Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology [E-Book] / by Akira Miyazaki.
In this thesis, the author develops new high-power millimeter wave techniques for measuring the hyperfine structure of positronium (Ps-HFS) directly for the first time in the world. Indirect measurement of Ps-HFS in the literature might have systematic uncertainties related to the use of a static ma...
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Personal Name(s): | Miyazaki, Akira, author |
Edition: |
1st ed. 2015. |
Imprint: |
Tokyo :
Springer,
2015
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Physical Description: |
XIII, 122 pages 79 illustrations, 53 illustrations in color (online resource) |
Note: |
englisch |
ISBN: |
9784431556060 |
DOI: |
10.1007/978-4-431-55606-0 |
Series Title: |
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Springer Theses, Recognizing Outstanding Ph.D. Research
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Subject (LOC): |
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100 | 1 | |a Miyazaki, Akira, |e author | |
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505 | 0 | |a Introduction -- Experiment -- Analysis -- Discussion -- Conclusion. | |
520 | |a In this thesis, the author develops new high-power millimeter wave techniques for measuring the hyperfine structure of positronium (Ps-HFS) directly for the first time in the world. Indirect measurement of Ps-HFS in the literature might have systematic uncertainties related to the use of a static magnetic field. Development of the millimeter wave devices supports the precise determination of Ps-HFS by directly measuring the Breit-Wigner resonant transition from o-Ps to p-Ps without the magnetic field. At the same time, the width of the measured Breit-Wigner resonance directly provides the lifetime of p-Ps. This measurement is the first precise spectroscopic experiment involving the magnetic dipole transition and high-power millimeter waves. The development of a gyrotron and a Fabry-Pérot cavity is described as providing an effective power of over 20 kW, which is required to cause the direct transition from o-Ps to p-Ps. Those values measured by the newly developed millimeter wave device pave the way for examining the discrepancy observed between conventional indirect experiments on Ps-HFS and the theoretical predictions of Quantum Electrodynamics. | ||
650 | 0 | |a Nuclear physics. | |
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