Fast Photoneutron Detection
(2016) PHYM01 20151Department of Physics
Nuclear physics
- Abstract
- The purpose of this project was to investigate fast photoneutron production from a
series of materials commonly used for backing neutron beam guides. Fast neutrons
were knocked out of these materials by exposing them to to high-energy photons at
the Tagged-Photon Facility at MAX-lab in Lund, Sweden. Liquid scintillator detectors
at different angles around the targets registered the photoknockout neutrons. These
fast-neutron detectors were energy calibrated using two well-understood gamma-ray
sources. The energy calibrations were used to establish the hardware detector thresh-
olds. The hardware thresholds server as input to an absolute neutron-detection efficiency
Monte Carlo simulation known as STANTON, which was used to establish... (More) - The purpose of this project was to investigate fast photoneutron production from a
series of materials commonly used for backing neutron beam guides. Fast neutrons
were knocked out of these materials by exposing them to to high-energy photons at
the Tagged-Photon Facility at MAX-lab in Lund, Sweden. Liquid scintillator detectors
at different angles around the targets registered the photoknockout neutrons. These
fast-neutron detectors were energy calibrated using two well-understood gamma-ray
sources. The energy calibrations were used to establish the hardware detector thresh-
olds. The hardware thresholds server as input to an absolute neutron-detection efficiency
Monte Carlo simulation known as STANTON, which was used to establish the best-case
neutron-detection efficiency achieved in the measurement. Finally, the detector thresh-
olds were increased in software to study the reduction in detection efficiency as a function
of the increase in threshold. A complete overview of the project is presented. (Less) - Popular Abstract
- Neutrons are very small particles with no charge that you normally find in the nucleuses of atoms. Thanks to their lack of charge neutrons have very attractive properties when used to examine other materials. In this thesis a problem facing modern neutron sources, called spallation sources, is investigated.
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/student-papers/record/8862543
- author
- Rofors, Emil LU
- supervisor
-
- Kevin Fissum LU
- organization
- course
- PHYM01 20151
- year
- 2016
- type
- H2 - Master's Degree (Two Years)
- subject
- keywords
- Neutron, neutron detection, spallation, scintillator, Monte Carlo
- language
- English
- id
- 8862543
- date added to LUP
- 2016-03-18 16:04:55
- date last changed
- 2016-03-18 16:04:55
@misc{8862543, abstract = {{The purpose of this project was to investigate fast photoneutron production from a series of materials commonly used for backing neutron beam guides. Fast neutrons were knocked out of these materials by exposing them to to high-energy photons at the Tagged-Photon Facility at MAX-lab in Lund, Sweden. Liquid scintillator detectors at different angles around the targets registered the photoknockout neutrons. These fast-neutron detectors were energy calibrated using two well-understood gamma-ray sources. The energy calibrations were used to establish the hardware detector thresh- olds. The hardware thresholds server as input to an absolute neutron-detection efficiency Monte Carlo simulation known as STANTON, which was used to establish the best-case neutron-detection efficiency achieved in the measurement. Finally, the detector thresh- olds were increased in software to study the reduction in detection efficiency as a function of the increase in threshold. A complete overview of the project is presented.}}, author = {{Rofors, Emil}}, language = {{eng}}, note = {{Student Paper}}, title = {{Fast Photoneutron Detection}}, year = {{2016}}, }