Direct Measurement of the Hyperfine Structure Interval of Positronium Using High-Power Millimeter Wave Technology (Paperback, Softcover reprint of the original 1st ed. 2015)

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-Perot 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.

General

Imprint:	Springer Verlag,Japan
Country of origin:	Japan
Series:	Springer Theses
Release date:	October 2016
First published:	2015
Authors:	Akira Miyazaki
Dimensions:	235 x 155mm (L x W)
Format:	Paperback
Pages:	122
Edition:	Softcover reprint of the original 1st ed. 2015
ISBN-13:	978-4-431-56405-8
Categories:	Books > Science & Mathematics > Science: general issues > Scientific standards Books > Science & Mathematics > Physics > Atomic & molecular physics Books > Science & Mathematics > Physics > Nuclear structure physics
LSN:	4-431-56405-5
Barcode:	9784431564058

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