= Eduardo García-Toraño
{c}
Eduardo García-Toraño is a <physicist> whose work includes precision <measurements> of <radioactive decay>. His 2010 coauthored study of <fluorine-18> lists an affiliation with an <ionizing radiation> metrology laboratory in Madrid. The experiment followed <radioactive decay> using three systems: <ionization chambers>, <germanium detectors>, and <coincidence counting> with fast <scintillators>. Measurements extended over as many as nine <half-lives>, providing several instrumental routes to the same physical parameter.<The half-life of 18F by Eduardo García-Toraño and others>[Byline, affiliation and Abstract, Applied Radiation and Isotopes68(7–8),1561–1565(2010)]{ref}
The combined result was a <half-life> of \b[$1.82871(18)\,\mathrm h$], where the parenthetical notation represents $0.00018\,\mathrm h$ in the last quoted digits. This is the result reported by that experiment; the distinction matters when comparing a historical <measurement> with a later evaluated <half-life>.<The half-life of 18F by Eduardo García-Toraño and others>[Abstract: combined result from the three measuring systems]{ref}
A simple model illustrates why the long observation interval is demanding. Suppose a detector's observed event rate is
$$
R(t)=R_0e^{-\lambda t}+B,\qquad
t_{1/2}=\frac{\ln 2}{\lambda},
$$
where $\lambda$ is the <radioactive decay constant> and $B$ is a constant instrumental background. This illustrative model assumes stable detection efficiency and background. After nine <half-lives>, the decaying contribution is $R_0/512$. An initial contribution of $512$ events per second would therefore fall to just $1$ event per second: even a small background can then noticeably distort an <exponential decay> fit if it is omitted. Independent detector systems make a valuable comparison because their instrumental backgrounds and responses need not behave identically.
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