Precision Measurement of Nuclear Energies Using the Non-Ferromagnetic Beta-Ray Spectrometer with Homogeneous Magnetic Field

Citation

Wilts, James Reed (1952) Precision Measurement of Nuclear Energies Using the Non-Ferromagnetic Beta-Ray Spectrometer with Homogeneous Magnetic Field. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/s729-3424. https://resolver.caltech.edu/CaltechTHESIS:07162025-144720077

Abstract

A new precision magnetic beta-ray spectrometer achieving simultaneously both high resolution and high luminosity is presented. The theory of its operation and design by Professor J. W. M. DuMond is traced.

Successful adaptation of a resonance absorption scheme using the magnetic moment of the proton for precisely measuring and controlling the magnetic field is reported.

The instrumental line profile is discussed. A new type of source due to Dr. D. E. Muller is shown to simplify the interpretation of experimental data by giving the spectral lines obtained from the conversion of nuclear gamma-rays a characteristic fiducial feature of high reproducibility.

The reproducibility of measurements claimed for the instrument is verified by the results of a study of the Thorium F and I lines. Repeated observations having a standard deviation for a single observation of less than one part in 10,000. are obtained.

Thesis Files