Joint iaea ictp workshop on nuclear reaction data for advanced reactor technologies
This presentation is the property of its rightful owner.
Sponsored Links
1 / 11

Joint IAEA-ICTP Workshop on Nuclear Reaction Data for Advanced Reactor Technologies PowerPoint PPT Presentation


  • 55 Views
  • Uploaded on
  • Presentation posted in: General

Joint IAEA-ICTP Workshop on Nuclear Reaction Data for Advanced Reactor Technologies. Student’s presentation Calculation of correction factors for neutron capture cross section measurements Pham Ngoc Son, Nuclear Research Institute, VAEC, Vietnam. Introduction.

Download Presentation

Joint IAEA-ICTP Workshop on Nuclear Reaction Data for Advanced Reactor Technologies

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Joint iaea ictp workshop on nuclear reaction data for advanced reactor technologies

Joint IAEA-ICTP Workshop on Nuclear Reaction Data for Advanced Reactor Technologies

Student’s presentation

Calculation of correction factors for neutron capture cross section measurements

Pham Ngoc Son, Nuclear Research Institute, VAEC, Vietnam


Joint iaea ictp workshop on nuclear reaction data for advanced reactor technologies

Introduction

  • The average capture cross sections, <a>, at an average neutron spectrum energy can be measured relative to the standard capture cross section of 197Au by activation method:

fc: correction factors


Introduction

Introduction

  • Correction factors must be introduced to take into account:

    • Multi-scattering of neutron in sample

    • Self-shielding effect

    • Resonance capture with neutrons in low energy background region

Monte Carlo

simulation

Exactly estimation of neutron spectrum

(unfolding method)


Computer programs

Computer programs


Computer programs1

Computer programs


Joint iaea ictp workshop on nuclear reaction data for advanced reactor technologies

Computer programs

69.2eV

70.4eV

Th-232


Computer programs2

Computer programs

Unfolding neutron spectrum of 54keV filtered neutron beam at Dalat Reactor


Computer programs3

Computer programs

Unfolding neutron spectrum of 148.3keV filtered neutron beam at Dalat Reactor


Computer programs4

Computer programs

In a neutron activation experiment, the reaction rate will be measured indirectly, by detection of emitted decay gamma rays from the product nucleus:

Can be Measured by using a HPGe Detector

The second term accounts for the effect of neutron in background region.

The first term of the reaction rate accounts for the effect of neutrons in the primary region of spectrum.


Experimental results

Experimental results

Results of measured capture cross section for some nuclei


Joint iaea ictp workshop on nuclear reaction data for advanced reactor technologies

Thank you for your attention!


  • Login