Results 241 to 250 of about 116,364 (295)

Ion beam irradiation of polymers

AIP Conference Proceedings, 1996
Mylar and kapton films were irradiated with H+ (2.5 Mev) or C4+ (12.5 Mev) beams, at doses up to 1.99×1016 H+/cm2 and 2.48×1015 C4+/cm2. Analysis of scattered projectiles simultaneously to irradiation has allowed discerning and following several changes undergone by the films, such as loss of elements, density changes, compaction and movement of ...
Saúl Romero H., Ghiraldo Murillo O., Rafael Policroniades R., Marco Fernández B., Jorge Fernández A., Octavio Alvarez F.   +5 more
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Optical applications of ion beam irradiation

Vacuum, 2000
Abstract Layers of various metals (M) buried in Si, SiO 2 or Al 2 O 3 were irradiated with various fluences of heavy MeV ions in order to obtain either silicides or nanometric particles that are expected to exhibit interesting optical properties. The mixing of noble metals, Fe and Er with these matrices proceeds either via isotropic diffusion in ...
J. C. PIVIN, D. DIMOVAMALINOVSKA, M. SENDOVAVASSILEVA, M. NIKOLAEVA, MARTUCCI, ALESSANDRO   +4 more
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Pulsed ion beam irradiation of silicon

Nuclear Instruments and Methods in Physics Research, 1982
Abstract The effects of intense pulsed H + , B + and Ba + beam irradiation of single crystal Si and of ion implantation damaged Si have been studied by spreading resistance measurement, backscattering and channeling, and TEM. This paper reports the measurements and their correlation.
W.K. Chu, S.R. Mader, E.F. Gorey, J.E.E. Baglin, R.T. Hodgson, J.M. Neri, D.A. Hammer   +6 more
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Hydrogenated amorphous carbon synthesis by ion beam irradiation

Applied Surface Science, 1989
keV ion beam irradiation at high fluence of polystyrene produces carbon films with interesting optical, electrical and mechanical properties. Very hard films with a very low energy gap of 0.6 eV or less are easily obtained with 250 keV argon beams at 1016 ions/cm2.
COMPAGNINI, Giuseppe Romano, REITANO, Riccardo, CALCAGNO, Lucia, MARLETTA, Giovanni, FOTI G.   +4 more
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Ion beam irradiation of relaxed amorphous silicon carbide

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1999
Abstract In-situ transmittance measurements at λ =633 nm are used during ion irradiation to probe the defect generation in relaxed amorphous silicon carbide (SiC). The optical constants of amorphous SiC are strongly correlated to the thermal history of the material and the transmittance of ion implanted amorphous SiC (unrelaxed amorphous) increases ...
CALCAGNO, Lucia, MUSUMECI, Paolo, GRIMALDI, Maria Grazia   +2 more
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Ion-beam and electron-beam irradiation of synthetic britholite

Journal of Nuclear Materials, 2003
Abstract Britholite, ideally Ca4−xREE6+x(SiO4)6O2 (REE=rare earth elements), has the hexagonal structure of apatite, a candidate waste form for actinides. Two synthetic britholites: Ca3.05Ce2.38Fe0.25Gd5.37Si4.88O26 (N56) and Ca3.78La0.95Ce1.45Zr0.78Fe0.14Nd2.15Eu0.50Si6.02O26 (N88) (P63; Z=1) were irradiated with 1.0 MeV Kr2+ and 1.5 MeV Xe+ over ...
S. Utsunomiya, S. Yudintsev, L.M. Wang, R.C. Ewing   +3 more
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Ion-Beam Irradiated Metallic Systems

1999
The interaction of energetic ion bems with solid targets has been studied for some decades. It is now well established that two independent processes contribute to the stopping power, S =·dE/N∙dx, the energy loss dE of an ion crossing a layer dx thick of a solid having N atoms per volume unit: (i) S e , the electronic stopping, due to electronic ...
G. Principi, A. Gupta
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Nano-fabricated cdw by ion-beam irradiation

Synthetic Metals, 1999
We propose a new technique of nano size CDW formation by applying two types of accurately controlled ion-beams to one dimensional bulk conductor. The CDW sample has 400 A thickness and 1000 A width. As a result of our investigation, we have found that the nano-fabricated CDW shows collective sliding and negative resistance above some threshold electric
T. Sumita, T. Nagai, H. Kubota, T. Matsukawa, I. Ohdomari   +4 more
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Patterning magnetic films by ion beam irradiation

Journal of Applied Physics, 2000
We have used ion beam irradiation through a silicon stencil mask to alter the magnetic properties of Co/Pt multilayer and FePt chemically-ordered superlattice films. In both systems, ion irradiation disorders the as-grown films which results in a reduction of the magnetic anisotropy.
B. D. Terris, D. Weller, L. Folks, J. E. E. Baglin, A. J. Kellock, H. Rothuizen, P. Vettiger   +6 more
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Infrared analysis of ion beam irradiated polymers

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
Abstract Irradiation with heavy ions can produce several modifications in the chain structure of polymers. These modifications can be related to scissioning and cross-linking of chemical bonds, which depend on the ion fluence and the density of energy deposited in the material. Stacked thin film Makrofol-KG® samples were irradiated with 350 MeV Au26+
A.O. Delgado, M.A. Rizzutto, M.H. Tabacniks, N. Added, D. Fink   +4 more
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