Beta Dose Rate Application with Personal Dose Equivalent Hp(0.07)

April 26th, 2017
by Joseph Magill

Nucleonica’s Beta Dose Rate application has been extended to include the personal dose equivalent Hp(0.07) @ 10 cm in air for over 760 beta emitting nuclides. The beta spectrum for each endpoint beta energy is used to calculate the flux at a distance of 10 cm from the source. Using the conversion coefficients (from Monte Carlo calculations) for electrons for flux to dose in air, the dose rates at a depth of 0.07 mm are calculated.
BDR_ValOf the 763 beta emitters for which data is available, there is good agreement to within 20% for 88% of all nuclides with recent literature values (Otto 2016). For 66 nuclides (8.6%) agreement is in the range 20 -100% (i.e. a factor two). For 22 nuclides there is quite a large disagreement (> factor 2).
A colour coding system has been introduced: green (good agreement within 20%); yellow (agreement to within a factor 2); and red where there are larger discrepancies. In the latter case care must be used with the values given (i.e. need to check the underlying nuclear data).

More information
Beta Dose Rate wiki page
T. Otto, Personal Dose-Equivalent Conversion Coefficients for 1252 Radionuclides, Radiation Protection Dosimetry (2016), Vol. 168, No .1, pp1-70. Link

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Beta Energy Spectra

April 12th, 2017
by Joseph Magill

The Beta Dose Rate application has been extended to include the beta energy spectrum using the end-point energies for all beta- and beta+ emitters. Beta spectra can be generated for both individual nuclides and nuclide mixtures.
Cl38 BetaSpectra The graph shows the spectrum for each of the three beta end-point energies for Cl-38. In addition, the sum of the spectra is also shown. It is also possible to show the end-point energies, the spectrum, and the end-point energies superimposed on the spectra.
The underlying data used in the calculations are currently from the international nuclear datafiles JEFF3.1 for ß- and 8th TORI for ß+.

More information…
Beta spectrum wiki page in Nucleonica
Reduced Decay Schemes

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Nucleonica Training Course, CERN, 5-6 April 2017

April 9th, 2017
by Joseph Magill

Introduction to Nucleonica: Core Applications and Tools, 5-6 April, CERN, Switzerland, 2017.
This 2-day training course took place at CERN, Switzerland, during the 5-6 April 2017. This was an introductory 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 new Radiological Converter, Nuclide Mixtures, Decay Engine++, and Dosimetry and Shielding H*(10).
CERN_April2017A key lecture was given by Mr. Yann Donjoux (CERN) on the e-Ship++ radiological transport assistant application in Nucleonica. A special session was devoted to gamma spectrometry tools including the Gamma Spectrum Generator, Gamma Library, Cambio and WESPA. The latter tools (Cambio and WESPA) were used for the identification nuclear and radioactive materials.
In total, 12 persons took part in the course from CERN.
Speakers included Mr. Y. Donjoux (CERN) in addition to Dr. J. Magill and Mr. R. Dreher from the Nucleonica team.

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Nucleonica website connection now secure.

March 28th, 2017
by Joseph Magill

From 27 March 2017 the Nucleonica website connection has been made secure through the use of a SSL certificate. Access to nucleonica is now through Using the older link will result in a redirection to the new secure link.
SecureN2Pages that need to transmit private information, such as credit cards, personal information and passwords, need to have a secure connection to help prevent attackers from stealing your information. (A secure connection will have “HTTPS” in the address bar, along with a green lock icon.)

More information
Insecure password warning

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Obituary Gerda Pfennig, 8.12.1930 – 16.2.2017

March 1st, 2017
by Joseph Magill

Gerda Pfennig, “Mother” of the Karlsruhe Nuclide Chart, died on 16 February 2017 aged 86.
GerdaPfennigBorn on 8 Dec. 1930, Gerda Pfennig received her training in chemistry at the Fachschule Fresenius, Wiesbaden. In 1958, she joined the Institut für Radiochemie (Institute of Radiochemistry) of the Kernreaktor Bau- und Betriebsgesellschaft mbH (Nuclear Reactor Building and Operating Company) in Karlsruhe. The first edition of the Karlsruhe Nuclide Chart, printed in 1958 in the form of a wall chart, was created by Walter Seelmann-Eggebert and his assistant Gerda Pfennig. Since this first edition, Frau Pfennig has co-authored all editions of the Chart until the 9th Edition in 2015. During the period 2006-2012 Frau Pfennig was working at the European Commission’s Institute for Transuranium Elements on the 7th (2006) and 8th (2012) editions of the Chart. From 2012-2015 she was actively involved with Nucleonica GmbH on the 9th edition of the Chart. Her life was marked with a passion for music, tennis and the nuclide chart.
In the field of nuclear data Frau Pfennig was both conscientious and dedicated and an inspiration to her colleagues. We will always keep her in our memories.

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Coincidence Summing Corrections++

February 24th, 2017
by Joseph Magill

True Coincidence Summation occurs when two gamma-rays are emitted during the same decay event of the nucleus, so that they appear to be emitted instantaneously. This seemingly instantaneous emission of separate gamma-rays is known as coincidence. In this situation the detector will see both of the gamma-ray energies as one larger energy deposited in the detector. A tell-tale sign of coincidence is a summation peak that appears at the combined energy of the two characteristic gamma-rays of the source.
CSC_Co60CSC2The Coincidence Summing Corrections++ application offers the possibility of calculating the coincidence summing correction factors for a large number of radionuclides and for virtually any detector and sample size, density and composition. The results are given gamma-line by gamma-line, with the unaffected lines having a correction factor of 1.

Additional information
Coincidence Summing Corrections++ wiki page

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Reduced Decay Schemes

February 23rd, 2017
by Joseph Magill

The Reduced Decay Schemes is a new application for displaying the reduced decay schemes of selected nuclides.
The nuclear data contained in the nuclide boxes (in the Karlsruhe Nuclide Chart for example) is concise due to the very limited space available. In order to obtain maximum benefit from the nuclide chart, it is important to know how to interpret the box contents correctly. In the new application, the contents of the nuclide boxes are explained in detail by making reference to the nuclide reduced decay scheme in order to relate the box contents with information on energies of emitted particles with the energy levels in the nucleus in the decay scheme diagram. Additional data has been taken from the Nuclear Data Sheets and Nucleonica’s Datasheets.
RDS_K42 To improve understanding, some transitions not mentioned in the box are added and indicated as dotted lines. Corresponding data is also indicated in grey. Radiations with a low emission probability indicated by dots or brackets in the nuclide box are also drawn with dotted lines.
Additionally a gamma spectrum of the particular nuclide is shown (generated by Nucleonica’s Gamma Spectrum Generator application).

More Information…
Reduced Decay Schemes wiki page
Gamma Spectrum Generator

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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
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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