Sökning: "decay ratio"

Visar resultat 6 - 10 av 56 avhandlingar innehållade orden decay ratio.

1. 6. On Alpha-decay and Alpha Clustering

   Författare :Gordana Dodig Crnkovic; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The half-life for the Alpha-decay of 212 Po is calculated within a harmonic oscillator representation. Clustering induced by the nuclear interaction appear by considering alarge configuration space. The role of clusterisation in the alpha-decay process isclearly demonstrated. LÄS MER

3. 7. Isomeric yield ratio measurements with JYFLTRAP : In quest of the angular momentum of the primary fragments

   Författare :Vasileios Rakopoulos; Mattias Lantz; Stephan Pomp; Andreas Solders; José Benlliure; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; nuclear fission; angular momentum; fission fragments; isomeric yield ratios; fission products; scission; Penning trap.; Physics with specialization in Nuclear Physics; Fysik med inriktning mot kärnfysik;

   Sammanfattning : In this thesis, isomeric yield ratios of twenty nuclides produced in the fission of natU and 232Th by protons at 25-MeV and natU by high-energy neutrons were studied. The experiments were performed at the IGISOL-JYFLTRAP facility at the University of Jyväskylä. LÄS MER

4. 8. Phosphor Thermometry on Surfaces - A Study of its Methodology and its Practical Applications

   Författare :Christoph Knappe; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Coating Thickness; Temperature Calibration; Two-Colour Ratio; Lifetime Decay; Thermometry; Thermographic Phosphor; Laser Combustion Diagnostics; Laser-Induced Phosphorescence; Non-Linearity; ICCD; PMT; Signal Processing Algorithms; Fysicumarkivet A:2013:Knappe;

   Sammanfattning : Phosphor Thermometry is a term describing an optical measurement technique for remote temperature sensing. Its working principle is based on the temperature-sensitive emission characteristics of certain ceramic substances termed thermographic phosphors. LÄS MER

5. 9. Laser-Induced Phosphor Thermometry - Feasibility and Precision in Combustion Applications

   Författare :Johannes Lindén; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Laser-Induced Phosphorescence; Laser Combustion Diagnostics; Non-linearity; Image Intensifier; Two-color Ratio; Lifetime Decay; Precision; Thermographic Phosphors; Temperature measurements; Fysicumarkivet A:2012:Lindén;

   Sammanfattning : Temperature is one of the most fundamental parameters to be measured in many research disciplines. In combustion science, a thorough knowledge of temperature is essential for improving and optimizing combustion processes. LÄS MER

7. 10. Development of a Noise-Based Method for the Determination of the Moderator Temperature Coefficient of Reactivity (MTC) in Pressurized Water Reactors (PWRs)

   Författare :Christophe Demaziere; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; point-kinetics; Decay Ratio DR ; Gamma-Thermometer GT ; temperature noise structure of the ; correlation length; boron dilution method; noise analysis; core calculations; dynamic reactor transfer function; moderator temperature coefficient MTC ;

   Sammanfattning : The Moderator Temperature Coefficient of reactivity (MTC) is an important safety parameter of Pressurized Water Reactors (PWRs). In most countries, the so-called at-power MTC has to be measured a few months before the reactor outage, in order to determine if the MTC will not become too negative. LÄS MER