Navegação Ciências Exatas e da Terra por Assunto "Prótons"
Resultados 1-13 de 13
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Constraining the free parameter of the high parton density effects
(2000) [Artigo de periódico]The high parton density effects are strongly dependent of the spatial gluon distribution within the proton, with radius R, which cannot be derived from perturbative QCD. In this paper we assume that the unitarity corrections ... -
Effective polarization in quasi-free scattering
(1980) [Artigo de periódico]A simple relation, involving only experimental quantmes, for the effective polarizations m quasi-free (p, 2p) scattering on closed shell nuclei IS tested for recent TRIUMF (p, 2p) experiments with 200 MeV polanzed protons. -
Electrical isolation of a silicon [Delta]-doped layer in GaAs by ion irradiation
(1999) [Artigo de periódico]The electrical isolation of a n-type d -doped layer embedded into undoped GaAs was studied using proton or helium ion bombardment. The threshold dose for isolation Dth of the d -doped layer was found to be '2 times higher ... -
Electrical isolation of n-type GaAs layers by proton bombardment : effects of the irration temperature
(1998) [Artigo de periódico]The electrical isolation in n-type GaAs layers produced by proton irradiation at temperatures from 2100 to 300°C was investigated. The threshold dose for the isolation (Dth) was found almost identical for irradiation at ... -
Ground- and excited-state scattering potentials for the stopping of protons in an electron gas
(2019) [Artigo de periódico]The self-consistent electron–ion potential V(r) is calculated for H+ ions in an electron gas system as a function of the projectile energy to model the electronic stopping power for conduction-band electrons. The results ... -
Investigation of medium and heavy nuclei by quasi-free-proton scattering
(1960) [Artigo de periódico] -
Measurement of exclusive ρ(770)0 photoproduction in ultraperipheral pPb collisions at √sNN=5.02 TeV
(2019) [Artigo de periódico]Exclusive ρ(770)0 photoproduction is measured for the first time in ultraperipheral pPb collisions at √sNN=5.02 TeV with the CMS detector. The cross section σ(γp→ρ(770)0p) is 11.0±1.4(stat)±1.0(syst) μb at [Wγp]=92.6GeV ... -
Measuring large-scale structure with quasars in narrow-band filter surveys
(2012) [Artigo de periódico] -
Probing the spin-orbit coupling of nuclear protons
(1973) [Artigo de periódico]The strong absorption in quasi-free scattering opens a possibility of measuring the spin-orbit coupling of nuclear protons. Cross sections for polarized incoming protons are expected to exhibit pronounced asymmetries, with ... -
Proton spin-lattice relaxation in TMMC [(ch/Sub 3/)/Sub 4/Nmncl/Sub 3/]
(1974) [Artigo de periódico]We examine the temperature and frequency dependence of the proton spin-1attice re1axation rate 1/T 1, as a probe of the electron-spin dynamics of the quasi-one-dimensional exchange-coupled paramagnet TMMC [(CH3) 4NMnC1J. ... -
QCD evolution and skewedness effects in color dipole description of DVCS
(2004) [Artigo de periódico]We show the role played by QCD evolution and skewedness effects in the DVCS cross section at large Q2 within the color dipole description of the process at photon level. The dipole cross section is given by the saturation ... -
Theoretical study of the line profiles of the hydrogen perturbed by collisions with protons
(2012) [Artigo de periódico] -
Unified line profiles for hydrogen perturbed by collisions with protons : satellites and asymmetries
(2015) [Artigo de periódico]We present new calculations of unified line profiles for hydrogen perturbed by collisions with protons. We report on new calculations of the potential energies and dipole moments which allow the evaluation of profiles for ...