Suppose the electron is initially in a state k. When the field has acted on the electron for a small time dt, it has gained an energy: [13]dE=eFvdt=(eF/ħ)(dE/dk)dt since the group velocity of the de Broglie wave (energy, E = ħω) is v = ħ−1 (dE/dk). Or ...
In subject area: Chemistry Electron impact mass spectrometry (EI-MS) involves the bombardment of the vaporized metabolite by high-energy electrons (0–100eV), producing a molecular radical cation (M+·) having a mass equivalent to the molecular weight of the compound. ...
Energy spectrum and mass composition of primary cosmic rays at energies 1015–1018 eV Data on muon and electron components of extensive air showers (EAS) (obtained with the EAS MSU array) were used to derive the primary cosmic ray (PCR) mass... NN Kalmykov,GV Kulikov,VP Sulakov,... - ...
Tuning Effect in the Recent Data on Nuclear Binding Energies. We consider relations in parameters of the Standard Model including the scaling factors similar to the QED radiative correction (α/2π) for the electron m... Sukhoruchkin,S.,I. - 《Aip Conference Proceedings》 被引量: 1发表: ...
We, thus, increased theβ-electron-to-background ratio by a factor of 2.7 with respect to the first campaign. In the last 40 eV of the integral spectrum, we collected a total number of 3.7 × 106 β-electrons. Figure2acompares the spectra of both neutrino-mass campaigns. A ...
In this lecture recent experiments to measure the mass of the electron neutrino from tritium β-decay are reviewed. For such measurements an accurate knowledge of the spectrometer resolution function, the energy loss in the tritium source, the distribution of the final electronic states, etc. is ...
A variety of ion interactions have been studied for the purpose of ion dissociation and ion transformation, including ion/neutral, ion/photon, ion/electron, and ion/ion interactions. A wide range of phenomena have been observed, many of which have been explored/developed as means for structural...
The mass spectral properties of 3,5- and 4,5-dicaffeoylquinic acids (DCQAs) and selected derivatives were examined using electron ionization (EI), fast atom bombardment (FAB) and electrospray ionization (ESI). EI analysis of the trimethylsilyl derivatives provides molecular mass (Mr) information,...
Electron impact and hyperthermal surface ionization mass spectrometry in supersonic molecular beams Supersonic molecular beams (SMB) are characterized by unidirectional motion in space, hyperthermal kinetic energy of up to 30 eV, supercooling of the molec... A Amirav - 《Journal of Mass Spectrometry...
It is shown that at low temperatures, small compared to the electron mass, the dominant thermal effect on the propagation of photons in a heat bath is a ch... R Tarrach - 《Physics Letters B》 被引量: 28发表: 1983年 Thermal relic abundance of the lightest Kaluza-Klein particle in phen...