Figure 3
From: High precision half-life measurement of the extinct radio-lanthanide Dysprosium-154
(a) α-spectra (black line) of the electrodeposited Dy on a graphite foil (SDD = 10.4 mm, counting time = 5∙105 s or 5.8 days). The histogram bin size is 5.925 keV. The presence of 148Gd, contained in traces in the Dy separated fraction (isotope ratio 154Dy:148Gd ≈ 28,000:1), is clearly visible. The model (navy line) that comprises the fit of the 154Dy peak (red line), the 148Gd peak (green line), as well as the electronic low energy noise, is shown. In addition, the background (light grey line) recorded during a period of 10 days (8.64∙105 s) is superimposed. (b) Fitting residuals. The residuals (orange line) are consistent with the Poisson counting statistics of the spectrum (1σ uncertainty, blue line).
