Spontaneous C14 emission from Ra223

W. Kutschera, I. Ahmad, S. G. Armato, III, A. M. Friedman, J. E. Gindler, W. Henning, T. Ishii, M. Paul, and K. E. Rehm
Phys. Rev. C 32, 2036 – Published 1 December 1985
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Abstract

The spontaneous emission of C14 from Ra223, recently discovered by Rose and Jones, has been confirmed, and the mass of the emitted particles unambiguously identified. The present measurement was performed with a Th227 source containing 9.2 mCi of Ra223. An Enge split-pole magnetic spectrograph was used to suppress the intense alpha radiation and to identify the C14 particles. The spectrograph was calibrated with tandem-accelerated beams of C14, C13, and C12. In six days of decay counting, twenty-four C14 events were observed yielding a branching ratio of (4.7±1.3)×1010 for the emission of C14 from Ra223 relative to that of alpha particles. The value is in fair agreement with the result of Rose and Jones, (8.5±2.5)×1010, and with more recent measurements from other laboratories.

  • Received 20 February 1985

DOI:https://doi.org/10.1103/PhysRevC.32.2036

©1985 American Physical Society

Authors & Affiliations

W. Kutschera, I. Ahmad, S. G. Armato, III, A. M. Friedman, J. E. Gindler, W. Henning, T. Ishii, M. Paul, and K. E. Rehm

  • Argonne National Laboratory, Argonne, Illinois 60439

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Issue

Vol. 32, Iss. 6 — December 1985

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