We present 11 independent measurements of the half-life and spectral shape of the 4-fold forbidden beta decay of 113-Cd using CdZnTe semiconductors with a total combined lifetime of 6.58 kg days. Our overall result gives a half-life of (8.00 +/- 0.11(stat) +/- 0.24(sys)) x 10^15 years and a Q value of 322.2 +/- 0.3(stat) +/- 0.9(sys) keV. For the first time half-lives well beyond 10^10 years have been deduced with a statistically representative sample of independent measurements.
@article{arxiv.0901.0996,
title = {An Investigation into the 113-Cd Beta Decay Spectrum using a CdZnTe Array},
author = {J. V. Dawson and C. Reeve and J. R. Wilson and K. Zuber and M. Junker and C. Gössling and T. Köttig and D. Münstermann and S. Rajek and O. Schulz},
journal= {arXiv preprint arXiv:0901.0996},
year = {2009}
}
Comments
18 pages, 5 figures, accepted for publication in Nuclear Physics A