Sökning: "neutron scattering"

Visar resultat 11 - 15 av 159 avhandlingar innehållade orden neutron scattering.

  1. 11. Neutron Irradiation Techniques

    Författare :Julius Scherzinger; Kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; actinide Be; fast-neutrons; NE-213 liquid scintillator; He-4 scintillators; pulse-shape discrimination; Cf-252; absolute detection efficiency; neutron irradiation; Fysicumarkivet A:2016:Scherzinger;

    Sammanfattning : The He-3 “crisis” has become a fact in the last decade and large scale neutron detectors based on He-3 technologies have become unaffordable. This new He-3 reality has resulted in a major effort worldwide to develop replacement neutron-detector technologies. LÄS MER

  3. 12. A Fast Pixelated Thermal-Neutron Detector

    Författare :Emil Rofors; Kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SoNDe; thermal-neutron detector; GS20 scintillator; Li-glass; H12700A MAPMT; position-dependent response; alpha-particle; proton; deuteron; neutron; ESS; SKADI;

    Sammanfattning : This thesis presents the study of a position-sensitive scintillation-based detector called the Solid-State Neutron Detector (SoNDe). SoNDe is being developed for cold- and thermal-neutron detection at the small-angle neutron scattering (SANS) instrument SKADI at the European Spallation Source (ESS), currently under construction in Lund, Sweden. LÄS MER

  4. 13. Utilization of Low Voltage D-T Neutron Generators in Neutron Physics Studies

    Författare :Somsorn Singkarat; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; D-T neutron generator; double-differential cross-section DDX ; n-1H scattering; directional neutron detector; time-of-flight method; natural iron; scintillation fibers; neutron energy converter;

    Sammanfattning : In a small nuclear laboratory of a developing country a low voltage D-T neutron generator can be a very useful scientific apparatus. Such machines have been used successfully for more than 40 years in teaching and scientific research. LÄS MER

  5. 14. Opportunities and challenges of surface scattering at next generation neutron sources

    Författare :Franz Alois Adlmann; Henrich Frielinghaus; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; GISANS; data reduction; off-specular; neutron scattering; reflectometry; complex fluids; rheology;

    Sammanfattning : Complex fluids and soft matter are ubiquitously found in the world and all contacts in life are made over surfaces. To describe the mechanical behavior of such substances, rheological methods are used. Flow instabilities are a big challenge in rheology since they will be reflected in the macroscopic variables probed, like e. g. LÄS MER

  7. 15. Neutron Scattering Experiments and Computer Simulation Studies of a Polymer Electrolyte

    Författare :Patrik Carlsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; neutron scattering; reverse Monte Carlo simulation; PPO-LiClO4; poly propylene oxide ; polymer electrolytes; polymer dynamics;

    Sammanfattning : Polymer electrolytes are regarded as key components in promising new types of batteries for portable electronic devices and electric cars. Batteries for such applications require polymer electrolytes with improved properties, e.g. a higher ionic conductivity. LÄS MER