A Bonner sphere is a device used to determine the energy spectrum of a neutron beam.[1] The method was first described in 1960 by Rice University's Bramblett, Ewing and Tom W. Bonner[2] and employs thermal neutron detectors embedded in moderating spheres of different sizes. Comparison of the neutrons detected by each sphere allows accurate determination of the neutron energy. This detector system utilizes a few channel unfolding techniques to determine the coarse, few group neutron spectrum. The original detector system was capable of measuring neutrons between thermal energies up to ~20 MeV. These detectors have been modified to provide additional resolution above 20 MeV to energies up to 1 GeV.[3]
Because of the complexity with which neutrons interact with the environment, precise determination of the neutron energy is quite difficult. Bonner sphere spectroscopy (BSS) is one of the few methods that provide an accurate measure of the neutron spectrum.
Remballedit
A single Bonner sphere of an appropriate size can be used for dosimetry, as the sensitivity of the detector will approximate the radiation weighting factor across a range of neutron energies. Such Bonner spheres are sometimes known as a remball.
^Esposito, A.; Nandy, M. (2004). "Measurement and unfolding of neutron spectra using Bonner spheres". Radiation Protection Dosimetry. 110 (1–4): 555–558. doi:10.1093/rpd/nch385. ISSN 0144-8420. PMID 15353708.
^Bramblett, Richard L.; Ewing, Ronald I.; Bonner, T.W. (1960). "A new type of neutron spectrometer". Nuclear Instruments and Methods. 9 (1): 1–12. Bibcode:1960NucIM...9....1B. doi:10.1016/0029-554X(60)90043-4. ISSN 0029-554X.
^Burgett, Eric (May 1, 2008). "A Broad Spectrum Neutron Spectrometer Utilizing a Bonner Sphere Extension" (PDF). {{cite journal}}: Cite journal requires |journal= (help)
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bonner, sphere, device, used, determine, energy, spectrum, neutron, beam, method, first, described, 1960, rice, university, bramblett, ewing, bonner, employs, thermal, neutron, detectors, embedded, moderating, spheres, different, sizes, comparison, neutrons, d. A Bonner sphere is a device used to determine the energy spectrum of a neutron beam 1 The method was first described in 1960 by Rice University s Bramblett Ewing and Tom W Bonner 2 and employs thermal neutron detectors embedded in moderating spheres of different sizes Comparison of the neutrons detected by each sphere allows accurate determination of the neutron energy This detector system utilizes a few channel unfolding techniques to determine the coarse few group neutron spectrum The original detector system was capable of measuring neutrons between thermal energies up to 20 MeV These detectors have been modified to provide additional resolution above 20 MeV to energies up to 1 GeV 3 Contents 1 Bonner sphere spectroscopy 2 Remball 3 See also 4 ReferencesBonner sphere spectroscopy editBecause of the complexity with which neutrons interact with the environment precise determination of the neutron energy is quite difficult Bonner sphere spectroscopy BSS is one of the few methods that provide an accurate measure of the neutron spectrum Remball editA single Bonner sphere of an appropriate size can be used for dosimetry as the sensitivity of the detector will approximate the radiation weighting factor across a range of neutron energies Such Bonner spheres are sometimes known as a remball See also editNeutron detectionReferences edit Esposito A Nandy M 2004 Measurement and unfolding of neutron spectra using Bonner spheres Radiation Protection Dosimetry 110 1 4 555 558 doi 10 1093 rpd nch385 ISSN 0144 8420 PMID 15353708 Bramblett Richard L Ewing Ronald I Bonner T W 1960 A new type of neutron spectrometer Nuclear Instruments and Methods 9 1 1 12 Bibcode 1960NucIM 9 1B doi 10 1016 0029 554X 60 90043 4 ISSN 0029 554X Burgett Eric May 1 2008 A Broad Spectrum Neutron Spectrometer Utilizing a Bonner Sphere Extension PDF a href Template Cite journal html title Template Cite journal cite journal a Cite journal requires journal help nbsp This particle physics related article is a stub You can help Wikipedia by expanding it vte nbsp This spectroscopy related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Bonner sphere amp oldid 1098250118, wikipedia, wiki, book, books, library,
