Message: Spontaneous fission source 252Cf in Geant4 !! Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Question Spontaneous fission source 252Cf in Geant4 !! 

Forum: Particles
Date: 01 Nov, 2013
From: Davinder Siwal <Davinder Siwal>

Dear Experts

I am trying to define the spontaneous fission source 252Cf in Geant4 using G4RadioactiveDecay class as defined in example rdecay01, here is the output of my simulation

 ======================== run summary ======================
 The run was 1000 Cf252[0.0] of 0 eV 
 ===========================================================

 Nb of generated particles: 

     Cf252[0.0]:    1000  Emean =      0 eV 	( 0 eV  --> 0 eV )

 Energy and momentum balance : final state - initial state
 (excluding gamma desexcitation from momentum balance) : 

  Energy:   mean =   -nan eV 	( 0 eV  --> 0 eV )
  Momentum: mean =   -nan eV 	( 0 eV  --> 0 eV )

 Time of life : mean =      0 ps   half-life =      0 ps    ( 0 ps  --> 0 ps )

 Activity =    inf Bq/g   (inf Ci/g) 

but it is not showing any decay of the 252Cf, however for the gamma decay like 137Cs source it is working well and giving me output as

======================== run summary ======================
 The run was 1000 Cs137[0.0] of 0 eV 
 ===========================================================

 Nb of generated particles: 

     Ba137[0.0]:    1000  Emean = 1.60229 eV 	( 0.0309374 eV  --> 9.39636 eV )
   Ba137[661.7]:     943  Emean = 1.39792 eV 	( 0.0309374 eV  --> 2.97201 eV )
     Cs137[0.0]:    1000  Emean =      0 eV 	( 0 eV  --> 0 eV )
      anti_nu_e:    1000  Emean = 363.363 keV	( 30.5667 keV --> 1.17026 MeV)
             e-:   18163  Emean = 17.9378 keV	( 61.3432 eV  --> 1.08921 MeV)
          gamma:     949  Emean = 591.222 keV	( 602.432 eV  --> 661.661 keV)

 Energy and momentum balance : final state - initial state
 (excluding gamma desexcitation from momentum balance) : 

  Energy:   mean = -14.3855 MeV	( -28.0954 MeV --> 3.06438 MeV)
  Momentum: mean = 52.2021 keV	( 0.000131393 eV  --> 1.18964 MeV)

 Time of life : mean = 1.40033e+09 s    half-life = 9.70632e+08 s     ( 87292.4 s   --> 9.66779e+09 s  )

 Activity = 3.13907e+12 Bq/g   (84.8398 Ci/g) 

can anybody tell me how to resolve this problem. I am currently using geant4.9.6.p02 and trying to see decay of 252 source using G4GeneralParticleSource as a particle generator

Thanks !!

 Add Message Add Message
to: "Spontaneous fission source 252Cf in Geant4 !!"

 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 ]