Sökning: "Heavy ion physics"

Visar resultat 16 - 20 av 75 avhandlingar innehållade orden Heavy ion physics.

  1. 16. Three Pion Interferometry in the NA44 Experiment

    Författare :Janus Schmidt-Sörensen; Kärnfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum field theory; heavy-ion physics; bose-einstein; Elementary particle physics; interferometry; Elementarpartikelfysik; kvantfältteori; Fysicumarkivet A:1999:Schmidt-Sörensen;

    Sammanfattning : This thesis presents a three-particle correlation analysis with pions originating from Sulphur-Lead and Lead-Lead collisions at 200 and 158 GeV/c per nucleon respectively, taken by the CERN heavy-ion experiment NA44. The genuine three-body correlation is suppressed in both colliding systems which indicates that the particle production source is partly coherent. LÄS MER

  3. 17. Statistical and Dynamical Aspects of Intermediate Energy Nuclear Collisions

    Författare :Roberta Ghetti; Fysiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; excitation function.; subthreshold pions; pion production; neutron cross-talk; correlation function; interferometry; intermittency; phase transition; thermal scaling; reducibility; multifragmentation; Heavy ion collisions; intermediate energy; Atomic and molecular physics; Atom- och molekylärfysik; Fysicumarkivet A:1997:Ghetti;

    Sammanfattning : Studies of intermediate energy heavy ion reactions have revealed the existence of a number of reducibility and thermal scaling properties in nuclear multifragmentation. In particular, the probability of emitting n-fragments is reducible to the probability of emitting a single fragment through the binomial distribution. LÄS MER

  4. 18. Electron - Ion Recombination Studies of Astrophysically Relevant Ions : Storage Ring and Electron Beam Ion Trap Based Measurements

    Författare :Istvan Orban; Reinhold Schuch; Yaming Zou; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; atomic processes; electron-ion recombination; plasma; Physics; Fysik; fysik; Physics;

    Sammanfattning : This thesis contains experimental work that was performed at two state-of-the art devices for electron-ion collision physics, at a heavy-ion storage ring and at an Electron Beam Ion Trap. As a result, absolute recombination rate coefficients for H-like Si, He-like Si, Be-like Si, and Na-like Si, as well as Be-like Ne, Na-like S and Na-like Ar are reported over a wide energy range from μeV to keV. LÄS MER

  5. 19. Studies of collective phenomena in neutron deficient nuclei : by means of lifetime measurements, angular correlation measurements and the recoil-decay tagging technique

    Författare :Karin Andgren; Bo Cederwall; Paul Nolan; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; heavy-ion reactions; multi-detector arrays; recoil separator; in-beam gamma-ray spectroscopy; high spin states; lifetime measurements; recoil-decay tagging; nuclear shape; Nuclear physics; Kärnfysik;

    Sammanfattning : The nucleus is a mesoscopic system that retains features from both the quantum and macroscopic worlds. A basic property of a macroscopic body is its shape. Nuclear shapes can be deduced from experimental data as they influence the excitation mode of the nucleus and hence the energies and lifetimes of its excited levels. LÄS MER

  7. 20. Search for Supersymmetry in Monojet Final States with the ATLAS Experiment

    Författare :Gabriele Bertoli; Christophe Clement; Joakim Edsjö; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ATLAS supersymmetry dark matter; Physics; fysik;

    Sammanfattning : The Large Hadron Collider is the most powerful particle accelerator built to date. The LHC is a proton–proton and heavy ion collider, in 2015 it operated at an un- precedented center of mass energy of sqrt(s) = 13 TeV. LÄS MER