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Radioactive decay of 1.7-h149Nd to levels of transitional149Pm

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

Sources of149Nd were produced by thermal-neutron irradiation of enriched148Nd. High resolution Ge(Li) spectrometers were used to collect gamma-ray singles and coincidence spectra in the study of the decay of 1.7-h149Nd. A total of 214 gamma rays have been assigned to the decay of149Nd, and 201 of these transitions have been placed in a level scheme of149Pm involving 42 excited states. Absolute values for the beta-group intensities were determined for transitions to the149Pm levels, and spin and parity assignments were made for many of the observed states. The experimentally determined level structure of149Pm was compared with corresponding levels in other odd-mass Pm and Eu nuclides. Interpretations were made in terms of the core-coupling model.

Radioactive decay148Nd(n, γ)149Nd; measuredE γ,I γ,γ-γ coinc.149Pm deduced levels,J,π. Compton-suppression. Ge(Li) detector. Enriched targets.

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Author notes

  1. E. W. Schneider

    Present address: General Motors Research Laboratories, 48090, Warren, Michigan

  2. M. D. Glascock

    Present address: Research Reactor Facility, University of Missouri, 65201, Columbia, Missouri

Authors and Affiliations

  1. Department of Chemistry and Cyclotron Laboratory, University of Maryland, College Park, MD, USA

    E. W. Schneider, M. D. Glascock & W. B. Walters

  2. Nuclear Chemistry Division, Lawrence Livermore Laboratory, Livermore, CA, USA

    R. A. Meyer

Authors
  1. E. W. Schneider
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  2. M. D. Glascock
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  3. W. B. Walters
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  4. R. A. Meyer
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Additional information

The authors wish to thank Drs. A. Pakkanen and G. Lo Bianco for providing us with the results of their in-beam gamma-ray experiments prior to publication.

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Schneider, E.W., Glascock, M.D., Walters, W.B. et al. Radioactive decay of 1.7-h149Nd to levels of transitional149Pm. Z Physik A 291, 77–86 (1979). https://doi.org/10.1007/BF01415819

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  • DOI: https://doi.org/10.1007/BF01415819

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