Sökning: "Henning T. Schmidt"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Henning T. Schmidt.

  1. 1. Final-State-Resolved Mutual Neutralization of Li+ and H-

    Författare :Alice F. Schmidt-May; Henning T. Schmidt; Fivos Perakis; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DESIREE; ion; mutual neutralization; collision; lithium; hydrogen; Physics; fysik;

    Sammanfattning : We studied the mutual neutralization of Li+ and H- at effective collision energies of a few hundred meV, which corresponds to temperatures of around 2000 K, in the double ion storage ring DESIREE.We present a new approach to match beam velocities and a new general analysis method for non-fragmenting mutual neutralization at DESIREE. LÄS MER

  3. 2. Precision measurements on negative ions

    Författare :Moa Kristiansson; Henning T. Schmidt; Dag Hanstorp; Henning Zettergren; Christophe Blondel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Negative ions; Atomic physics; Precision measurement; Electron affinity; Photodetachment; Physics; fysik;

    Sammanfattning : In this thesis, experiments with negative ions performed at the DESIREE facility are presented. DESIREE consists of two electrostatic storage rings operated at 13 K. The low temperature in combination with a low pressure allows for storage times of the negative ion beams to be up to several hours. LÄS MER

  4. 3. Precise measurements of electron affinities using Laser Photodetachment Threshold Spectroscopy

    Författare :Jose Eduardo Navarro Navarrete; Henning Zettergren; Henning T. Schmidt; Jan-Erik Rubensson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning :  In this work we have performed Laser Photodetachment Threshold Spectroscopy (LPTS) to determine the electron affinities of the atomic species $^{133}$Cs and $^{16}$O with high precision. The negative ion of Cesium has been produced and investigated at the Gothenburg University Negative Ion and Laser LAboratory (GUNILLA) while the Oxygen anion have been studied in the Double ElectroStatic Ion Ring ExpEriment (DESIREE) at Stockholm University. LÄS MER

  5. 4. Energetic processing of complex molecules in the gas phase

    Författare :Michael Wolf; Henning Zettergren; Henrik Cederquist; T. Henning Schmidt; Christine Joblin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

    Sammanfattning : Collisions between molecules and gas phase targets often lead to various intriguing processes. Such collisions may induce fragmentation of molecules that can be divided into different subsets depending on the projectile, target, and collision energy. LÄS MER

  7. 5. Experiments on mutual neutralization using storage rings with merged ion beams

    Författare :Gustav Eklund; Henning T Schmidt; Henrik Cederquist; Ansgar Simonsson; Daniel W. Savin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mutual neutralization; storage rings; merged beams; fysik; Physics;

    Sammanfattning : This thesis presents work on merged-beams experiments using the DESIREE facility, which consists of two electrostatic ion-storage rings operated at cryogenic temperatures of about 13 K. The two storage rings have a common straight section, where oppositely charged ions can interact at sub-eV collision energies. LÄS MER