Zeitschrift für Physik

, Volume 167, Issue 1, pp 111–122 | Cite as

A search for nuclear structure effects in Tm169

  • Z. Grabowski
  • J. E. Thun
  • M. S. El-Nesr
  • W. D. Hamilton
Article

Abstract

The study of nuclear structure effects in internal conversion has been extended to the Tm169 nucleus. Gamma-gamma, electron-gamma and gamma-electron directional correlations of the 177 keV-131 keV and the 198 keV-110 keV cascades have been measured. The following results were obtained:
$$\begin{array}{l} A_2 (177\gamma - 131\gamma ) = + 0 \cdot 275 \pm 0 \cdot 007,A_4 (177\gamma - 131\gamma ) = - 0 \cdot 005 \pm 0 \cdot 016, \\ A_2 (177\gamma - 131\gamma ) = + 0 \cdot 002 \pm 0 \cdot 007, \\ A_2 (177\gamma - 131K) = + 0 \cdot 497 \pm 0 \cdot 010, \\ A_2 (198\gamma - 110\gamma ) = + 0 \cdot 295 \pm 0 \cdot 007,A_4 (198\gamma - 110\gamma ) = - 0 \cdot 013 \pm 0 \cdot 017, \\ A_2 (198K - 110\gamma ) = + 0 \cdot 001 \pm 0 \cdot 008, \\ A_2 (198\gamma - 110K) = - 0 \cdot 005 \pm 0 \cdot 006. \\ \end{array}$$
.

The results of the electron-gamma directional correlation measurements for the strongly retardedK-forbidden 177 keVM 1 transition are in agreement with the theory for smallλ-values. It is thus concluded that nuclear structure effects are not appreciable. For the retardedK-forbidden 198 keVM 1 transition the experimental results are also in agreement with theory for smallλ-values but do not exclude highλ-values.

Keywords

Elementary Particle Structure Effect Nuclear Structure Correlation Measurement Internal Conversion 

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Copyright information

© Springer-Verlag 1962

Authors and Affiliations

  • Z. Grabowski
    • 1
  • J. E. Thun
    • 1
  • M. S. El-Nesr
    • 1
  • W. D. Hamilton
    • 1
  1. 1.Institute of PhysicsUniversity of UppsalaUppsalaSweden

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