Message: Beta-decay spectrum shape Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Question Beta-decay spectrum shape  

Keywords: GEANT 4.7.0, beta-spectrum, GenaralParticleSource
Forum: Particles
Date: 10 Nov, 2005
From: Ilya <>


I'm making simulation of the 60Co beta-decay and I have the question concerning the way how the 60Co spectrum is generated in GEANT. I'm using G4GeneralParticleSource to simulate the decay. The shape I obtain is different from what I see in the experiment and also from the one I found on the Lund/LBNL website ( The biggest difference is in the energy region below 70 keV. At this energy spectrum generated with GEANT has a maximum while spectrum from Lund/LBNL database goes up continiously to the lowest energy. The average energy of the beta-decay for the GEANT-generated spectrum is also about 10 keV higher than the one that can be found in databases.

The question is what causes such a difference and how precise is the spectrum below 100 keV?

I tried to find some formulas and theoretical description put into the basis of beta-spectrum generated in GEANT but there is not enough information available in all GEANT documentation. If somebody could provide some references on this topic that would be really great.

Thanks a lot, Ilya.

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

 Add Message Add Message
to: "Beta-decay spectrum shape "

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews

[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]