Long-lived activation products around the AGOR cyclotron at PARTREC

Weistra, Dirk (2021) Long-lived activation products around the AGOR cyclotron at PARTREC. Bachelor's Thesis, Physics.

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Abstract

The goal of the work presented in this thesis was to investigate the induced activity in one of the irradiation cells vaults (H-cell) at PARTREC of long-lived radionuclides in air using theory; in dust using a HPGe detector; and in the carbon beam stop and breadboard using a small Kromek GR1 CZT detector. Furthermore, the activity of two large magnets originating from the downstream part of the TRIµP beam line was investigated using the Kromek detector. For air it was determined that an activity due to 7 Be of 550 Bq/nAh is produced in a 3.5 m column of air for protons with energies higher than 100 MeV. Furthermore, it was determined that the carbon beam stop can be modelled as having an active inner cylinder with a homogeneous 7 Be distribution which had an activity 22(8) Bq/g. It was then established that for future experiments a single measurement with the Kromek GR1 CZT detector can be used to determine the activity of the beam stop using an efficiency of 1.7(3) × 10 -4 . Moreover, it was found that it is highly unlikely that the activity of 7 Be in dust in the H-cell poses any threat to personnel. In addition, on the breadboard 54 Mn was found with a maximum activity concentration of 1.00(6) Bq/g and 51 Cr with a maximum activity concentration of 0.29(4) Bq/g. Finally, the two magnets showed no measurable activity on both the inside and outside.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Graaf, E.R. van der and Dendooven, P.G.
Degree programme:	Physics
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	06 Jul 2021 11:14
Last Modified:	06 Jul 2021 11:14
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/24985

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