Results 251 to 260 of about 117,477 (313)
Some of the next articles are maybe not open access.
The Clustering of Ions in Irradiated Gases
Radiation Research, 1959The general theory of the clustering of ions in irradiated gases is considered. A systematic comparison of theory with experiment is impossible due to lack of data, however a limited comparison is made, and a brief consideration of the effects of clustering on the radiation chemistry of gases is given. (J.R.D.)
J L, MAGEE, K, FUNABASHI
openaire +2 more sources
Ion irradiation effects in diamond
Surface and Coatings Technology, 1990Abstract Diamond has long been regarded as relatively resistant to radiation, although it does undergo structural damage when bombarded by neutrons or ions. Diamond powders have been irradiated by various noble gas ions at 1–3 MeV energy and X-ray diffraction studies have shown that the lattice expansion of ion-irradiated diamond saturates with ...
M.S. WONG, F.G. KARIORIS, L. CARTZ
openaire +1 more source
Advances in Space Research, 1993
Abstract We report new results from recent experimental studies on physico-chemical effects induced in frozen gases and mixtures (CO, CO2, CH4, H2O and SO2) simulating ice targets in space (frosts on external planets and satellites, and comets). In particular we have studied, by UV-Vis-IR spectroscopy, the formation of new molecules, the alteration ...
G. Strazzulla, G. Leto, M.E. Palumbo
openaire +1 more source
Abstract We report new results from recent experimental studies on physico-chemical effects induced in frozen gases and mixtures (CO, CO2, CH4, H2O and SO2) simulating ice targets in space (frosts on external planets and satellites, and comets). In particular we have studied, by UV-Vis-IR spectroscopy, the formation of new molecules, the alteration ...
G. Strazzulla, G. Leto, M.E. Palumbo
openaire +1 more source
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1991
Abstract The keV-MeV ion irradiation of polymers produces deep changes in their physical and chemical properties associated with the breaking and rearrangement of original bonds. The modification of chain structure occurs within a well defined ion fluence range which depends on the ion linear energy transfer as well as on the target parameters.
L. Calcagno, G. Foti
openaire +1 more source
Abstract The keV-MeV ion irradiation of polymers produces deep changes in their physical and chemical properties associated with the breaking and rearrangement of original bonds. The modification of chain structure occurs within a well defined ion fluence range which depends on the ion linear energy transfer as well as on the target parameters.
L. Calcagno, G. Foti
openaire +1 more source
Optical constants in ion-irradiated graphite
Surface and Coatings Technology, 1994Abstract The ion-beam-induced amorphization of crystalline graphite layers was studied by using near-IR visible and near-UV reflectance spectra to obtain the real and imaginary parts of the refractive index as a function of photon energy in the range 0.5–7 eV.
COMPAGNINI, Giuseppe Romano, FOTI G.
openaire +2 more sources
Heavy Ion Irradiation of HeLa Cells
Radiation Research, 1962>HeLa cells were irradiated with 250-kvp x rays, 40-Mev alpha panticles (+2), 69-Mev lithium ions (+3), 105-Mev carbon ions (+6), and 130-Mev oxygen ions (+8). The x rays, alpha particles, and lithium ions gave multitarget-type survival curves showing thresholds at low dose.
R A, DEERING, R, RICE
openaire +2 more sources
Ion irradiation effects in silicon nanowires
MRS Proceedings, 2011ABSTRACTIon irradiation effects in nanowires are of increasing interest due to potential applications of the wires as e.g. current-carrying elements in transistors or as efficient light emitters. Although several experiments have already demonstrated such functionalities, very few theoretical studies on the fundamental mechanisms of ion irradiation ...
Holmström Eero Kristian +2 more
openaire +1 more source
Structure and bonding in ion irradiated polystyrene
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990Abstract In this paper we report the Raman spectra of polystyrene films irradiated with 240 keV Ar+ ions at fluences between 1015 and 4 × 1016 cm−2. The presence of two broad bands ID, and IG at 1380 and 1560 cm−1 clearly indicates that ion bombardment induces a transition from the original molecular solid to hydrogenated amorphous carbon.
FOTI, G, REITANO, Riccardo
openaire +2 more sources
Increases in giant magnetoresistance by ion irradiation
Physical Review B, 1994We have studied the effect of 500-keV Xe[sup +] irradiation on the structure, magnetotransport, and magnetic properties of sputtered Fe/Cr multilayers. Initially, with increasing dosage the giant magnetoresistance (GMR) increases with a concomitant increase in the interfacial roughness as indicated by changes in the low-angle x-ray-diffraction spectra.
, Kelly +7 more
openaire +2 more sources
Tailoring magnetism by light-ion irradiation
Journal of Physics D: Applied Physics, 2004Owing to their reduced dimensions, the magnetic properties of ultrathin magnetic films and multilayers, e.g. magnetic anisotropies and exchange coupling, often depend strongly on the surface and interface structure. In addition, chemical composition, crystallinity, grain sizes and their distribution govern the magnetic behaviour.
Fassbender, J. +2 more
openaire +2 more sources