Pa233 decay - unexpected high population of the 298.81 keV level of U233

[EneaMapelli]

Beta decay from Pa233 to U233 298.81 keV excited level have a relative intensity of 0.058962, directly from geant’s RadioactiveDecay5.2/z91.a233. From there 2 gamma are emitted of energies: 298.91 and 258.45 keV. Performing a simulation with geant4 10.04.02 results in many more gammas of these energies then expected, as can be seen for the 298.91 in figure.

I tried to set the relative intensity of this beta decay to zero in RadioactiveDecay5.2/z91.a233 but the uranium exited level is populated anyway. In experimental data such peaks have the correct intensities.
Any idea what’s going on?
Thank you.

[civanch]

Hello,

sorry for late answer, please, check new version Geant4 10.6.

VI

[Andrea]

Hi,

See my answer in this post:

Errors in Pa233 decay data

Hi, As introduced by EneaMapelli in the post of 25 July, there are some errors in the decay data of the Pa233. In fact, if i compare the simulated spectrum with the measured one there are a lot of differences. These problems were not present in a previous version of the photonevaporation data (i don’t remember the version, but published with Geant 4.9.6, now i’m on version 5.3). A big one (from z92.a233 photonevaporation data): There are a transition from the 415.758 keV level of the U233 w…

Thank you