منابع مشابه
Primary Radicals Production from Water Fragmentation by Heavy Ions
The importance of fragmentation of water molecules by heavy ions is discussed for several different physical environments, including tumor treatment, planetary sciences and fission reactors. The characteristics of the fragmentation yields by electrons, protons and photons are presented and compared with fragmentation yields of water molecules by C3+ and O5+ ions at energies corresponding to the...
متن کاملFragmentation of Very High Energy Heavy Ions
We present experimental results on fragmentation charge-changing cross sections of 158 A GeV lead ions (charge Z = 82e) incident on Cu and CR39 targets. To detect and identify the relativistic ions, the nuclear track detector CR39 was used. When an ion crosses a nuclear track detector foil, it produces damages at the level of molecular bonds, forming the so called “latent track”. During the che...
متن کاملDirect measurements of DNA fragmentation induced by heavy ions
Unrepaired double-strand breaks (DSB) in the sugarphosphate backbone of the DNA molecule resulting from exposure of cells to ionising radiation are believed to be critical lesions that can lead to cell killing, mutation and carcinogenesis. Moreover, the pattern of DNA fragmentation is directly related to radiation track structure and, in the case of high-LET radiation, becomes determined by the...
متن کاملDetection of trace heavy metal ions in water by nanostructured porous Si biosensors.
A generic biosensing platform, based on nanostructured porous Si (PSi), Fabry-Pérot thin films, for label-free monitoring of heavy metal ions in aqueous solutions by enzymatic activity inhibition, is described. First, we show a general detection assay by immobilizing horseradish peroxidase (HRP) within the oxidized PSi nanostructure and monitor its catalytic activity in real time by reflective ...
متن کاملHeavy-Quark Fragmentation
We study perturbative and non-perturbative aspects of heavy-quark fragmentation into hadrons, emphasizing the large-x region, where x is the energy fraction of the detected hadron. We first prove that when the moment index N and the quark mass m get large simultaneously with the ratio NΛ/m fixed, the fragmentation function depends on this ratio alone. This opens up the way to formulate the non-...
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ژورنال
عنوان ژورنال: Journal of Physics: Conference Series
سال: 2009
ISSN: 1742-6596
DOI: 10.1088/1742-6596/194/1/012049