Results 221 to 230 of about 94,525 (268)
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Ion-chain interaction in keV ion-beam-irradiated polystyrene
Applied Physics Letters, 1987Molecular weight distribution has been measured in monodisperse polystyrene film (MW=9 000 amu) after ion bombardment, in the ion fluence range 1011–1013 ions/cm2. The chosen beams are 100 keV He, 200 keV Ne, and 400 keV Ar. The experimental data have been interpreted in terms of a simple statistical model for cross-links.
CALCAGNO, Lucia +3 more
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Ion Irradiation of Preceramic Polymer Thin Films
Journal of the American Ceramic Society, 1996Thin films of two preceramic polymers, namely polycarbosilane (PCS) and a silicone resin (SR350), were deposited on Si substrates. Instead of employing conventional annealing at high temperatures in an inert atmosphere, ion irradiation was used to achieve the polymer‐to‐ceramic conversion.
J. C. PIVIN +2 more
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Physica Status Solidi (a), 1983
The dislocation loop damage structures generated by low dose (≦ 5 × 1016 ions m−2) 80 keV Xe++ ion irradiations of α-Fe at room temperature and 77 K are studied by transmission electron microscopy, b = a/2〈111〉 loops are observed for each irradiation condition whereas b = a〈100〉 loops are not observed after irradiation at 77 K and are only observed at ...
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The dislocation loop damage structures generated by low dose (≦ 5 × 1016 ions m−2) 80 keV Xe++ ion irradiations of α-Fe at room temperature and 77 K are studied by transmission electron microscopy, b = a/2〈111〉 loops are observed for each irradiation condition whereas b = a〈100〉 loops are not observed after irradiation at 77 K and are only observed at ...
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Irradiation Effects in Ices by Energetic Ions
1989It has been shown that the irradiation of ices leads to “giant” erosion yields, in some specific conditions (1,2). In order to understand the physical processes involved, we have performed direct in-situ measurements of the erosion during irradiation, by means of infrared spectrometry of the ices.
Benit, J., Bibring, J.P., Rocard, F.
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Online monitor of heavy ion flux in an ion irradiation apparatus for semiconductor irradiation test
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2008Abstract An online monitor of heavy ion flux for semiconductor irradiation test was developed and tested. The monitor consists of four annular-shaped segmented secondary electron emission monitors (S-SEMs) arranged in a quadrature around the central area of a beam line.
Takahiro Makino +3 more
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Nanoindentation on ion irradiated steels
Journal of Nuclear Materials, 2009Radiation 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 +6 more
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Challenges to the use of ion irradiation for emulating reactor irradiation
Journal of Materials Research, 2015Abstract
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Ion beam irradiation of polymers
AIP Conference Proceedings, 1996Mylar 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. +5 more
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Fullerene ion irradiation to silicon
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997Abstract 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 +4 more
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Ion irradiation of astrophysical ices
Planetary and Space Science, 1995We 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 +2 more
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