Neutron energy spectra of different size 239PuBe(α,n) sources

Anderson, M. E.; Neff, R.A.

doi:10.1016/0029-554x(72)90781-1

Cited by 61 publications

(18 citation statements)

References 7 publications

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“…For evaluating the multiplicity of neutrons in PuBe neutron sources a simple calculation model is based on the assumption that the primary neutrons are randomly released from center of the source and induce secondary fissions in the material [4,5]. The model was developed for calculating the singles, S, and doubles, D, count rate of PuBe neutron sources measured by neutron coincidence collar.…”

Section: Parallelism Problemmentioning

confidence: 99%

Effect of double false pulses in calibrated neutron coincidence collar during measuring time-correlated neutrons from PuBe neutron sources

Nguyen

Huszti

Nguyen

2015

Nuclear Instruments and Methods in Physics Research Section B:

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Section: Parallelism Problemmentioning

confidence: 99%

Effect of double false pulses in calibrated neutron coincidence collar during measuring time-correlated neutrons from PuBe neutron sources

Nguyen

Huszti

Nguyen

2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…There are published articles [3,4] where one can see the experimental energy spectra of 239 PuBe neutron sources. However, these data have the too wide energy step and therefore can cause significant systematic errors in virtual experiment, which use them without preliminary processing.…”

Section: Eejp 2 2019mentioning

confidence: 99%

“…The special module contains description of neutron source. For developing of neutron source model the neutron source energy spectra from articles [3,4] were digitized. Spectra in these works have the form of a histogram with wide (data from [3]) and non-uniform (data from [4]) step of energy.…”

Section: Developing Of the Model For Fast Neutrons Transportmentioning

confidence: 99%

“…The obtained data was used as input for G4PrimaryGenerator class [7], which is mandatory in each computer program based on Geant4 toolkit. Figure 1 illustrates neutron source energy spectra modeled from two data sets [3,4]. Energy spectra in Figure 1 were obtained as a result of the implementation of the G4PrimaryGenerator module as well as the G4GeneralParticleSource module, which uses two data sets [3,4] as input data.…”

Section: Developing Of the Model For Fast Neutrons Transportmentioning

confidence: 99%

“…Energy spectra of primary neutrons ( Fig. 1) are results of work of G4PrimaryGenerator module, and were written in steps of 100 keV for each sets of initial data, obtained as a result of interpolation [3,4]. Thus, obtained data is given to a form convenient for further use by modules of our programs.…”

Section: Developing Of the Model For Fast Neutrons Transportmentioning

confidence: 99%

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GEANT4 Modeling Of Energy Spectrum Of Fast Neutrons Source For The Development Of Research Technique Of Heavy Scintillators

Malykhina

Lisovska

Shpagina

et al. 2019

EEJP

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The proposed work demonstrates the results of creating and investigating the mathematical model of the source of fast neutrons. Computer modeling of the energy spectrum of fast neutrons was carried out for 239PuBe neutron source. The model of the source of fast neutrons has been developed. Neutrons in this model have an energy spectrum from 100 keV to 11 MeV with 100 keV step. Simulation is performed by the Monte-Carlo method. The model carrier is a computer program developed in the C++ programming language in the Linux operating system environment, using the Geant4 toolkit. All necessary classes describing low-energy models were used for the simulation of the passage of neutrons through materials of detectors. Those take into account the elastic scattering, inelastic scattering, radiative capture and fission. We consider these processes because models of processes implemented in our software will be also used for other problems of neutrons transport, for example, for passing neutrons through various substances, and for conducting virtual laboratory works. The PhysicsList class of our program contains classes G4NeutronHPElastic, G4NeutronHPElasticData, G4NeutronHPInelastic, G4NeutronHPInelasticData, G4NeutronHPCapture, G4NeutronHPCaptureData, etc. based on the NeutronHP model for neutron interactions at low energy, as well as the neutron data library G4NDL4.5. Diagrams containing energy spectra of a source of fast neutrons modeled in two ways are presented in the paper. The analysis of the obtained energy spectra is carried out. Virtual nuclear physics experiments are carried out with the aim of testing the elaborated neutron-matter interaction model. The processes occurring in scintillator substances during the passage of fast neutrons through them, have been studied. 109 neutrons were used as primary particles emitted isotropically, and we used our simulation results of 239PuBe neutron source to describe the initial energy spectrum. The created model of 239PuBe neutron source can be used for the investigation of scintillation detectors Bi4Ge3O12, CdWO4, Gd2SiO5 and others, as well as studying their characteristics. Processes in heavy oxide scintillators substance during the registration of fast neutrons can be studied using the developed model. It is shown that for registration of the flow of neutrons from 239PuBe neutron source, using Bi4Ge3O12 or CdWO4 scintillators is more preferable. Results of the virtual nuclear physical experiments satisfy the published experimental data.

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4 Neutron sources and spectrometers

Pikelner¹

Low Energy Neutrons and Their Interaction With Nuclei and Matter. Part 1

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Neutron energy spectra of different size 239PuBe(α,n) sources

Cited by 61 publications

References 7 publications

Effect of double false pulses in calibrated neutron coincidence collar during measuring time-correlated neutrons from PuBe neutron sources

Effect of double false pulses in calibrated neutron coincidence collar during measuring time-correlated neutrons from PuBe neutron sources

GEANT4 Modeling Of Energy Spectrum Of Fast Neutrons Source For The Development Of Research Technique Of Heavy Scintillators

4 Neutron sources and spectrometers

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