Heavy Ions Physics Research Papers (original) (raw)

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- by and +1
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- High Energy Physics, Heavy Ions Physics, Energy Use, Cross Section
- by Michael P Kramer
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- Algorithms, Magnetic Resonance Imaging, Radiation Therapy, Quality Assurance
- by Sven Geier and +1
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- Mechanical Engineering, Aerospace Engineering, Space, Heavy Ions Physics
- by Cary Zeitlin
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- Mechanical Engineering, Aerospace Engineering, Radiation Protection, Space
- by A. Dainelli
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- Heavy Ions Physics, Conceptual Design, Low Energy Buildngs, Ion Beam
- by Achilleas Mavrellis
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- Engineering, Molecular Physics, Organic Chemistry, Chemical Physics
- by Makoto Adachi
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- Radiation, Carbon, DNA repair, Telomerase
- by H. Hora
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- Physics, Laser produced plasma, Heavy Ions Physics, Physical sciences
- by Dongpo Fu
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- Geochemistry, Heavy Ions Physics, Interdisciplinary Engineering
- by Zoran Kahric
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- RADIATION DAMAGE, Radiation Effects, Heavy Ions Physics, Dc-Dc Boost Converter
- by Eugene Normand
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- Biomedical Engineering, Heavy Ions Physics, Solar Flare
- by Alba Zanini
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- Radiation Protection, Biological Sciences, Space flight, Heavy Ions Physics
- by Chennupati Jagadish and +1
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- Geochemistry, Atomic Force Microscopy, Heavy Ions Physics, Dislocations
- by L. Calabretta and +2
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- Heavy Ions Physics
- by M. Steck
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- Geochemistry, Heavy Ions Physics, Laser Induced Fluorescence, Spectrum
- by Guillaume Hubert
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- Biomedical Engineering, Monte Carlo, Heavy Ions Physics, Silicon on Insulator
- by fatima martinez
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- Engineering, High Pressure, Numerical Analysis, Near Infrared
- by Jamie Laird
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- Geochemistry, Heavy Ions Physics, Data Collection, Interdisciplinary Engineering

Allelic loss is an important mutational mechanism in human carcinogenesis. Loss of heterozygosity (LOH) at an autosomal locus is one outcome of the repair of DNA double-strand breaks (DSBs) and can occur by deletion or by mitotic recombination. We report that mitotic recombination between homologous chromosomes occurred in human lymphoid cells exposed to densely ionizing radiation. We used cells derived from the same donor that express either normal TP53 (TK6 cells) or homozygous mutant TP53 (WTK1 cells) to assess the influence of TP53 on radiation-induced mutagenesis. Expression of mutant TP53 (Met 237 Ile) was associated with a small increase in mutation frequencies at the hemizygous HPRT (hypoxanthine phosphoribosyl transferase) locus, but the mutation spectra were unaffected at this locus. In contrast, WTK1 cells (mutant TP53) were 30-fold more susceptible than TK6 cells (wild-type TP53) to radiation-induced mutagenesis at the TK1 (thymidine kinase) locus. Gene dosage analysis c...

- by Stacey Gauny
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- Cancer, DNA, Mitosis, Cell line
- by Eugene Normand
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- Biomedical Engineering, Space flight, Heavy Ions Physics, Nuclear science
- by C. Poivey
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- Heavy Ions Physics, Shape, Voltage, Transient Response

BARC has been exploring some of the unique features of silicon detector in a variety of nuclear structure experiment using high energy photons and heavy ions projectiles. Current experimental application makes use of large area silicon detector with depletion thickness of ~150-1000 mum. The low cost silicon detector shows excellent energy and position resolution. In this paper, we discuss the simulation result for silicon detector using SILVACO and the physical mechanism involved in detector operation and one set of mask designing for the silicon radiation detector then we will clarify how these effects set a limit to achievable timing performance.

- by Pawel Olko
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- Geology, Thermodynamics, Monte Carlo, Free Radical
- by Zoran Kahric
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- Radiation Effects, Heavy Ions Physics
- by Antonella Bertucci
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- Mechanical Engineering, Aerospace Engineering, Materials Science, Space
- by Steve Agnew and +1
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- Trace Metals, Magnetic field, Heavy Ions Physics, Waste Disposal
- by Eugene Normand and +1
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- Gastroenterology, Radiation Effects, Heavy Ions Physics, Radiation Effect
- by Jac Nickoloff
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- DNA damage, Gene expression, X Rays, Humans
- by Pietro Benedetto Molini
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- Heavy Ions Physics, Conceptual Design
- by Gregory L Comer and +1
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- Fluid Dynamics, Heavy Ions Physics, Classical Field Theory, Historic conservation law

