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Production and Polarization of Radioactive Rubidium for Testing Lorentz Invariance

Dijck, E. A. (2012) Production and Polarization of Radioactive Rubidium for Testing Lorentz Invariance. Master's Thesis / Essay, Physics.

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Lorentz symmetry is a fundamental property of the Standard Model and no compelling evidence of its violation has been found to date. In the TRImP programme at KVI, the rotational-dependence of the weak decay rate of spin-polarized alkali nuclei will be tested. Two of the challenges in performing this experiment have been investigated for this thesis: the polarization and production of the radioactive nuclei. The polarization is achieved using optical pumping. Data sheets with the relevant optical parameters have been composed for isotopes of interest 80Rb and 82Rb. Numerical calculations have been performed to investigate the experimental requirements for creating highly polarized rubidium in krypton gas, showing that a laser flux of 5 mW/cm2 is sufficient to achieve > 90% nuclear polarization when pumping the rubidium D1 line in an environment of up to 10^2 mbar krypton gas. For the production of radioactive rubidium using a proton beam on a krypton target, production cross sections and several aspects of the target design have been explored, including the production purity, yield and beam losses due to scattering. Finally an analysis was performed of the isotopes produced during an experiment in preparation of the Lorentz invariance measurement.

Item Type: Thesis (Master's Thesis / Essay)
Degree programme: Physics
Thesis type: Master's Thesis / Essay
Language: English
Date Deposited: 15 Feb 2018 07:50
Last Modified: 15 Feb 2018 07:50

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