Muon interaction with lead shielding producing activation: implications for gamma-ray spectrometry

Turnbull, S 2011, Muon interaction with lead shielding producing activation: implications for gamma-ray spectrometry, Masters by Research, Applied Science, RMIT University.


Document type: Thesis
Collection: Theses

Attached Files
Name Description MIMEType Size
Turnbull.pdf Thesis Click to show the corresponding preview/stream application/pdf;... 2.18MB
Title Muon interaction with lead shielding producing activation: implications for gamma-ray spectrometry
Author(s) Turnbull, S
Year 2011
Abstract This work investigates the generation of neutron flux inside lead shielding due to cosmic rays as a function of shielding thickness by use of the GEANT Monte-Carlo modelling code. GEANT allows for the Monte-Carlo modelling of the transport of particles in matter. This includes muons, the particles of interest here, which originate from cosmic ray showers

As part of this project an estimate of the gold activation rate, the number of 198Au isotopes produced during irradiation from neutrons produced from muon interaction with Pb in the shielding of a Gamma Ray Spectroscopy (GRS) detector, was determined. The source of the muons was cosmic rays which interacted with particles in the atmosphere. The main results of this project can be summarised as follows:

1. The creation of neutrons from muons interacting with lead shielding is a significant effect which must be taken into account in accurate GRS experiments.

2. The production of neutrons is relatively constant in the muon energy range of 200-800 MeV

3. The neutron energy spectrum is effectively the same over the muon energy range 200-800 MeV.

4. From the point of view of neutron activation of gold, the activation rate of gold atoms is maximised at muon energy of 600 MeV.

Data obtained from these simulations is of general importance for the optimisation of materials used in shielding for gamma-ray spectrometry.

Degree Masters by Research
Institution RMIT University
School, Department or Centre Applied Science
Keyword(s) Monte-Carlo modelling
GEANT4
Gamma Ray Spectroscopy
Versions
Version Filter Type
Access Statistics: 295 Abstract Views, 1681 File Downloads  -  Detailed Statistics
Created: Fri, 23 Jan 2015, 11:31:14 EST by Denise Paciocco
© 2014 RMIT Research Repository • Powered by Fez SoftwareContact us