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

  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},
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%. 

Figures from this paper

Do radioactive half-lives vary with the Earth-to-Sun distance?
  • J. Hardy, J. Goodwin, V. Iacob
  • Physics, Chemistry
  • Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine
  • 2012
This work directly measures the half-life of (198)Au (t(1/2)=2.695 d) on seven occasions spread out in time to cover the complete range of Earth-Sun distances and can set an upper limit on their amplitude of ±0.02%. Expand
Nuclear Data Sheets for A = 198
Abstract The 2002 version of Nuclear Data Sheets for A = 198 (2002Zh04) has been updated and revised on the basis of the experimental results from various decay and reaction studies before June 2008.Expand
Evaluation of half-life of 198Au.
The half-life of the important radioisotope (198)Au is evaluated by using several different statistical methods, such as weighted mean (WM), limitation of statistical weights method (LWM), normalizedExpand
Limits on tensor-type weak currents from nuclear and neutron β decays
The limits on time-reversal invariant tensor-type weak currents from nuclear and neutron $\beta$ decays are evaluated including most recent experimental data. We find that $ -0.14 \times 10^{-2} <Expand
Accelerated Learning: Undergraduate Research Experiences at the Texas A&M Cyclotron Institute
Abstract The Texas A&M Cyclotron Institute (TAMU CI) has had an NSF funded Research Experiences for Undergraduates program since 2004. Each summer about a dozen students from across the country joinExpand


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
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
  • Phys. J. A 34, 271
  • 2007
  • Phys. J. A 31, 203
  • 2007
  • Instrum. Methods Phys. Res. A 389, 81
  • 1997
  • Rev. C 80, 045501
  • 2009
  • Rev. C 79, 055502
  • 2009
  • Rev. C 77, 065502 (2008); 78, 039901(E)
  • 2008
  • Rev. B 75, 205125
  • 2007
  • 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