Archive for January, 2019

Karlsruhe Nuclide Chart (Contour Chart) at URENCO, Netherlands

January 14th, 2019

Nucleonica has arranged the installation of a “contour” version of the Karlsruhe Nuclide Chart at the URENCO premises in Almelo, Netherlands.
The Chart was produced using a 4mm Dibond aluminium plate “cut-out” to fit in a space of height 2m and width 5m and assembled a small distance from the wall. The text is cut from adhesive foil and glued directly on the wall.
UERENCO_KNC_2018Karlsruhe Nuclide Chart (Contour Chart) at the URENCO premises in the Netherlands, Courtesy URENCO. For further information, contact info@nucleonica.com.

More information…
Other print versions of the Karlsruhe Nuclide Chart
Nuclide Charts
Contour Nuclide Chart for European Dialogue Centre

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Energy deposited in matter by nuclear and electronic stopping processes

January 14th, 2019

Qu. (from G.D. Fz-Juelich):
Dear Nucleonica Team, we have the following question regarding the energy deposited in matter by nuclear and electronic stopping processes:
We are interested in the respective contributions of nuclear stopping and electronic stopping to the (integral) energy deposited in solid materials during irradiation with heavy ions with defined energy (e.g. Au-197 ions with 5 MeV). Using the Range & Stopping Power++ App in Nucleonica, the results table provides only the values for the electronic and nuclear stopping at the materials’ surface (e.g. in keV/µm at depth 0 µm).
Bragg curve for 5MeV Au-197 on Water (liquid)
Integrating the Bragg curves (using the downloaded graph data) by the trapezoidal method suggests that the sum of the energies deposited by nuclear and electronic amounts only to 80 to 90% of the initial energy of the projectile. Is this correct (and if so, where is the remaining energy), and is there a more convenient way to directly calculate the amounts of energy deposited by each nuclear and electronic stopping, respectively, using either the Range & Stopping Power++ App in Nucleonica or SRIM/TRIM.

Ans. (Nucleonica Team)
The difference in the sum of the energies deposited by nuclear and electronic contributions come most probably from the limitations of numerical calculation procedure.
The difference is not due, for example, to Bremsstrahlung since Bremsstrahlung is considered only for light particles, i.e. incoming electrons and positrons. The R&SP++ app does not calculate Bremsstrahlung for heavy ions. This difference probably comes from the numerical procedure. Note the R&SP++ app uses the SRIM engine for heavy ions, so R&SP++ app and SRIM’s results are the same.
The Nucleonica Team will investigate this difference further.

More info…
Range and Stopping Power wiki page

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Nucleonica Newsletter 2019

January 6th, 2019

Dear Nucleonica Users,
Hopefully you had a great start into the New Year, and we wish you every success in 2019. For the Nucleonica Team, a major focus over the past year was the development and improvement of new and existing applications. Detailed information on these activities is described in this Newsletter.
A highlight in 2018 was the launch of the new 10th Edition of the Karlsruhe Nuclide Chart in early 2018. You can order your copy here.
A further highlight was the development of a new online e-Learning Training Centre, making the Nucleonica product knowledge more transparent and accessible.
NN2019The Nucleonica Team would like to thank you for your continued support.
Best wishes for 2019, Sincerely yours,
Joseph Magill, Managing Director

More information…
Nucleonica Newsletter 2019
Previous Newsletters
Nucleonica Newsletter 2018
Nucleonica Newsletter 2017
Nucleonica Newsletter 2016
Nucleonica Newsletter 2015
Nucleonica Newsletter 2014
Nucleonica Newsletter 2013
Nucleonica Newsletter 2012

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