Message: neutron inelastic scattering on 127I Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

Question neutron inelastic scattering on 127I 

Forum: Hadronic Processes
Date: 27 Nov, 2012
From: Susana Cebrian <Susana Cebrian>

Hello, when simulating the energy spectrum registered by a NaI detector for a 252Cf neutron source, the "peak" due to the inelastic scattering of neutrons leaving 127I nuclides at its first excited state appear shifted to left.

To study the problem, I have created a quasi-infinite ideal detector made 100% of 127I and simulated only inelastic interactions for 1 MeV neutrons. I have registered separately energy deposited by electron/gammas and by I recoils in just the first neutron scattering, I attach the corresponding spectra expressed in counts/keV. I expected to find in the electron/gamma spectrum lines associated to the excited nuclear states of 127I (58, 203, 375, 418, 618 keV,... following, but as you can see at least the first four lines appear shifted to left about 16 keV. I have checked the file /data/PhotonEvaporation2.1/z53.a127 and the energies of the nuclear levels seem OK. There may be some missing energy in the nuclear deexcitation? I am using geant4.9.4.p01 and G4NDL3.14.

Thank you very much, best regards, Susana Cebrian


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

1 None: Re: neutron inelastic scattering on 127I   (michel maire - 28 Nov, 2012)
(_ None: Re: neutron inelastic scattering on 127I   (Susana Cebrian - 29 Nov, 2012)
 Add Message Add Message
to: "neutron inelastic scattering on 127I"

 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 ]