742(10) y, respectively, by γ-ray decay curves following each β-decay. It has been found that a state (2−) which has a shorter half-life (207.3 d) is the ground state from the result that the half-life of the 41.9 keV isomeric γ-transition was equal to 3.742 y. It has also been confirmed that the 41.9 keV transition is certainly an isomeric transition with X–γ coincidence measurement.
Rh-102The data for Rh-102 in the new 10th Edition of the Karlsruhe Nuclide Chart, 2018.
The data in Karlsruhe Nuclide Chart 10th edition, recent NUBASE file and ENSDF are based on this research. In JEFF3.1 the ground and metastable states were allocated incorrectly. We recommend to use the latest information based on the above mentioned research and summarised in the Karlsruhe Nuclide Chart as shown in the figure.

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Exemption & Authorisation Limits

February 20th, 2018

Based on the recently released Swiss RPO data (January 2018), this new Nucleonica application provides data on exemption and authorisation limits for radioactive materials. Based on assessment values for dose coefficients for ingestion and inhalation, together with specific dose rates at various tissue depths for external radiation (h10, h0.07, and hc,0.07), values are given for the operational radiation protection quantities together with exemption and authorisation limits and guidance values.
EandA-AvIn summary, the application has the following main features:
– Based on the dose coefficients for ingestion and inhalation, together with specific dose rates at various tissue depths for external radiation (h10, h0.07, and hc,0.07), exemption limits LE, authorisation limits LL, and guidance values for airborne CS and surface contamination CS are given.
– From the above quantities, and the user specified activity (Bq) and surface contamination (Bq/cm2), the total doses for ingestion, inhalation and external radiation (H10, H0.07, and Hc,0.07) are calculated.
– The latter quantity, Hc,0.07 allows the user to calculate the dose rate to skin following a spill of radioactive material.
– a table of the Swiss Operational radiation protection data is provided together with links to the corresponding web pages in French and Germany are given.

More information…
Swiss Radiological Protection Ordinance (RPO), Status 1 January 2018
Exemption & Authorisation limits wiki page

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Swiss Operational Radiation Protection (RPO) Data for 2018 in Nucleonica

February 13th, 2018

The Swiss Radiological Protection Ordinance (RPO) with status as of 1 January 2018 is now available. As part of its verification procedure, the Nucleonica team provides an annual check on the various quantities listed in this report and used in Nucleonica applications.

More information…
Swiss Radiological Protection Ordinance (RPO), Status 1 January 2018
Nucleonica’s radiological transport assistant e-Ship application

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Karlsruhe Nuclide Chart Online Shop

February 12th, 2018

A new online shop for the purchase of printed versions of the Karlsruhe Nuclide Chart is available at
KNC10-OnlineShop2A nuclide chart is a two dimensional representation of the nuclear and radioactive properties of all known atoms. A nuclide is the generic name for atoms characterized by the constituent protons and neutrons. In contrast to the periodic table which is based on chemical behaviour, the nuclide chart arranges nuclides according to the number of protons and neutrons in the nucleus. Each nuclide in the chart is represented by a box containing the element symbol and mass number, natural abundance, half-life, decay types and decay energies. The nuclides boxes are coloured according to their decay properties. Nuclear isomers, or excited states, can be represented by sub-dividing the box accordingly.
The new edition of the “Karlsruher Nuklidkarte” contains radioactive decay data on 696 nuclides (47 new nuclides) not found in the previous edition. In total, nuclear data on 4040 experimentally observed ground states and isomers are presented. Although many nuclear data sources are available on the internet, the Karlsruhe Nuclide Chart provides a unique overview of current knowledge and is for many the preferred medium for ease of use, convenience and practicality. This new 10th edition coincides with the 60th anniversary of the Karlsruhe Nuclide Chart which first appeared in 1958.
More info…
Online shop
Karlsruhe Nuclide Chart, 10th Edition 2018

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New 10th Edition (2018) of the Karlsruhe Nuclide Chart

February 10th, 2018

The 10th edition of the “Karlsruher Nuklidkarte” contains new and updated radioactive decay data on 696 nuclides (47 new nuclides) not found in the previous (2015) edition. In total, nuclear data on 4040 experimentally observed ground states and isomers are presented.
KNC10The new names and chemical symbols of elements 113, 115, 117, and 118 have been updated. In 2016, IUPAC agreed on the names nihonium (113, symbol Nh), moscovium (115, Mc), tennessine (117, Ts), and oganesson (118, Og). Until now, these elements have been referred to simply by the number of protons in each atom – 113, 115, 117 and 118, respectively. Most recent values of the atomic weights, isotopic abundances and cross sections are included together with the thermal fission yields for both U-235 and Pu-239. For twelve elements, a range of atomic weights is given to reflect the isotopic variability in natural materials. The accompanying booklet again contains the multi-lingual “Explanation of the Chart of the Nuclides” in English, German, French, Spanish, Russian, and Chinese, updated to reflect changes in the Chart. The Reduced Decay Schemes section, initiated in previous editions, has been considerably expanded to include a total of 88 examples.
This new 10th Edition of the Karlsruhe Nuclide Chart is the result of a collaboration between Zsolt Sóti from the EC’s Joint Research Centre and Joseph Magill and Raymond Dreher from the Nucleonica team. An online version of the Karlsruhe Nuclide Chart Online is available through the Nucleonica nuclear science portal ( This new 10th Edition coincides with the 60th anniversary of the Karlsruhe Nuclide Chart.

