Measurement of the half-life of $^{198}Au$ in a non-metal: High-precision measurement shows no host-material dependence

@article{Goodwin2010MeasurementOT,
  title={Measurement of the half-life of \$^\{198\}Au\$ in a non-metal: High-precision measurement shows no host-material dependence},
  author={J. R. Goodwin and Ninel Nica and V.E. Iacob and A. Dibidad and J. C. Hardy},
  journal={Physical Review C},
  year={2010},
  volume={82},
  pages={044320}
}
We have measured the half-life of the {beta}{sup -} decay of {sup 198}Au to be 2.6948(9) d, with the nuclide sited in an insulating environment. Comparing this result with the half-life we measured previously with a metallic environment, we find the half-lives in both environments to be the same within 0.04%, thus contradicting a prediction that screening from a ''plasma'' of quasifree electrons in a metal increases the half-life by as much as 7%. 

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References

SHOWING 1-10 OF 15 REFERENCES
Quantitative X-Ray Spectrometry
The interaction of X-rays with matter sources for the excitation of characteristic X-rays instrumentation statistics general computer applications and quantitative spectrum analysis as applied toExpand
APPL
Statistical packages have been used for decades to analyze large datasets or to perform mathematically intractable statistical methods. These packages are not capable of working with random variablesExpand
Eur
  • Phys. J. A 34, 271
  • 2007
Eur
  • Phys. J. A 31, 203
  • 2007
Nucl
  • Instrum. Methods Phys. Res. A 389, 81
  • 1997
Phys
  • Rev. C 80, 045501
  • 2009
Phys
  • Rev. C 79, 055502
  • 2009
Phys
  • Rev. C 77, 065502 (2008); 78, 039901(E)
  • 2008
Phys
  • Rev. B 75, 205125
  • 2007
A
  • D’Onofrio, Z. Fülöp, L. Gialanella, G. Gyürky, G. Imbriani, A. Jesus, J.P. Ribeiro, V. Roca, D. Rogalla, C. Rolfs, M. Romano, D. Schürmann, E. Somorjai, F. Strieder and F. Terrasi, Eur. Phys. J. A 28, 375
  • 2006
...
1
2
...