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Question neutron beam hit Zinc target 

Forum: Hadronic Processes
Date: 27 Feb, 2013
From: Tuoyu Cao <Tuoyu Cao>

Hi,

I used a 2.5 MeV neutron beam to hit a zinc target and analyse the gammas. I defined zinc material based on zinc isotopes. But since I used Shielding physics and its database dosen't have information for each isotopes so it uses nature_zinc instead. I saw the biggest peak in the gamma spectrum is on 1115.5 keV, which comes from Zn65->Cu65+gamma. Below is part of the outcome for one event. The question is where does the Zn65 come from since it is not stable.

Thanks a lot

Tuoyu

*********************************************************************************************************
* G4Track Information:   Particle = neutron,   Track ID = 1,   Parent ID = 0
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0     -5 mm   2.72 mm  -4.68 mm    2.5 MeV     0 eV      0 fm      0 fm   Absorber   initStep
    1   3.57 mm   2.72 mm  -4.68 mm   2.48 MeV     0 eV   8.57 mm   8.57 mm   Absorber   hadElastic

    :----- List of secondaries ----------------
       Zn65[0.0]:  energy =  16.3 keV  time = 392.5 ps 
    :------------------------------------------

    2   4.01 mm   2.58 mm     -5 mm   2.48 MeV     0 eV    565 um   9.13 mm   Absorber   Transportation
    3   5.42 mm   2.14 mm     -6 mm   2.48 MeV     0 eV   1.78 mm   1.09 cm      World   OutOfWorld

*********************************************************************************************************
* G4Track Information:   Particle = Zn65[0.0],   Track ID = 2,   Parent ID = 1
*********************************************************************************************************

Step#      X         Y         Z        KineE    dEStep   StepLeng  TrakLeng    Volume     Process
    0   3.57 mm   2.72 mm  -4.68 mm   16.3 keV     0 eV      0 fm      0 fm   Absorber   initStep
    1   3.57 mm   2.72 mm  -4.68 mm      0 eV   16.3 keV   134 nm    134 nm   Absorber      ionIoni
    2   3.57 mm   2.72 mm  -4.68 mm      0 eV      0 eV      0 fm    134 nm   Absorber   RadioactiveDecay

    :----- List of secondaries ----------------
    Cu65[1115.5]:  energy =0.4576 eV   time =3.588e+07 s  
            nu_e:  energy = 235.3 keV  time =3.588e+07 s  
    :------------------------------------------

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1 None: Re: neutron beam hit Zinc target   (Michael H. Kelsey - 27 Feb, 2013)
(_ Question: Re: neutron beam hit Zinc target   (Tuoyu Cao - 01 Mar, 2013)
(_ None: Re: neutron beam hit Zinc target   (Mike Kelsey - 01 Mar, 2013)
(_ Question: Re: neutron beam hit Zinc target   (Tuoyu Cao - 01 Mar, 2013)
1 None: Re: neutron beam hit Zinc target   (Mike Kelsey - 01 Mar, 2013)
2 None: Re: neutron beam hit Zinc target   (Koi, Tatsumi - 01 Mar, 2013)
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