Sökning: "In situ gamma ray spectrometry"

Hittade 3 avhandlingar innehållade orden In situ gamma ray spectrometry.

  1. 1. Improving accuracy of in situ gamma-ray spectrometry

    Författare :Jonas Boson; Christer Samuelsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; gamma-ray spectrometry; in situ measurement; HPGe detector; 137Cs; Monte Carlo; efficiency calibration; measurement uncertainty; Radiological physics; Radiofysik;

    Sammanfattning : Gamma-ray spectrometry measurements performed on site, or “in situ”, is a widely used and powerful method that can be employed both to identify and quantify ground deposited radionuclides. The purpose of this thesis is to improve the calibration of high purity germanium (HPGe) detectors for in situ measurements, and calculate the combined uncertainty and potential systematic effects. LÄS MER

  3. 2. In situ measurements of radionuclide concentration in soil : An investigation into detector properties and methods

    Författare :Johan Kastlander; Christoph Bargholtz; Mats Isaksson; Stockholms universitet; []
    Nyckelord :In situ gamma-ray spectrometry; LaBr3; CdTe; Cs-137; soil samples; fysik; Physics;

    Sammanfattning : In case of a release of radioactive nuclides into the environment it is necessary to  have reliable methods to estimate the potential effect on people and the ecosystem. In this context the total activity deposited, the elemental composition and the depth distribution are of importance. LÄS MER

  4. 3. Development of methods for in situ measurements of radioactivity in the enviroment

    Författare :Johan Kastlander; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; In situ gamma ray spectrometry; CdTe; HPGe; Low energy physics; Lågenergifysik;

    Sammanfattning : In case of a release of radioactive nuclides into the environment it is necessary to have reliable methods to estimate the potential effect on population and ecosystem. In this context the total activity deposited, the elemental composition and its depth distribution are of importance. LÄS MER