Dissertation > Excellent graduate degree dissertation topics show

Flat energy response silver activation detector developed its strong X, γ field neutron fluence measurement

Author: FanRuiFeng
Tutor: MaJingFang
School: Chinese Academy of Engineering Physics
Course: Nuclear Energy Science and Engineering
Keywords: pulsed neutron neutron activation neutron flux photonuclear reaction
CLC: TL816
Type: Master's thesis
Year: 2004
Downloads: 85
Quote: 0
Read: Download Dissertation

Abstract


This paper describes a silver activation detector, which has been built and calibrated to measure the mixed X, Y ,n pulsed radiate fields. This detection system is composed of silver foil, G-M counter, polyethylene moderators, shielding harness of scattering neutron etc. Its modular design allows several efficiency vs. energy responses is the almost same from 0.144MeV to 14MeV. Calibration coefficients obtained for two distances and six neutron energies based on the method for stopping the radiation after the detector is saturated using an accelerator-type neutron source. The detector efficiency is 8.4x10’7 to 1.2x10-6 from 0.144MeV to 14.8MeV and 1.1xl0-6~1.2xl0-6 from 0.144MeV to 5MeV. Its uncertainty is below 10%. This detection system then is used in the LIA of 12MeV to measure the neutron flux of (X,n) reaction and obtained that neutron yield is 2.6x109~3.7x109n/pulse.

Related Dissertations

  1. The Application of NAA in Airborne Particular Matter Pollution in East District of Chengdu,X513
  2. The Cross-section of Measurement and the Research for Entanglement Criterion,O413.3
  3. Study of the Method for Producing the Radioactive Isotopes Hf、Lu and Yb,R817.4
  4. The Study of Varied Thickness of Coal Seam Using MCNP Method in the Coal Quality Analysis Experiment by Neutron,O571.5
  5. The Laoheishan Area Uranium Mine (Polymetallic) Prospects the Direction Research,P619.14
  6. The Research of the Prospective Direction of Uranium in Yanba,P619.14
  7. Study on Organohalogens in Atmosphere in Shijingshan District, Beijing,X51
  8. Study on Organohalogens Contaminations in Precipitation in Shijingshan District, Beijing,X50
  9. Numerical Calculation and Research of Thermal Environment for Projectiles’ Head with Heat Source Term,TJ410.1
  10. The Study of APM in Beijing by Neutron Activation Analysis,X831
  11. Development and Research of Neutron Flux Data Acquisition Technique with Multiple Space-Time Channels Based on a Microcomputer,TL375.4
  12. Typomorphic Research on Carp’s Otoliths for Fresh Water Quality Evaluation,P342
  13. A nuclear facility the field area nuclides in the distribution of the plant - soil,X837
  14. The ADS subcritical experiment platform spatial and temporal characteristics of the neutron flux density \,TL375.11
  15. China Spallation Neutron Source target - reflector - moderator system simulation and optimization studies,O571.5
  16. Research of Effective Neutron Multiplication Factor and Neutron Flux Distribution for Accelerator Driven Sub-Critical System on DF-3 Facility,TL32
  17. Research of Data Processing Method for Oil Saturation Using Pulsed Neutron Full Spectra Logging,P631.81
  18. The Mechanism and Effect of Long-term Exposure to the Lanthanum Chloride on the Centre Neural System,R114
  19. Subcellular Distribution of Trace Elements and Se-Containing Proteins in Hepatocellular Carcinoma,R735.7
  20. Cross-Sections for Reactions Induced by 14 MeV Neutrons and Systematics Studies,O571.4

CLC: > Industrial Technology > Nuclear technology > Particle detection,radiation detection and nuclear instrumentation > Radiation detection technology and instrumentation > Neutrons and other radiation detectors
© 2012 www.DissertationTopic.Net  Mobile