نتایج جستجو برای: impact ionisation

تعداد نتایج: 762857  

Journal: :Journal of Physics B 2022

Abstract Cyanoacetylene (HC 3 N) is an important trace species in the atmosphere of Titan. We report, for first time, absolute partial electron ionisation cross sections and precursor-specific cyanoacetylene, following experimental computational investigation. Our methodology involves using 2D ion-ion coincidence mass spectrometry to generate relative sections, over energy range 50 – 200 eV. Th...

Journal: :Nature 1904

2015

Mass Spectrometry and Proteomics The above definition presents a challenge to modern mass spectrometry, as the proteome of a cell is not constant, but rather is regulated dynamically. For example, different proteins with different numbers of copies are present during the different stages of cell development, differentiation and proliferation, as well as in the individual subcellular processes. ...

1998
Petra Hüntemeyer Alexander Oh Wolfram Zeuner

The charge collection properties of CVD diamond have been investigated with ionising radiation. In this study two CVD diamond samples, prepared with electrical contacts have been used as solid state ionisation chambers. The diamonds have been studied with beta particles and 10 keV photons, providing a homogeneous ionisation density and with protons and alpha particles which are absorbed in a th...

2012
David J. Hall Andrew Holland Matthew Soman

When considering the ‘standard’ gamma-camera, one might picture an array of photo-multiplier tubes or a similar array of small-area detectors. This array of imaging detectors would be attached to a corresponding array of scintillator modules (or a solid layer of scintillator) in order to give a high detection efficiency in the energy region of interest, usually 8-140 keV. Over recent years, dev...

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