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Measurements of neutron yields and spatial distributions in U/Pb, Pb and Hg thick targets bombarded by 0.5 and protons

Guo, S.-L. and Li, L. and Shen, Q.-B. and Shi, Y.-Q. and Brandt, R. and Vater, P. and Wan, J. S. and Ensinger, W. and Kulakov, B. A. and Krivopustov, M. I. and Sosnin, A. N. and Bradnova, V. (2001):
Measurements of neutron yields and spatial distributions in U/Pb, Pb and Hg thick targets bombarded by 0.5 and protons.
In: Radiation Measurements, Elsevier, pp. 301-304, 34, (1-6), ISSN 13504487, [Online-Edition: http://dx.doi.org/10.1016/S1350-4487(01)00172-X],
[Article]

Abstract

Measurements have been carried out on neutron yields and spatial distributions in U/Pb, Pb and Hg thick targets and the surrounding paraffin moderators bombarded by 0.533 and View the MathML source protons. CR-39 detectors were deployed on the surfaces of targets and moderators to record the neutrons produced in the targets. The measurements show that:

(1) Neutron yield of Hg target is less than U/Pb and Pb targets on bombardment by protons. Neutron yield ratio of U/Pb and Pb to Hg target are 2.01±0.10 and 1.76±0.33, respectively. This means that Hg target is less preferable in order to get more secondary neutrons.

(2) Neutron yields along View the MathML source thick targets decrease approximately linearly with the thickness through which the incident protons have penetrated. The lower the incident energy, the steeper the decrease of neutron yield.

(3) Secondary neutron spectra for different incident energies are close to each other, while some differences have been observed.

Item Type: Article
Erschienen: 2001
Creators: Guo, S.-L. and Li, L. and Shen, Q.-B. and Shi, Y.-Q. and Brandt, R. and Vater, P. and Wan, J. S. and Ensinger, W. and Kulakov, B. A. and Krivopustov, M. I. and Sosnin, A. N. and Bradnova, V.
Title: Measurements of neutron yields and spatial distributions in U/Pb, Pb and Hg thick targets bombarded by 0.5 and protons
Language: English
Abstract:

Measurements have been carried out on neutron yields and spatial distributions in U/Pb, Pb and Hg thick targets and the surrounding paraffin moderators bombarded by 0.533 and View the MathML source protons. CR-39 detectors were deployed on the surfaces of targets and moderators to record the neutrons produced in the targets. The measurements show that:

(1) Neutron yield of Hg target is less than U/Pb and Pb targets on bombardment by protons. Neutron yield ratio of U/Pb and Pb to Hg target are 2.01±0.10 and 1.76±0.33, respectively. This means that Hg target is less preferable in order to get more secondary neutrons.

(2) Neutron yields along View the MathML source thick targets decrease approximately linearly with the thickness through which the incident protons have penetrated. The lower the incident energy, the steeper the decrease of neutron yield.

(3) Secondary neutron spectra for different incident energies are close to each other, while some differences have been observed.

Journal or Publication Title: Radiation Measurements
Volume: 34
Number: 1-6
Publisher: Elsevier
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 26 Jun 2012 07:46
Official URL: http://dx.doi.org/10.1016/S1350-4487(01)00172-X
Identification Number: doi:10.1016/S1350-4487(01)00172-X
Funders: This work was supported by National Natural Science Foundation of China (NNSFC) through project No. 19975071 and the Scientific Collaboration between China–Germany–Russia on Nuclear Energy and Transmutation.
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