Centrifugal enrichment of chromium-50 for experiments on detecting solar neutrinos

Popov, G. E.; Prusakov, V.N.; Rudnev, A.; Tikhomirov, A. V.; Voronin, A. V.

doi:10.1016/0168-9002(95)00301-0

Cited by 10 publications

(6 citation statements)

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“…Enriched chromium was produced by the Kurchatov Institute by gas centrifugation of chromium oxyfluoride, CrO 2 F 2 [25,26]. The highly corrosive CrO 2 F 2 was then hydrolyzed to chromium oxide, Cr 2 O 3 .…”

Section: B Cr Preparationmentioning

confidence: 99%

Measurement of the response of a gallium metal solar neutrino experiment to neutrinos from a51Crsource

Abdurashitov¹,

Гаврин²,

Girin³

et al. 1999

Phys. Rev. C

268

165

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The neutrino capture rate measured by the Russian-American Gallium Experiment is well below that predicted by solar models. To check the response of this experiment to low-energy neutrinos, a 517 kCi source of 51 Cr was produced by irradiating 512.7 g of 92.4%-enriched 50 Cr in a high-flux fast neutron reactor. This source, which mainly emits monoenergetic 747-keV neutrinos, was placed at the center of a 13.1 tonne target of liquid gallium and the cross section for the production of 71 Ge by the inverse beta decay reaction 71 Ga(νe, e − ) 71 Ge was measured to be [5.55 ± 0.60 (stat) ± 0.32 (syst)] × 10 −45 cm 2 . The ratio of this cross section to the theoretical cross section of Bahcall for this reaction is 0.95 ± 0.12 (expt) +0.035 −0.027 (theor) and to the cross section of Haxton is 0.87 ± 0.11 (expt) ± 0.09 (theor). This good agreement between prediction and observation implies that the overall experimental efficiency is correctly determined and provides considerable evidence for the reliability of the solar neutrino measurement. PACS number(s): 26.65.+t, 13.15.+g, 95.85.Ry

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Section: B Cr Preparationmentioning

confidence: 99%

Measurement of the response of a gallium metal solar neutrino experiment to neutrinos from a51Crsource

Abdurashitov¹,

Гаврин²,

Girin³

et al. 1999

Phys. Rev. C

268

165

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“…The chromium used for this experiment was originally in the form of 93% enriched 50 Cr 2 O 3 [12,13]. Achieving high enrichment was an important consideration since it significantly increases the specific activity of the source [14].…”

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confidence: 99%

The Russian-American Gallium Experiment (SAGE) Cr Neutrino Source Measurement

Abdurashitov¹,

Гаврин²,

Girin³

et al. 1996

Phys. Rev. Lett.

302

153

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“…Such isotopic overlapping substantially limits the possibility of direct enrichment of iron isotopes with intermediate masses and heavy carbon and oxygen isotopes by using a centrifugal cascade. This limitation has been overcome due to the introduction of an additional stage into the process consisting of isotope exchange between Fe(CO) 5 molecules in so-called photo-reactors. The combination of isotope separation in gas centrifuges with isotope exchange reaction has allowed yielding in one process several highly enriched isotopes: Fe-57 (concentration Ͼ99%), C-13 and O-18 (with concentrations up to 80%) (10).…”

Section: Introductionmentioning

confidence: 99%

“…An industrial scale complex separation of iron, carbon and oxygen isotopes from iron pentacarbonyl, Fe(CO) 5 , realized at The Electrochemical Plant in the city of Krasnoyarsk can be considered to be the best achievement in the development of a centrifuge technology for enrichment of stable isotopes. Because all elements composing the Fe(CO) 5 molecule are polyisotopic (Fe contains 4, C-2, and O-3 isotopes), iron pentacarbonyl of natural isotope abundance represents a mixture of 284 molecular species with different degrees of isotope replacement.…”

Section: Introductionmentioning

confidence: 99%

“…Because all elements composing the Fe(CO) 5 molecule are polyisotopic (Fe contains 4, C-2, and O-3 isotopes), iron pentacarbonyl of natural isotope abundance represents a mixture of 284 molecular species with different degrees of isotope replacement. These species are distributed throughout 20 components with molecular masses ranging from 194 to 213.…”

Section: Introductionmentioning

confidence: 99%

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