Electron Capture in the Decay of
- 1 March 1954
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 93 (5), 1076-1081
- https://doi.org/10.1103/physrev.93.1076
Abstract
The ratio of electron capture to positron emission in the decay of to the 1.28-Mev level in has been determined by a comparison of the intensities of positron emission and 1.28-Mev radiation. The measurements were made with a coincidence arrangement employing a beta counter to detect the positrons and a scintillation counter for the rays. By varying the bias of a discriminator responding to the spectrum, one can determine the efficiency of the beta counter, and the product of this efficiency and the fraction of decays which undergo electron capture. These measurements lead to a value of 0.110±0.006 for the ratio of electron capture to positron emission. If one assumes that the decay is allowed (, no) the theoretical value is 0.1135. By a comparison of these values, we can make an estimate of the magnitude of the Fierz interference term. We find, subject to the above assumption, that the ratio of the axial vector and tensor coupling constants percent.
Keywords
This publication has 17 references indexed in Scilit:
- Excited States of Even-Even NucleiPhysical Review B, 1953
- Spectrometer Measurement on the High Energy Positrons of Sodium 22Physical Review B, 1953
- The Measurement and Interpretation of the Auger Intensities of , , andPhysical Review B, 1953
- A Flexible Pulse Amplifier with Good Overload PropertiesReview of Scientific Instruments, 1952
- Atomic Beam Magnetic Resonance Experiments with Radioactive Elements , , , andPhysical Review B, 1949
- Experimental Test of Beta-Ray Theory for the Positron Emitters , , ,Physical Review B, 1946
- Die in Magnesium durch Deuteronen erzeugten Aktivitäten und die Frage desK-Einfangs bei Na22The European Physical Journal A, 1944
- An Apparatus for Determining the Transmission of Slow Electrons Through Thin Collodion FilmsReview of Scientific Instruments, 1938
- Der Nutzeffekt der Röntgen‐K‐Fluoreszenzstrahlung bei den Elementen C, N, O, NeAnnalen der Physik, 1936
- The Compound Photoelectric Effect of X-rays in Light ElementsPhysical Review B, 1932