Search for dissertations about: "heavy-ions"

Showing result 1 - 5 of 23 swedish dissertations containing the word heavy-ions.

  1. 1. Nanopatterning by Swift Heavy Ions

    Author : Marek Skupinski; Klas Hjört; Jens Jensen; Christina Trautmann; Uppsala universitet; []
    Keywords : Materials science; swift heavy ions; lithography; nanopatterning; self-assembly; Materialvetenskap;

    Abstract : Today, the dominating way of patterning nanosystems is by irradiation-based lithography (e-beam, DUV, EUV, and ions). Compared to the other irradiations, ion tracks created by swift heavy ions in matter give the highest contrast, and its inelastic scattering facilitate minute widening and high aspect ratios (up to several thousands). READ MORE

  2. 2. AMS with heavy ions at a small tandem accelerator

    Author : Madis Kiisk; Kärnfysik; []

    Abstract : [abstract missing].... READ MORE

  3. 3. Heavy-ion transport codes for radiotherapy and radioprotection in space

    Author : Davide Mancusi; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; charge-changing cross sections; transport codes; radiotherapy; Monte-Carlo codes; heavy ions; radioprotection in space;

    Abstract : Simulation of the transport of heavy ions in matter is a field of nuclear science that has recently received attention in view of its importance for some relevant applications. Accelerated heavy ions can, for example, be used to treat cancers (heavy-ion radiotherapy) and show some superior qualities with respect to more conventional treatment systems, like photons (x-rays) or protons. READ MORE

  4. 4. Radiation and matter: how do they play with each other?

    Author : Davide Mancusi; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; heavy ions; models; transport codes; Boltzmann equation; Monte Carlo; radioprotection in space; radiotherapy; nuclear reactions;

    Abstract : The propagation of radiation is affected by the presence of matter; at the same time, the physicochemical properties of matter are modified by the passage of radiation. The interplay of radiation and matter is of crucial importance in many modern applications: accelerated heavy ions, in particular, can be used in radiotherapeutical treatments of some cancers; moreover, they are present in the space radiation environment and represent a serious threat to the health of spaceship crews and to the functionality of electronic equipment on board. READ MORE

  5. 5. Fragmentation cross sections: measurement, systematics and model developement

    Author : Chiara La Tessa; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; projectile total charge-changing cross sections; weak factorization; strong factorization; projectile partial charge-changing cross sections; heavy-ions; space radioprotection; nuclear fragmentation;

    Abstract : Man's attitude towards space exploration has been mainly limited by the health risk related to the exposure to the space radiation environment. Some components of the space field can be characterized by such a high flux to kill a man if directly exposed and in general, all space radiation constitutes a hazard for astronauts engaged in long-term missions. READ MORE