TAILIEUCHUNG - Lesson: Scintillation detectors

Materials describing the composition and fabrication of scintillation detectors, assembly processes Scintillation detectors, assembly techniques and fabrication principles, .invite you to refer | Scintillation detectors HUVINETT 2012 ZnS + ionization radiation (charged particles, EM) Scintillation detectors light emission 1908 E. Regener, E. Rutherford 1940s luminosity is proportional to the absorbed energy What kind of material is suitable to be a scintillator? Requirements. Nuclear measuring methods 1. It can be manufactured in large sizes (10-50 cm) Lecture 4 2. Linearity Dr. Imre Szalóki 3. Transparent crystal associate professor Head of Department of Nuclear Energetics 4. Quick luminescence (fast response) Budapest University of Technology and Economics Institute of Nuclear Techniques (BME NTI) Nuclear measuring methods Lecture 4 Dr. Imre Szalóki., BME NTI BaF2 5. Refractive index n > ≈ Inorganic, organic materials, liquid, gas. 1 General structure of scintillation detectors Nuclear measuring methods Lecture 4 2 Dr. Imre Szalóki., BME NTI Electron-structure of solid-state (Na) E=0 Conduction band Gamma or X-ray radiation 3pband 3sband scintillator crystal 2p 2s 1s Nuclear measuring methods Lecture 4 Dr. Imre Szalóki., BME NTI 3 Nuclear measuring methods Lecture 4 Dr. Imre Szalóki., BME NTI 4 Detectors with inorganic scintillator Electron states in inorganic crystals Energy absorbance in the crystal: light, heat, ionizing radiation Conduction band Electron energy Electron Luminescence in the optical region Activator impurity atoms Na, Tl, Eu, Excitation band Delayed decay process after-glowing time utánvilágítási idő Luminescent center Electron trap Non-radiative metastable state Temperature dependence in scintillation Electron-hole pair Non - radiate states quenching Hole Valence band Nuclear measuring methods Lecture 4 Dr. Imre Szalóki., BME NTI 5 NaI(Tl) scintillator Nuclear measuring methods Lecture 4 Dr. Imre Szalóki., BME NTI 6 NaI absorption properties depending of gamma energy Bridgeman-method for producing single crystals (d < 20-40 cm!) λmax = 410nm, ∆λ = 70 .

• Cơ khí - Chế tạo máy
• Scintillation detectors
• General structure of scintillation detectors
• Electron structure of solid state (Na)
• Electron states in inorganic crystals
• Detectors with inorganic scintillator
• Detectors with inorganic scintillator
• Radiation portal monitors
• Monte Carlo simulation method
• Polyvinyl Toluene
• Plastic scintillator
• Introduction to radiation measurements
• Statistical errors of radiation counting
• Review of atomic and nuclear physics
• Gas filled detectors
• Radioisotopes
• Nuclear Medicine Imaging Systems
• Radioactive Decay Law
• Radiation Measurement
• Gamma Rays