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010   $a4-431-55606-0
024 7 $a10.1007/978-4-431-55606-0
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035   $a(EBL)2120628
035   $a(OCoLC)910622962
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035   $a(DE-He213)978-4-431-55606-0
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100   $a20150601d2015      u|         0
101 0 $aeng
135   $aur|n|---|||||
181   $ctxt
182   $cc
183   $acr
200 10$aDirect Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology /$fby Akira Miyazaki
205   $a1st ed. 2015.
210  1$aTokyo :$cSpringer Japan :$cImprint: Springer,$d2015.
215   $a1 online resource (130 p.)
225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053
300   $aDescription based upon print version of record.
311   $a4-431-55605-2 
320   $aIncludes bibliographical references.
327   $aIntroduction -- Experiment -- Analysis -- Discussion -- Conclusion.
330   $aIn this thesis, the author develops new high-power millimeter wave techniques for measuring the hyperfine structure of positronium (Ps-HFS) directly for the first time in the world. Indirect measurement of Ps-HFS in the literature might have systematic uncertainties related to the use of a static magnetic field. Development of the millimeter wave devices supports the precise determination of Ps-HFS by directly measuring the Breit-Wigner resonant transition from o-Ps to p-Ps without the magnetic field. At the same time, the width of the measured Breit-Wigner resonance directly provides the lifetime of p-Ps. This measurement is the first precise spectroscopic experiment involving the magnetic dipole transition and high-power millimeter waves. The development of a gyrotron and a Fabry-Pérot cavity is described as providing an effective power of over 20 kW, which is required to cause the direct transition from o-Ps to p-Ps. Those values measured by the newly developed millimeter wave device pave the way for examining the discrepancy observed between conventional indirect experiments on Ps-HFS and the theoretical predictions of Quantum Electrodynamics.
410  0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5053
606   $aNuclear physics
606   $aHeavy ions
606   $aAtomic structure  
606   $aMolecular structure 
606   $aPhysical measurements
606   $aMeasurement   
606   $aNuclear Physics, Heavy Ions, Hadrons$3https://scigraph.springernature.com/ontologies/product-market-codes/P23010
606   $aAtomic/Molecular Structure and Spectra$3https://scigraph.springernature.com/ontologies/product-market-codes/P24017
606   $aMeasurement Science and Instrumentation$3https://scigraph.springernature.com/ontologies/product-market-codes/P31040
615  0$aNuclear physics.
615  0$aHeavy ions.
615  0$aAtomic structure  .
615  0$aMolecular structure .
615  0$aPhysical measurements.
615  0$aMeasurement   .
615 14$aNuclear Physics, Heavy Ions, Hadrons.
615 24$aAtomic/Molecular Structure and Spectra.
615 24$aMeasurement Science and Instrumentation.
676   $a539.7212
700   $aMiyazaki$b Akira$4aut$4http://id.loc.gov/vocabulary/relators/aut$0654105
801  0$bMiAaPQ
801  1$bMiAaPQ
801  2$bMiAaPQ
906   $aBOOK
912   $a9910300402003321
996   $aDirect Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology$91773047
997   $aUNINA