More info…
Online shop
Karlsruhe Nuclide Chart, 10th Edition 2018

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New Nucleonica web page header

February 1st, 2018

The new web page header in Nucleonica is based on the principles of Responsive Web Design (RWD) and Flat Design and is optimised for easy navigation on a variety of devices and window or screen size (e.g. tablets and smartphones). Web page headers are like miniature versions of the home page located at the top of the internal web pages. Similar to the landing page, the function of the header is to provide site identity and easy navigation through the web pages.
Nu-HeaderThe web page header provides links to:
– the App Portal for navigation through all the Apps (shown in image above),
– the Networking page (with links to the wiki, blog, FAQs, etc.),
– the original Classic app navigation page (for a limited period),
– User Preferences (My Profile, My Settings, My Community, Recent Members, etc.),
– Help (context sensitive help to the wiki pages describing the Apps) and
– Logout

Wiki page

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Nucleonica Newsletter 2018

January 1st, 2018

Dear Nucleonica Users,
Hopefully you had a successful 2017 and a good start into the new year. For the Nucleonica Team, a major focus during the past year was on the development of a new Nucleonica landing page. In addition, a new web page (App Portal) has been specifically designed to enhance the navigation through the ever-increasing number of Nucleonica applications and tools. These web pages are based on the principles of Responsive Web Design (RWD) and are optimised for easy navigation across devices (i.e. PCs, tablets and smartphones). Through the use of filters, the user can access all Nucleonica applications and tools (“show all”) or a subset of these applications and tools based on the most recently used (“last used”), most popular (“popular”), type (“applications”, “data”, “knowledge”), etc. enabling you to find your desired application more easily and quickly.
NN_2018Nucleonica Online Applications
Again, we have extensively upgraded and re-written a wide range of applications. In particular, the following new applications have been created: Reduced Decay Schemes, Coincidence Summing Corrections++, Beta Energy Spectra, Beta Dose Rates, App Portal, CoReT Concept Repository Temperatures. Pages 2-9 describe these new developments in more detail.

Dedicated Training Courses
Introductory and advanced courses provide expert training for our users. Specialist courses on nuclear security demonstrate the power of the Nucleonica applications in this area. For more information see pages 12-13.
To enquire about Nucleonica training courses, please send an email to

Karlsruhe Nuclide Chart, new 10th Edition 2018
The new 10th edition of the Karlsruhe Nuclide Chart is in the final stages of preparation. Publication is planned for early 2018 to coincide with the 60th anniversary of the Chart through collaboration with the European Commission’s Joint Research Centre. The new element names recently accepted by IUPAC have been included in the new edition. To order copies of the most recent version of the Chart, please click here. More information can be found on pages 10-11.

We Welcome your Feedback
We value the many suggestions and proposals which we received during 2017 from all our partners and users that helped us improve the platform. Three major new applications on Coincidence Summing Corrections, Beta Dose Rates, and Concept Repository Temperatures (CoReT) have been developed through collaboration with our colleagues from SCK·CEN, CERN, and the Interkantonales Labor (Switzerland), respectively.

On the following pages, this Newsletter informs you in more detail about the above developments.
I would like to thank you for your continued support and best wishes for 2018.
Sincerely yours,
Joseph Magill
Managing Director

More information…
Nucleonica Newsletter 2018
Previous Newsletters
Nucleonica Newsletter 2017
Nucleonica Newsletter 2016
Nucleonica Newsletter 2015
Nucleonica Newsletter 2014
Nucleonica Newsletter 2013
Nucleonica Newsletter 2012

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CoReT: Concept Repository Temperatures

December 18th, 2017

The disposal of high-level radioactive waste in deep geological repositories requires stable and foreseeable physical conditions over very long time scales. During this period, the chemical stability of both the natural and the engineered barriers is governed by thermally activated processes. These in turn are driven by the heat pulse generated by the nuclear decay of waste products. The technical concept to cap the temperature peak in the repository is thus an important aspect for the proof of safety of disposal facilities.
600px-CoReT0With the CoReT (Concept Repository Temperatures) application in Nucleonica, the user can specify the repository configuration (galleries and waste canisters), waste canister properties and thermal properties of surrounding environment and estimate the temperature evolution at various points in the repository as a function of time. Extensive validaiton of the new applicaiton is described in the wiki page.

More inoformation:
CoReT wiki page

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Radiological Converter vs. Mass Activity Converter++?

November 11th, 2017

(Qu.) What are the main differences between the Radiological Converter and the Mass Activity Converter++?
(Ans. Nucleonica Team) The Radiological Converter is a further development of the Mass Activity Converter++ with the following additional features:
* The list of conversion quantities now includes a) Air Kerma Rates b) Exposure Rates 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.
* 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)

The Radiological Converter thereby provides the internationally accepted ambient dose H*(10) and is suitable for declarations of radioactive packages.

More info…
Radiological Converter wiki page

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Nuclear Security training course at BfS

November 10th, 2017

Nucleonica Training on Nuclear Security, 7-8 November, BfS Berlin, 2017
This 1-day training course took place at the offices of the Federal Office for Radiation Protection (Bundesamt für Strahlenschutz BfS) in Berlin, during the 7-8 November 2017. This was an intermediate level training course which focused mainly on the Nucleonica core applications with emphasis on Case Studies. A detailed description of nuclear data with particular reference to the various Nucleonica nuclear databases was given. Core applications were demonstrated through the use of Nucleonica applications such as the Radiological Converter, Nuclide Mixtures, Decay Engine++, and Dosimetry and Shielding H*(10).
BetasinTissueStopping of 500 keV beta particels in 1 mm tissue.

The main differences between the
1. Radiological Converter vs. Mass Activity Converter and
2. Dosimetry & Shieldimg++ vs. Dosimetry & Shielding H*(10)
were described in detail. Nuclear security related case studies were given on the identification of suspected nuclear and radioactive materials using Cambio and WESPA++.
In total, 12 persons took part in the course from the various BfS locations in Germany.

More info…
Nucleonica Training Course Proceedings

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