Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology / / by Akira Miyazaki
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| Autore: |
Miyazaki Akira
|
| Titolo: |
Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology / / by Akira Miyazaki
|
| Pubblicazione: | Tokyo : , : Springer Japan : , : Imprint : Springer, , 2015 |
| Edizione: | 1st ed. 2015. |
| Descrizione fisica: | 1 online resource (130 p.) |
| Disciplina: | 539.7212 |
| Soggetto topico: | Nuclear physics |
| Heavy ions | |
| Atomic structure | |
| Molecular structure | |
| Physical measurements | |
| Measurement | |
| Nuclear Physics, Heavy Ions, Hadrons | |
| Atomic/Molecular Structure and Spectra | |
| Measurement Science and Instrumentation | |
| Note generali: | Description based upon print version of record. |
| Nota di bibliografia: | Includes bibliographical references. |
| Nota di contenuto: | Introduction -- Experiment -- Analysis -- Discussion -- Conclusion. |
| Sommario/riassunto: | 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. |
| Titolo autorizzato: | Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology |
| ISBN: | 4-431-55606-0 |
| Formato: | Materiale a stampa  |
| Livello bibliografico | Monografia |
| Lingua di pubblicazione: | Inglese |
| Record Nr.: | 9910300402003321 |
| Lo trovi qui: | Univ. Federico II |
| Opac: | Controlla la disponibilità qui |
Serie:
Springer Theses, Recognizing Outstanding Ph.D. Research, . 2190-5053