Search for dissertations about: "kerma"

Showing result 1 - 5 of 11 swedish dissertations containing the word kerma.

  1. 1. From Particle-Production Cross Sections to KERMA and Absorbed Dose for the Case 96 MeV n-12C Interactions

    Author : Bel E. Bergenwall; Ayşe Ataç; Eva Lund; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Fast neutrons; En = 96 MeV; charged-particle production; 12C n; px ; 12C n; dx ; 12C n; tx ; 12C n; 3Hex ; 12C n; ax reactions; cross sections; KERMA; microscopic measurements; absorbed dose; Kärnfysik; Nuclear physics; Kärnfysik;

    Abstract : Neutron-carbon interactions have been studied with a focus on charged-particle production of relevance to radiation protection and medical applications, such as cancer therapy. The measurements have been performed using the particle-detection setup, MEDLEY, and the 96 MeV neutron beam at the The Svedberg Laboratory in Uppsala. READ MORE

  2. 2. Elastic Neutron Scattering at 96 MeV

    Author : Joakim Klug; Jan Blomgren; Arjan Plompen; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; neutron; detection; CsI; elastic scattering; differential cross section; optical potential; kerma; Kärnfysik; Nuclear physics; Kärnfysik; Applied Nuclear Physics; Tillämpad kärnfysik;

    Abstract : A facility for studies of elastic neutron scattering in the 50–130 MeV range has been developed. In addition to elastic neutron scattering, it has been used for (n,p) and (n,d) reaction experiments. The performance of the device has been illustrated in measurements of the (n,p) and (n,n) cross sections on 1H and 12C. READ MORE

  3. 3. Calibration of Ionization Chambers for Measuring Air Kerma Integrated over Beam Area in Diagnostic Radiology

    Author : Peter Larsson; Gudrun Alm Carlsson; Jan Persliden; Bertil Axelsson; Linköpings universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; KAP-meter; DAP-meter; PKA; kerma area product; energy dependence; calibration; Radiological physics; Radiofysik;

    Abstract : The air kerma area product PKA is an important quantity used by hospital physicists in quality assurance and optimization processes in diagnostic radiology and is recommended by national authorities for setting of diagnostic reference levels. PKA can be measured using a transmission ionization chamber (kerma area product (KAP) meter) mounted on the collimator housing. READ MORE

  4. 4. Development and evaluation of an independent system for absorbed dose calculations in radiotherapy

    Author : Stefan Johnsson; Lund Medicinsk strålningsfysik; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; medicinsk instrumentering; tomografi; radiologi; Klinisk fysiologi; tomography; medical instrumentation; radiology; Clinical physics; cancer; Cytologi; onkologi; cancerology; oncology; Cytology; PDA; mini-phantom; in-air equivalence; primary kerma; transmission measurement; stopping power ratio; entrance dose; beam quality; quality control; error prevention; monitor unit calculation; radiation therapy; dose calculation;

    Abstract : The aim of this work was to develop, implement and evaluate an independent system with which to calculate the absorbed dose, delivered by high-energy X-ray beams, to the prescription point and the depth of dose maximum. The introduction of such a system in the clinical routine may help ensure high-quality treatment and avoidance of errors which may jeopardise the clinical outcome of the treatment (i. READ MORE

  5. 5. Experimental studies of neutron-induced reactions in light nuclei

    Author : Somsak Dangtip; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Charged-particle spectrometers; 12C n; xp ; n; xd and n; xt reactions; double-differential cross section; partial and total kerma coefficients; 9Be n; p 9Li reaction; Gamow-Teller unit cross section; neutron-proton scattering; En=100 MeV; Kärnfysik; Nuclear physics; Kärnfysik; Applied Nuclear Physics; tillämpad kärnfysik;

    Abstract : Nuclear reactions induced by neutrons in light nuclei at around 100 MeV are studied in this thesis using two detection facilities, MEDLEY and LISA.The measurements were performed at the unique neutron beam line of the The Svedberg Laboratory in Uppsala.The MEDLEY facility has been developed to conduct experiments within, e.g. READ MORE