Results 261 to 270 of about 298,748 (284)

Atom transport under ion irradiation

Journal of Nuclear Materials, 1997
Abstract Diffusion coefficients in nickel single crystals under heavy ion irradiation were measured near the irradiated surface by using multi-layer specimens. Analysis of the depth dependence of these diffusion coefficients yields information on the effective fraction η of the displacement rate, with which transporting, i.e., ‘freely migrating ...
P. Fielitz, M.-P. Macht, V. Naundorf, H. Wollenberger   +3 more
openaire   +1 more source

Primary radical ions in irradiated carbonates

Physical Chemistry Chemical Physics
The decomposition of primary radical cations in irradiated carbonates via proton transfer is thermodynamically favorable but kinetically hindered.
Irina S. Tretyakova, Vsevolod I. Borovkov   +1 more
openaire   +2 more sources

Nanoindentation on ion irradiated steels

Journal of Nuclear Materials, 2009
Radiation induced mechanical property changes can cause major difficulties in designing systems operating in a radiation environment. Investigating these mechanical property changes in an irradiation environment is a costly and time consuming activity.
P. Hosemann, C. Vieh, R.R. Greco, S. Kabra, J.A. Valdez, M.J. Cappiello, S.A. Maloy   +6 more
openaire   +1 more source

Ion Irradiation of Ternary Pyrochlores

MRS Proceedings, 2008
AbstractSynthetic pyrochlore samples Y2Ti2-xSnxO7 (x=0.4, 0.8, 1.2, 1.6), Nd2Zr2O7, Nd2Zr1.2Ti0.8O7, and La1.6Y0.4Hf2O7, were irradiated in-situ using the IVEM-TANDEM microscope facility at the Argonne National Laboratory. The critical temperatures for amorphisation have revealed a dramatic increase in tolerance with increasing Sn content for the Y2Ti2-
Karl R. Whittle, Katherine L. Smith, Mark G. Blackford, Simon A.T. Redfern, Elizabeth J. Harvey, Nestor J. Zaluzec, Gregory R. Lumpkin   +6 more
openaire   +1 more source

Ion irradiation of carbon fibres

12th International Conference on High-Power Particle Beams. BEAMS'98. Proceedings (Cat. No.98EX103), 2002
The aim of the present work is to study changes of surface and volume physico-chemical properties of carbon fibres after ion irradiation. Ion irradiation of a foreign species can lead to the production of new compounds in near-surface layers of carbon fibre, but the displacement damage caused by energetic ions also lead to structural transitions of the
N.V. Gavrilov, D.R. Emlin, A.E. Ligachev, G.A. Mesyats, S. Ligacheva, A. Galyaeva   +5 more
openaire   +1 more source

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
openaire   +1 more source

Fullerene ion irradiation to silicon

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Abstract Silicon has been irradiated by singly charged C60 fullerene ions with an ion dose of up to 1 × 1013 ions/cm2 at room temperature in order to study the damage formation of cluster ion bombardment on solid surfaces. Singly and doubly charged fullerene ions and some daughter ions of fullerene were observed. Mass separation was accomplished by a
M. Tanomura, D. Takeuchi, J. Matsuo, G.H. Takaoka, I. Yamada   +4 more
openaire   +1 more source

Ion irradiation of astrophysical ices

Planetary and Space Science, 1995
We report recent experimental studies on the physical—chemical effects induced by fast ions colliding with frozen gases (CO. CH3OH, CH4, CO2) and mixtures with water simulating icy targets in space (frosts on external planets and satellites. comets and interstellar ices). We have studied, by lR spectroscopy, the formation of new molecules.
G. Strazzulla, A.C. Castorina, M.E. Palumbo   +2 more
openaire   +1 more source

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
openaire   +1 more source

Swift Heavy Ion Irradiation

2022
Parmod Kumar, Jitendra Pal Singh, Vinod Kumar, K. Asokan   +3 more
openaire   +1 more source