tailieunhanh - Measurement of thermal neutron capture cross section and resonance integral for the 45Sc(n, γ)46Sc reaction with pulsed neutrons

In order to improve the accuracy of the experimental results the effect of the non-ideal epithermal spectrum was taken in to account by determining the neutron spectrum shape factor (α), and the corrections for the thermal (Gth) and the resonance (Gepi) neutron self-shielding effects, the γ-ray attenuation (Fg) and the γ-ray coincidence summing effect were made. The thermal neutron cross-section for the 45Sc(n,γ) 46Sc reaction has been determined to be σo = ± barn. | Communications in Physics, Vol. 24, No. 3S2 (2014), pp. 29-37 DOI: MEASUREMENT OF THERMAL NEUTRON CAPTURE CROSS SECTION AND RESONANCE INTEGRAL FOR THE 45 Sc(n, γ)46 Sc REACTION WITH PULSED NEUTRONS NGUYEN VAN DO, PHAM DUC KHUE, KIM TIEN THANH, NGUYEN THI HIEN Institute of Physics, Vietnamese Academy of Science and Technology KIM GUINYUN Department of Physics, Kyungpook National University, Daegu 702-701, Republic of Korea E-mail: ngvando@ Received 04 April 2014 Accepted for publication 24 May 2014 Abstract. Thermal neutron capture cross section and resonance integral for the 45 Sc(n,γ)46 Sc reaction were measured by the activation method using the 197 Au(n,γ)198 Au reaction as a single comparator. The high-purity scandium and gold samples with and without Cd cover with the thickness of mm were irradiated in a pulsed neutron field of the 100 MeV electron linac of the Pohang Accelerator Laboratory (PAL). The induced activities in the activated foils were measured with a well calibrated HPGe detector. In order to improve the accuracy of the experimental results the effect of the non-ideal epithermal spectrum was taken in to account by determining the neutron spectrum shape factor (α), and the corrections for the thermal (Gth ) and the resonance (Gepi ) neutron self-shielding effects, the γ-ray attenuation (Fg ) and the γ-ray coincidence summing effect were made. The thermal neutron cross-section for the 45 Sc(n,γ)46 Sc reaction has been determined to be σo = ± barn. By assuming the cadmium cut-off energy of eV, the resonance integral for the 45 Sc(n,γ)46 Sc reaction has been determined to be Io = ± barn. The present results are compared with the reference data and discussed. Keywords: thernal neutron cross-section; resonance integral; Cd-ratio method. 45 Sc(n,γ)46 Sc reaction; gold monitor; electron linac; I. INTRODUCTION The thermal neutron capture cross sections and resonance integrals are .

• Vật lý
• Communications in Physics
• Thermal neutron capture cross section and resonance integral
• The 45Sc(n
• γ)46Sc reaction with pulsed neutrons
• The corrections for the thermal
• Neutron self shielding effects
• Challenges in particle physics and 3 3 1 models
• Particle physics and 3 3 1 models
• Particle theory and field theory models
• The early Universe
• Non standard model neutrino
• The 3 3 1 models in current particle physics
• Current particle physics
• The Standard Model
• The electro weak
• The process of e+e − → µ +µ
• The randall sundrum model
• Supersymmetric model and unparticle physics
• Randall Sundrum model
• Supersymmetric and Unparticle physics
• Handbook of mechanical engineering
• mechanical engineering
• mechanical design
• mechanical materials
• alloy materials
• Energy Technology
• Compact device model for nanoparticle organic memory transistor’s characterization
• Nanoparticle organic memory transistor
• Hybrid integrated circuit
• Hybrid NOMFET CMOS neuromorphic computing circuit
• Microdroplet in T junction microfluidic system
• Experiment and simulation
• T junction microfluidic system
• Lateral channel decrease
• Optical bistability in three level eit configurations
• Three level eit configurations
• Effects of atomic coherence
• OB in V type system
• Dynamical codimension 2 brane
• Warped six dimensional space time
• Codimension 2 brane
• Warped 6D bulk space time
• Coherent diffractive imaging using table top high harmonic generation
• Coherent diffractive imaging
• Table top high harmonic generation
• Growth of single crystals of methylammonium lead mixedhalide perovskites
• Growth of single crystals
• Methylammonium lead mixedhalide perovskites
• Organo lead mixed halide perovskites
• Tuning electronic transport properties
• Zigzag graphene nanoribbons
• Stone wales defect
• Negative differential resistance
• Asymmetric and symmetric ZGNRs
• The transmembrane italian mutant
• The temperature replica exchange molecular dynamics
• TmE22K trimer structure
• Kinetics probably yield
• Electrochemical fabrication of hybrid plasmonic dielectric nanomaterials
• Gold diamond clusters
• Hybrid plasmonic dielectric nanomaterials
• hybrid plasmonic dielectric materials
• Electron microscopy and optical characterization
• X ray absorption fine structure
• BCC crystals studied
• High order expanded debye waller factors
• Debye Waller factors
• Temperature dependent cumulants
• Nonlinear optics in waveguide arrays and photonic nanowires
• Nonlinear optics in waveguide arrays
• Diffractive resonant radiation
• The spectral body of the pulse
• Radion production in high energy photon collisions
• Solve the hierarchy problem
• Energy loss function for lead
• Local field effect
• Adiabatic local density approximation
• First principles calculations shows good agreemen
• Perturbative nonlinear optics in the extreme ultraviolet region
• The extreme ultraviolet region
• Different extreme ultraviole
• Multiple cycle pulses
• Thermodynamic hadron quark phase transition
• Chiral nuclear matter to quark gluon plasma
• Quark gluon plasma
• Equilibrium properties near critical points
• Phase transitions and critical phenomena
• Chirality of light in hybrid modes
• Vacuum clad ultrathin optical fibers
• Ultrathin optical fibers
• Superchiral outside the fiber
• An advanced logarithmic phase mask for extending depth
• Field of hybrid optical systems
• Modulation transfer functions
• Hybrid imaging system
• Hyperon W production in pp collisions at energy 8 tev
• Investigate the hadronization process
• The RICH detector
• The nominal value
• Profile of the 12co(3 2) emission line detected
• The debris disc of 49 ceti
• Require relatively violent
• Generate secondary gas
• Synthesis and optical characterization
• Building block plasmonic gold nanostructures
• Random nano islands
• Random Au nano islands
• Electrochemical performance of Na0
• 44Mno2 synthesized
• Hydrothermal method using as a cathode material
• Sodium ion batteries
• Sodium ion battery
• Stable during cycling