NEA-1894 INVENTDYN.MT.

InventDyn.MT

InventDyn.MT calculates the dynamics of the amount of isotope and its daughter nuclides with time stamps. Users can set the number of time bins and widths. Note that each time bin grows non –linearly according to the extension factor that user provided. Thus, the last scoring time and simulation accuracy are changed by modifying those parameters.

Also, the isomer state can be defined by setting ‘setIsomerHL’. That helps to investigate isomers which have various life times from long-lived isomers to ultra-short-lived ones. As the output, this program describes relative amount of an isotope and produced daughter nuclides in a time sequence normalizing their inventory as 1.

The Monte-Carlo method is used.

The running time of the calculation depends on the number of input isotopes and the number of events. A calculation of 1,000,000 sampling with one isotope takes about 80 seconds on an Intel i7 hexa-core process (3.20 GHz).

It is possible to define the half-life of isomer. Therefore, short-lived or ultra-short-lived isomers could be investigated with this code as well as long-lived ones.

Geant4.10.2.1 or higher version and related data files such as G4RadioactiveDecay and G4PhotonEvaporation.

• Evaluated Nuclear Structure Data File: A Manual for Preparing of Data Sets, J.K. Tuli, BNL-NCS-51655-01/02-Rev

• Solution of a System of Differential Equations Occurring in the Theory of Radio-active Transformations, H. Bateman, Proc. Cambridge Phil. Soc. 15, 423 (1910)

Any operating systems that support the Geant4 version 10.2 patch - 01 or higher. Note that Microsoft Windows platform currently not support multithreading.

Jounghwa Lee, Choong-Sup Gil, Do Heon Kim

Korea Nuclear Data Center

Korea Atomic Energy Research Institute (KAERI)

111, Daedeok-daero 989Beon-gil, Yuseong-gu, Daejeon

Republic of Korea