scholarly journals GAMMA RAYS FOLLOWING NEUTRON CAPTURE IN IRON, SODIUM, AND THORIUM.

1968 ◽  
Author(s):  
O.A. Wasson ◽  
J.B. Garg ◽  
R.E. Chrien ◽  
M.R. Bhat
Keyword(s):  
Gamma Rays ◽  
Neutron Capture

Analysis of primary electric dipole gamma rays from slow-neutron capture by Ca isotopes

1987 ◽  
Vol 36 (2) ◽  
pp. 533-542 ◽  
Author(s):  
S. Kahane ◽  
J. E. Lynn ◽  
S. Raman
Keyword(s):  
Gamma Rays ◽  
Electric Dipole ◽  
Neutron Capture ◽  
Slow Neutron

Thermal-neutron capture gamma rays from the 27Al(n, γ)28Al reaction

1969 ◽  
Vol 126 (2) ◽  
pp. 392-400 ◽  
Author(s):  
R. Hardell ◽  
S.O. Idetjärn ◽  
H. Ahlgren
Keyword(s):  
Thermal Neutron ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Thermal Neutron Capture

Prompt Gamma Rays Emitted from the Neutron Capture Reaction of 74Ge

2011 ◽  
Vol 59 (2(3)) ◽  
pp. 1832-1835 ◽  
Author(s):  
K. Y. Hara ◽  
T. Kin ◽  
M. Oshima ◽  
S. Nakamura ◽  
A. Kimura ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Neutron Capture ◽  
Prompt Gamma ◽  
Neutron Capture Reaction ◽  
Capture Reaction

scholarly journals THERMOCOAX rhodium SPND sensitivity dispersion and validation of the sensitivity calculation model

2020 ◽  
Vol 225 ◽  
pp. 04015
Author(s):  
L. Vermeeren ◽  
W. Leysen ◽  
L. Pichon ◽  
V. Salou ◽  
G. Helleux
Keyword(s):  
Gamma Rays ◽  
Neutron Capture ◽  
Characteristic Time ◽  
Thermal Neutron Flux ◽  
Calculation Model ◽  
Delayed Response ◽  
Neutron Detectors ◽  
Recorded Data ◽  
Self Powered ◽  
Beta Emission

This paper describes the neutron irradiation tests of 7 THERMOCOAX Self-Powered Neutron detectors (SPNDs) in the BR1 reactor at SCK•CEN. The SPNDs were fabricated according to the same specifications, but from different fabrication batches. The SPND signals were recorded during stepwise power-up of the reactor, proving the linearity of the SPND response within a wide thermal neutron flux range: from as low as 0.8·109 n/(cm2) to 2.6·1011 n/(cm2s). Intercomparison of the SPND signals shows a very small spread, confirming the repeatability of the THERMOCOAX fabrication processes. The overall neutron sensitivities of the seven SPNDs agreed within a 1% margin. The experimental data were analyzed in terms of prompt and various delayed responses. Prompt contributions to the signal are due to external gamma induced processes and to processes involving gamma rays emitted instantaneously upon neutron capture. The main contribution in a rhodium SPND is due to activation of the rhodium emitter and beta emission during decay of the activated rhodium and leads to a delayed response with a characteristic time of a few minutes. Activation and subsequent beta decay in other materials present in the SPND lead to additional minor delayed signal contributions. The partial SPND sensitivities due to all these processes were calculated using an MCNPX based model and were compared with experimental sensitivities based on the recorded data. The results were in fair agreement; for the overall SPND neutron sensitivity an agreement within a 1% margin was achieved.

Comparison of MC Geant4 simulation with the measurements of gamma photons produced by neutrons

2019 ◽  
Vol 34 (06) ◽  
pp. 1950046
Author(s):  
M. Kasztelan ◽  
K. Jȩdrzejczak ◽  
J. Szabelski
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Gamma Rays ◽  
Neutron Capture ◽  
Germanium Detector ◽  
Gamma Line ◽  
Geant4 Simulation ◽  
Experimental Setup ◽  
Hydrogen Line

In this work, we have focused on results of measurements of the hydrogen line 2223 keV and compared them with the results of Geant4 simulations. The paraffin containing hydrogen was irradiated by neutrons produced by the weak AmBe source. Produced gammas were measured with the germanium detector. The experimental setup was placed inside a carbon chamber which provided the shielding from the external neutrons. The measurements were performed for different amounts of paraffin. The processes playing a role in the description of our measurements are transport and moderation of neutrons, production of gamma rays in neutron-hydrogen interactions, transport and detection of gamma rays. It has been shown that the correctly carried out Monte Carlo simulations reproduced the measured values of the intensity of the observed gamma line 2223 keV from the neutron capture on hydrogen. The absorption of gamma rays is also described correctly. This has been shown in comparing the measurements of gamma line 322 keV from [Formula: see text]Pb with the simulations.

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