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Media type:
E-Article
Title:
Prompt γ radiation measured with a Nal scintillation detector: a beam monitor for neutron scattering instruments which needs no space in the beam
Contributor:
Holderer, O.
[Author];
Zamponi, M.
[Author];
Monkenbusch, M.
[Author];
Engels, R.
[Author]
Published:
IOP Publ., 2014
Published in:Journal of physics / Conference Series 528(1), 012038 (2014). doi:10.1088/1742-6596/528/1/012038
Footnote:
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Description:
We investigate the possibility of using the prompt γ rays emitted by aluminum windows in order to monitor the neutron flux of the beam. A Nal scintillation detector is used to detect the prompt γ rays. No additional material apart from the unavoidable Al windows along the flight path is placed in the beam. The performance of the monitor is compared to that of a standard BF3-monitor placed in the beam. Influences of a magnetic field on the photomultiplier of the Nal monitor is discussed, as well as the influence of activation gammas. At an instrument using a beam chopper the time behaviour is discussed.