A monolayer tritium source is described. It consists of tritiated hydrocarbon chains covalently bonded onto a surface and has a well-defined structure. The energy loss in the source is very small. Measurements of the backscattering probability and the spectrometer resolution are reported. A first ...
closed tritium cycletritium analyticsBIXSAmong the most important questions in fundamental physics and cosmology are the origin and the masses of fundamental particles, in particular the neutrino masses. KATRIN will allow a model-independent measurement of the neutrino mass scale with an expected ...
The tritium activity was implanted into a thin layer of carbon. The mass determined is consistent with zero with an upper limit of 18 eV, which includes instrumental and statistical uncertainties due to the energy loss in the source and the final electronic states....
Reznik [111, 112] found that satellite cells are more numerous in areas undergoing regeneration and that these cells incorporate tritium-labeled thymidine. He considered them "stem cells" capable of providing my- oblasts for the mature mammal and for regeneration of skeletal muscle tissue. lJi...
The fusion fuel reserves in the form of deuterium, the heavy isotope of hydrogen with an isotopic abundance of 0.015%, are estimated to be about 1010Q, many orders of magnitude larger than those of either fossil or fission fuels, and since the only radioactive product is tritium which is ...
The beta-decay energy spectrum which results from the decay of one of the nuclei in the T2 molecule has been computed. An accurate, explicitly correlated basis set was used to describe electronic states of both the parent and the daughter molecules, and effects of nuclear motion have been take...
An atom is considered as the smallest particle of a chemical element that is existing in nature. All substances are made up of either neutral atoms or ionized atoms. The atoms of all elements have three subatomic particles i.e., electrons, protons, and neutrons....
Results of last years measurements of end point region of tritium spectrum on the "Troitsk 谓-mass" s... V.M. Lobashev - 《Progress in Particle & Nuclear Physics》 被引量: 51发表: 2002年 Measurement of the Beta Energy Spectrum of $^{3}$H to Determine the Anti-neutrino Mass An ...
We report the most sensitive upper limit set on the mass of the electron antineutrino. The upper limit of 9.4 eV (95% confidence level) was obtained from a study of the shape of the beta decay spectrum of free molecular tritium. Achieving such a level of sensitivity required precise determin...
TritiumAnalysis of changes in the vertical distribution of tritium in the Caspian Sea water mass in 1994–1996 led to a conclusion that the sea level fall that started in 1996 was accompanied by a rearrangement of the water mass steady hydrological structure characteristic of the high sea-level ...