Search for dissertations about: "PHOTON ENERGY-RANGE"

Showing result 1 - 5 of 26 swedish dissertations containing the words PHOTON ENERGY-RANGE.

  1. 1. Improvement of electron beam dosimetry using accurate energy-range and photon background models

    Author : Bruno Bakhtiyar Sorcini; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Kärnfysik; Radioaktivitet; Medicin; Radioterapi; Elektrondosimetri;

    Abstract : .... READ MORE

  2. 2. Photon Upconversion in Heavily Doped Semiconductors

    Author : Kilian Mergenthaler; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; ENGINEERING AND TECHNOLOGY; III-V semiconductor materials; nanowires; photoluminescence; Photon upconversion; semiconductors; doping; Fysicumarkivet A:2016:Mergenthaler;

    Abstract : In this thesis the luminescence properties of highly doped semiconductors are studied with focus on degenerately n-doped InP. It is demonstrated how photoluminescence measurements on degenerately doped semiconductors allow an estimation of the doping concentration without need for electrical contacts. READ MORE

  3. 3. Development and application of composite energy deposition kernels for photon therapy planning

    Author : Anders Eklöf; Simo Hyödynmaa; Stockholms universitet; []
    Keywords : Energy deposition kernels; volume overlap algorithm; radiotherapy planning; photon pencil beams; treatment optimization; biological treatment objectives; medicinsk strålningsfysik; Medical Radiation Physics;

    Abstract : In recent years, the use of optimization algorithms in radiation therapy planning has increased dramatically. All optimization algorithms as well as most modern implementations of conventional therapy planning, use energy deposition kernels as a fundamental part of the calculations. READ MORE

  4. 4. Photon induced fluorescence studies of molecules using synchrotron radiation

    Author : Jesús Álvarez Ruiz; KTH; []
    Keywords : Fluorescence; synchrotron radiation; superexcited states; UV.;

    Abstract : This Licentiate thesis presents research accomplished at theSection of Atomic and Molecular Physics at the Royal Instituteof Technology in Stockholm using photon induced fluorescencespectroscopy (PIFS) during the last two years.The main results presented are summarized:- Neutral photodissociation in CO was observed aftersynchrotron photon excitation in the range 19-26 eV bycollecting dispersed fluorescence from excited neutral C atoms. READ MORE

  5. 5. Characterization and Optimization of Silicon-strip Detectors for Mammography and Computed Tomography

    Author : Han Chen; Mats Danielsson; cheng xu; Andrew Maidment; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; mammography; anti-scatter grid; photon-counting; spectral computed tomography; silicon strip; ASIC; energy resolution; Compton scatter; material decomposition; K-edge imaging; Medical Technology; Medicinsk teknologi;

    Abstract : The goal in medical x-ray imaging is to obtain the image quality requiredfor a given detection task, while ensuring that the patient dose is kept as lowas reasonably achievable. The two most common strategies for dose reductionare: optimizing incident x-ray beams and utilizing energy informationof transmitted beams with new detector techniques (spectral imaging). READ MORE