Search for dissertations about: "molecular rotation"

Showing result 1 - 5 of 76 swedish dissertations containing the words molecular rotation.

  2. 1. Numerical simulation of the dynamics of a trapped molecular ion

    Author : Avazeh Hashemloo; Claude Dion; Michael Drewsen; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; diatomic molecular ion; linear Paul trap; rigid rotor; quantum rotational dynamics; wave-packet dynamics; time-dependent Schrödinger equation; stability;

    Abstract : This thesis explores the dynamics of a heteronuclear diatomic molecular ion, possessing a permanent electric dipole moment, µ, which is trapped in a linear Paul trap and can interact with an off-resonance laser field. To build our model we use the rigid-rotor approximation, where the dynamics of the molecular ion are limited to its translational and rotational motions of the center-of-mass. READ MORE

  4. 2. On electrostatic effects, minimal motion and other catalytic strategies used by enzymes

    Author : Per-Olof Syrén; Karl Hult; Jiri Damborsky; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; Biokemi; SRA - Molecular Bioscience; SRA - Molekylär biovetenskap;

    Abstract : Enzymes are powerful biocatalysts that provide rate accelerations of up to 1019 fold compared to the corresponding uncatalyzed reaction in solution. The origin of the remarkable performance displayed by enzymes has fascinated and puzzled researchers for over a hundred years. READ MORE

  5. 3. Visible spectroscopy as a sensitive diagnostic tool for fusion plasmas

    Author : Sheena Menmuir; Elisabeth Rachlew-Källne; Mats Larsson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular physics; Molekylfysik;

    Abstract : To further the understanding and knowledge about fusion plasmas and their behaviour during different conditions, it is important to be able to collect information about the plasma and the processes occurring within it. Visible spectroscopy, or the study of the visible wavelength light emitted by the plasma, is a useful tool in this search for knowledge. READ MORE

  6. 4. On the Use of Rotational CARS on Polyatomics and in Time Domain

    Author : Ali Hosseinnia; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Rotational CARS; Laser Diagnostics; Ethylene; Ethane; Internal Rotation; Coherent Lifetime; ultrafast spectroscopy; Fysicumarkivet A:2020:Hosseinnia;

    Abstract : This thesis work concerns the further developments of dual-broadband rotational coherent anti-Stokes Raman spectroscopy (RCARS) through experimental and theoretical investigations. Rotational CARS is an established technique for gas-phase thermometry and concentration measurement with major applications in combustion diagnostics. READ MORE

  7. 5. Development and Application of Pure Rotational CARS for Reactive Flows

    Author : Alexis Bohlin; Förbränningsfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Raman linewidths; gas-phase thermometry; combustion diagnostics; laser spectroscopy techniques; coherent anti-Stokes Raman scattering; molecular spectroscopy; Herman-Wallis factor; Fysicumarkivet A:2012:Bohlin;

    Abstract : The thesis deals with the further development of pure rotational coherent anti-Stokes Raman spectroscopy (RCARS) for improving the capabilities of gas phase thermometry. The main effort has been to make the technique more robust when employed under a wide range of temperatures and operational conditions. READ MORE