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Forum: Hadronic Processes
Re: Question neutron beam hit Zinc target (Tuoyu Cao)
Date: 27 Feb, 2013
From: Michael H. Kelsey <Michael H. Kelsey>

On Thu, 28 Feb 2013 03:56:02 GMT, Tuoyu Cao wrote:
> 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.

And what was your material definition? Natural zinc (material G4_Zn from the so-called "NIST" database) is 48.63% Zn-64, 27.9% Zn-66, 18.75% Zn-68, and a little bit of other isotopes.

> I saw the biggest peak in the
> gamma spectrum is on 1115.5 keV, which comes from Zn65->Cu65+gamma.

From reading your tracking dump:

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

The Zn65 came from the initial neutron, either by capture on Zn-64 or by spallation (n,2n) on Zn-66. Did that event contain a second neutron?

In other events, you should have also seen some Zn-67 and Zn-69 production in the same way.

  -- Michael Kelsey

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1 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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