Silicon photomultipliers (SiPMs) have recently emerged as a replacement for photomultiplier tubes (PMTs) light detection in many applications, including high-energy physics and medical imaging. Recently, detailed Monte Carlo simulation of SiPMs has been implemented GATE to quantify the impact SiPM specifications on linearity, energy time resolution scintillation crystal read by SiPM. In this pa...

The diffusion of 22Na and 195Au has been investigated in solid, isotopically pure 8Li and 7Li metal. The Na tracer has been found to diffuse by about 4% faster in 8Li than in 7Li. For Au the corresponding difference was 4% at the melting point, but as much as about 15% at § Tm (°K). A formalism is given for the interpretation of diffusion experiments where the matrix isotope mass is varied. The...

to differentiation of the spermatozoon to the mature motile condition. During differentiation, striking variations occur not only in cell shape but also in the ionic composition of the developing spermatozoa and their surrounding media, specifically in the ratio of sodium to potassium (Cragle, Salisbury & Muntz, 1958). The membrane potential (Em) of cells isolated from mouse testis is dependent...