Fermion mass and the pressure of dense matter

We consider a simple toy model to study the effects of finite fermion masses on the pressure of cold and dense matter, with possible applications in the physics of condensates in the core of neutron stars and color superconductivity.Comment: 3 pages, 2 figures. Presented at Quark Confinement and the Hadron Spectrum 7, Ponta Delgada, Azores, Portugal, 2-7 Sep 200

Small Size, Low Cost Multichannel Analyzer Based on an SDK 85 with the A/D Conversion and Data Acquisition Functions Implemented by Software

We describe a small size low cost 128-256 channels multichannel analyser based on an SDK85 microcomputer board using a minimum of external low cost circuitry. This circuitry consists only of a quad comparator, three operational amplifiers and three integrated analog switches and very few discrete components. The pulse amplitude conversion is carried out fully by software. This software as well as that for data acquisition and output functions is described and results are presente

Modelling of an IR scintillation counter

A systematic study of the excitation and de-excitation mechanisms in ternary gas mixtures Ar+CO2+N2 is presented regarding the possibility of developing a proportional scintillation counter based on the detection of the infrared molecular emissions associated with the lowest vibrational states of molecules. The use of visible or near-infrared photons ([lambda]<1 [mu]m) for applications like imaging and quality control of microstructure detectors has been reported. In view of these applications we analyse the processes leading to near-infrared emissions in pure argon and give an estimation of the number of photons emitted per electron, at several pressures, as a function of the charge gain.http://www.sciencedirect.com/science/article/B6TJM-3YXB101-2M/1/b5bfeb3739389bb6dbe4d84c8746dbf