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Record Nr. |
UNINA9910300402003321 |
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Autore |
Miyazaki Akira |
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Titolo |
Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology / / by Akira Miyazaki |
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Pubbl/distr/stampa |
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Tokyo : , : Springer Japan : , : Imprint : Springer, , 2015 |
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ISBN |
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Edizione |
[1st ed. 2015.] |
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Descrizione fisica |
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1 online resource (130 p.) |
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Collana |
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Springer Theses, Recognizing Outstanding Ph.D. Research, , 2190-5053 |
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Disciplina |
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Soggetti |
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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 |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references. |
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Nota di contenuto |
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Introduction -- Experiment -- Analysis -- Discussion -- Conclusion. |
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Sommario/riassunto |
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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 |
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