Arik Posner,1 Nathan A. Schwadron, Thomas H. Zurbuchen, Janet U. Kozyra, Michael W. Liemohn, and George Gloeckler2 Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, USA Received 14 May 2001; revised 15 October... more

- by Arik Posner
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- Multidisciplinary, Heavy Ions Physics, Geophysical
- by Hiroshi Nakashima
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- Geology, Monte Carlo, Heavy Ions Physics, Radiation Measurements

We present a compendium of optocoupler radiation test data including data on neutron, proton and heavy ion displacement damage (DD), single event transients (SET) and degradation due to total ionizing dose (TID). Proton data includes... more

- by jerry wert
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- Damage Mechanics, Radiation Effects, Heavy Ions Physics
- by Remo Ruffini
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- Heavy Ions Physics, Spectral analysis, Gravitational Collapse, Space Time
- by A. Kponou
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- Heavy Ions Physics, Medical Linear Accelerator, Ion Beam
- by francis cucinotta
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- Radiation Protection, DNA damage, DNA repair, Disease susceptibility
- by R. Koga and +1
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- Biomedical Engineering, Heavy Ions Physics, Time Dependent, Ionizing Radiation
- by Kai Arstila
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- Geochemistry, Data Analysis, Monte Carlo, Ion Beam Analysis
- by Angelo Pagano
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- Heavy Ions Physics, Space Time, Relative Density, Cross Section

Using vibrating sample magnetometery (VSM) 50MeV Li3+ ion irradiation effects on magnetic properties of single crystals of SrGaxInyFe12−(x+ y) O19 (where x= 0, 5, 7, 9; y= 0, 0.8, 1.3, 1.0), are reported. The substitution of Ga and In in... more

- by Pattayil Joy
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- Mechanical Engineering, Condensed Matter Physics, Magnetism, Heavy Ions Physics
- by Eva Lindroth
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- Dust (Astronomy & Astrophysics), Heavy Ions Physics, Low Temperature, Ion Beam
- by Arnold Müller
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- Geochemistry, Heavy Ions Physics, Silicon Nitride, Interdisciplinary Engineering
- by Lorenzo Manti
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- Radiation, Apoptosis, Cell line, Humans

Several very large scale integrated (VLSI) devices which are not available in radiation hardened version are still required to be used in spacecraft systems. Thus these components need to be tested for highenergy heavy ion irradiation to find out their tolerance and suitability in specific space applications. This paper describes the high-energy heavy ion radiation testing of VLSI devices for single event upset (SEU) and single event latch up (SEL). The experimental set up employed to produce low flux of heavy ions viz. silicon (Si), and silver (Ag), for studying single event effects (SEE) is briefly described. The heavy ion testing of a few VLSI devices is performed in the general purpose scattering chamber of the Pelletron facility, available at Nuclear Science Centre, New Delhi. The test results with respect to SEU and SEL are discussed.

- by Carlos Bertulani
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- Physics, Relativistic cosmology, Large Hadron Collider, Heavy Ions Physics

The strain field generated by 200 MeV Ag14+ ions in Si (001) crystals has been investigated using X-ray topography. By choosing suitable diffraction vectors it has been possible to explore the lattice distortion in the inelastic and elastic loss regions separately. Stationary reflection topographs gave two spatially separated images—one originating from the surface and the other from the region affected by elastic nuclear collisions close to the end of the ion range. The spatial separation of these two images is geometrically related to the depth of this elastic loss region. These topographic findings are compared with TRIM calculations.

- by gaurav mehta
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- Materials Engineering, X Rays, Heavy Ions Physics, High energy

The development of the Monte Carlo code SHIELD-HIT (heavy ion transport) for the simulation of the transport of protons and heavier ions in tissue-like media is described. The code SHIELD-HIT, a spin-off of SHIELD (available as RSICC CCC-667), extends the transport of hadron cascades from standard targets to that of ions in arbitrary tissue-like materials, taking into account ionization energy-loss straggling and multiple Coulomb scattering effects. The consistency of the results obtained with SHIELD-HIT has been verified against experimental data and other existing Monte Carlo codes (PTRAN, PETRA), as well as with deterministic models for ion transport, comparing depth distributions of energy deposition by protons, 12C and 20Ne ions impinging on water. The SHIELD-HIT code yields distributions consistent with a proper treatment of nuclear inelastic collisions. Energy depositions up to and well beyond the Bragg peak due to nuclear fragmentations are well predicted. Satisfactory agree...

- by Pedro Andreo and +1
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- Algorithms, Biophysics, Biomedical Engineering, Radiation
- by A. Korgul and +2
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- Heavy Ions Physics, Excited states, Shell Model