J. Paepen

TL;DR: In this article, an alternative data analysis method is applied that leads to a more realistic uncertainty budget, and the uncertainty components are being subdivided in three categories according to the relative frequency at which they occur, an appropriate uncertainty propagation formula applied and then the total uncertainty obtained from an independent sum.

TL;DR: A cubic EJ-309 liquid scintillator of 10 cm width has been characterized for its response to γ -rays and neutrons in this article, where the light output and resolution functions for electrons and protons were derived by a least squares adjustment to experimental data using theoretical response functions determined with Monte Carlo simulations.

TL;DR: There is no indication of a natural impediment against sub-permille accuracy in half-life determinations, renormalisation of activity to a distant reference date, application of nuclear dating for archaeology, geo- and cosmochronology, nor in establishing the SI unit becquerel and seeking international equivalence of activity standards.

TL;DR: The (225)Ac half-life was determined by measuring the activity of ( 225)Ac sources as a function of time, using various detection techniques: α-particle counting with a planar silicon detector at a defined small solid angle and in a nearly-2π geometry.

TL;DR: The most stable activity measurements of alpha decaying sources set an upper limit between 0.0006% and 0.006% to the amplitude of annual oscillations in the decay rate.