Gamma spectroscopy using HPGe detector

[maitreyee.nandy]

Dear members

It would be nice if someone posts any working example input file of gamma spectroscopy using HPGe detectors for Co-60 or Cs-137. Just wanted to learn and use it as a help file. I tried using USRTRCK, got a delta function like response. I also tried using DETECT card but got a large respinse at very low energies.

Thank you
Maitreyee

[horvathd (Dávid Horváth)]

Dear Maitreyee,

here is a simple example: hpge.flair (2.2 KB)

To get more realistic result a Gaussian broadening needs to be applied for the DETECT scoring. To do this, see:

How to get full-energy-peak efficiency?

Dear @shusheng, I updated the user routine applying the Gaussian broadening in FLUKA: usreou.f (2.4 KB) This fixes some issues with the storing the status of the smoothing with the previous one. To make it work, a dummy DETECT scoring has to be added after all other DETECT cards. It implements the energy dependent FWHM, (the same as the one used in MCNP’s GEB keyword) FWHM = a + b \sqrt{E + c E^2} where a, b and c are the detector dependent constants. The attached example applies an energy…

Cheers,
David

[maitreyee.nandy]

Thank you, David
Regards
Maitreyee