Inelastic Neutron Scattering in the Region A = 11–40

1972 ◽  
Vol 50 (6) ◽  
pp. 553-562 ◽  
Author(s):  
L. Nichol ◽  
T. J. Kennett
Keyword(s):  
Neutron Scattering ◽  
Gamma Ray ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Exponential Form ◽  
Relative Population ◽  
Model Based ◽  
Fission Spectrum

The (n,n′γ) reaction has been studied for the nuclides 11B, 14N, 19F, 23Na, 27Al, 28Si, and 40Ca through the use of fission-spectrum neutrons. The gamma-ray spectra obtained using a Ge(Li)–NaI(Tl) split-annulus spectrometer revealed that levels up to 9 MeV are populated. Analysis of the gamma-ray spectra permitted the derivation of decay schemes and, from the branching, the primary population of each level observed. Assuming an exponential form for the reactor fission-spectrum neutrons, a model based upon the Hauser–Feshbach formalism was employed to calculate the relative population expected for each level using previously reported Jπ values. The validity of the model and the reliability of obtaining spin information is examined.

Inelastic Neutron Scattering With Fission Neutrons

1971 ◽  
Vol 49 (11) ◽  
pp. 1461-1468 ◽  
Author(s):  
L. Nichol ◽  
T. J. Kennett
Keyword(s):  
Simple Model ◽  
Neutron Scattering ◽  
Neutron Capture ◽  
Gamma Ray ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Doppler Broadening ◽  
Neutron Inelastic Scattering ◽  
Fission Spectrum ◽  
Fission Neutrons

A detailed investigation has been conducted of the usefulness of fission-spectrum neutrons for inelastic neutron scattering studies. A Ge(Li)–NaI(Tl) annular pair spectrometer was employed in conjunction with a versatile in-core irradiation facility to conduct this evaluation. The Doppler broadening and shift which were observed are quantitatively described through the use of a simple model developed for the system. The effectiveness of neutron filters for the reduction of capture reactions which normally produce unwanted background is also discussed. Results indicate that gamma-ray deexcitation, following neutron inelastic scattering, can be readily identified and quantitatively evaluated. During the course of this study resonant neutron capture in the 35 keV resonance of 28Al was observed thus indicating the feasibility of investigation of this type of reaction. Lifetime results for levels in 19F were obtained using a Doppler attenuation method and a possible discrepancy in (dE/dx) values was indicated.

scholarly journals Measurement of Gamma-Ray from Inelastic Neutron Scattering on 56Fe

2020 ◽  
Vol 239 ◽  
pp. 01036
Author(s):  
WANG Zhaohui ◽  
REN Jie ◽  
WU Hongyi ◽  
QIAN Jing ◽  
HUANG Hanxiong ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Cross Sections ◽  
Nuclear Reactor ◽  
Gamma Ray ◽  
Inelastic Neutron Scattering ◽  
Nuclear Reactors ◽  
Nuclear Data ◽  
Inelastic Neutron ◽  
Radiation Shielding ◽  
Loss Mechanism

In nuclear reactors, inelastic neutron scattering is a significant energy-loss mechanism which has deep impacts on designments of nuclear reactor and radiation shielding. Iron is an important material in reactor. However, for the existing nuclear data for iron, there exists an obvious divergence for the inelastic scattering cross sections and the related gamma production sections. Therefore the precise measurements are urgently needed for satisfying the demanding to design new nuclear reactors (fast reactors), Accelerator Driven Subcritical System (ADS), and other nuclear apparatus. In this paper, we report a new system with an array of HPGe detectors, electronics and acquisition system. Experiments had been carried out on three neutron facilities.

Gamma-ray spectra from inelastic neutron scattering

1966 ◽  
Vol 80 (1) ◽  
pp. 198-208 ◽  
Author(s):  
I. Bergqvist ◽  
B. Lundberg ◽  
L. Nilsson ◽  
N. Starfelt
Keyword(s):  
Neutron Scattering ◽  
Gamma Ray ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron

Elemental analysis by gamma-ray detection following inelastic neutron scattering

1978 ◽  
Vol 46 (2) ◽  
pp. 343-355 ◽  
Author(s):  
S. W. Yates ◽  
A. J. Filo ◽  
C. Y. Cheng ◽  
D. F. Coope
Keyword(s):  
Neutron Scattering ◽  
Elemental Analysis ◽  
Gamma Ray ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron
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