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Beta decay of12B and12N to the first excited state of12C (4.44 MeV)

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Zeitschrift für Physik A Atoms and Nuclei

Abstract

The branching ratios of the beta-decay of12B and12N to the 4.44 MeV state in12C were determined by (βγ-coincidences to be (1.182±0.019)% and (1.898±0.032)% of the total rate, resp. This givesft −=(1.407±0.023) · 105 s andft +=(1.406±0.024) · 105 s. For theft-asymmetryδ=(ft +/ft −)−1 the valueδ=−(1±14) · 10−3 was obtained. This is in contrast to other GT mirror transitions which show positiveδ of a few percent.

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Author notes

  1. W. Kaina

    Present address: AEG Ulm, FRG

  2. V. Soergel

    Present address: DESY Hamburg, FRG

  3. G. Zinser

    Present address: Deutsche Krebsforschungszentrum, Heidelberg, FRG

Authors and Affiliations

  1. Physikalisches Institut der Universität, Heidelberg, Federal Republic of Germany

    W. Kaina, V. Soergel, W. Trost & G. Zinser

Authors
  1. W. Kaina
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  2. V. Soergel
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  3. W. Trost
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  4. G. Zinser
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Additional information

Supported by Deutsche Forschungsgemeinschaft

The authors thank H.J. Maier and his team of the Technologische Labor at the University of München for preparation of the boron targets.

We also thank the Physikalisches Institut of the University of Freiburg for the possibility to carry out the experiment at its Van de Graaff and for the hospitality extended to us during the running periods.

Thanks finally go to F.J. Zickgraf who assisted during the experiment and its preparation.

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Kaina, W., Soergel, V., Trost, W. et al. Beta decay of12B and12N to the first excited state of12C (4.44 MeV). Z Physik A 301, 183–188 (1981). https://doi.org/10.1007/BF01419249

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  • DOI: https://doi.org/10.1007/BF01419249

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