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Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology/ by Akira Miyazaki.
作者:	Miyazaki, Akira.
面頁冊數:	XIII, 122 p. 79 illus., 53 illus. in color.online resource. :
Contained By:	Springer Nature eBook
標題:	Nuclear physics. -
電子資源:	https://doi.org/10.1007/978-4-431-55606-0
ISBN:	9784431556060

Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology
Miyazaki, Akira.

Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology[electronic resource] /by Akira Miyazaki. - 1st ed. 2015. - XIII, 122 p. 79 illus., 53 illus. in color.online resource. - Springer Theses, Recognizing Outstanding Ph.D. Research,2190-5053. - Springer Theses, Recognizing Outstanding Ph.D. Research,.

Introduction -- Experiment -- Analysis -- Discussion -- Conclusion.

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.

ISBN: 9784431556060

Standard No.: 10.1007/978-4-431-55606-0doiSubjects--Topical Terms:

591618
Nuclear physics.

LC Class. No.: QC770-798

Dewey Class. No.: 539.7092

Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology
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