Hello,
I’m trying to simulate a Cesium139 spectrum in a gamma spectroscopy simulation, but the best I can get for this isotope is the following graph:
I’m basing myself off of the rdecay02 example. Simulating Barium is no issue, but I can’t get Cesium to work. I’d appreciate any help!
Thanks
you are simulating Cs-139 and does not have any intense gammas leaving 627 (1% BR) and 1283 (8% BR). The spectrum you presented is from 0 to 200 keV, where only two gammas decaying via beta mode (b-) with BR less than 0.001% times.
| Eg (keV) | Ig (%) | Decay mode |
|---|---|---|
| 188.88 20 | 0.0091 17 | b- |
| 196.51 18 | 0.0100 17 | b- |
| 230.76 9 | 0.036 3 | b- |
Ref: - Table of Isotopes decay data
VRS
Hi, thanks for the answer! From what I understood about G4 simulations, the reactions from daughter isotopes are also tracked, so I was expecting a 166keV peak as well. I’m assuming that the issue has to do with tracking secondaries, but I’m not sure…
For tracking secondaries i suggest you to calculate the surface current of particles ( first hit of particle in tracking medium) and choose a gate on a particle to reproduce spectra. This you can achieve in steppinAction class.
VRS