Sökning: "alpha particles"

Visar resultat 1 - 5 av 15 uppsatser innehållade orden alpha particles.

  1. 1. Project on Radon Dosimetry

    Master-uppsats, Mittuniversitetet/Institutionen för elektronikkonstruktion

    Författare :Dongxue Guo; [2020]
    Nyckelord :Radon; detector; alpha particles;

    Sammanfattning : The World Health Organization lists radon as one of the 19 most important substances that cause cancer. As a naturally occurring harmful gas, Radon mostly exist in rocks, making caves, mines, etc. However, since Radon gas has great ability to dissolve in water, radon can travel to anywhere. LÄS MER

  2. 2. Implementation and characterization of Silicon detectors for studies on neutron-induced nuclear reactions

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik

    Författare :Leo Lehtilä; [2019]
    Nyckelord :Silicon detector; Silicon telescope; Ultra-thin silicon detector; Energy resolution; Radioactive source; Am-241; Cf-252; Fission Fragments; Alpha Particles;

    Sammanfattning : Energy resolution characteristics of silicon surface barrier detector signals amplified by different preamplifiers and spectroscopic amplifiers have been studied. The characterization has been done using alpha particles from an 241Am source and spontaneous fission fragments from two Cf sources. LÄS MER

  3. 3. Dosimetry of ionizing radiation with an artificial neural network : With an unsorted, sequential input

    Kandidat-uppsats, Mittuniversitetet/Avdelningen för elektronikkonstruktion

    Författare :Ivan Appelsved; [2018]
    Nyckelord :Artificial neural network; recurent neural network; ionizing radiation; dosimetry; timepix3 radiation camera;

    Sammanfattning : In this thesis the verification of a neural network’s proficiency at labeling ionizing radiation particles from the unsorted output of a timepix3 camera is attempted. Focus is put on labeling single particles in separate data sequences with slightly preprocessed input data. LÄS MER

  4. 4. Development and Characterization of Parallel-Plate Avalanche Counters for Nuclear Physics Experiments

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad kärnfysik

    Författare :Matthias Carlsson; [2018]
    Nyckelord :PPAC; Parallel-Plate Avalanche Counters; Gas Ionizing Detector; Gas Amplification; Characterization; NFS; Radioactive source; Am-241; Cf-252; Fission Fragments; Alpha Particles; Time Resolution; Angular Dependence; Gas Pressure Dependence; Townsend Coefficient; PPAC Design; Manufacture; Manufacturing; Mylar foil; Aluminium Evaporation;

    Sammanfattning : Parallel-plate avalanche counters, PPACs, are commonly used to detect fission fragments. The PPAC detects them and mark (very accurately) the time of detection. Such measurements can be used to measure the neutron energy (via time-of-flight) to study neutron-induced fission. LÄS MER

  5. 5. Initial Characterization of a Pixelated Thermal-Neutron Detector

    Master-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Amanda Jalgén; [2017]
    Nyckelord :Neutron; detector; spallation; scintillator; photomultiplier tube; Physics and Astronomy;

    Sammanfattning : The purpose of this project was to develop a better understanding of the re- sponse of a pixelated thermal-neutron detector, which will be used as a thermal- neutron detector at one of the beam lines at the European Spallation Source in Lund, Sweden. The detector consists of a thin Lithium6-glass scintillator, a multi-anode photomultiplier tube and associated read-out electronics. LÄS MER