Subthreshold Neutron-Induced Fission in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">U</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>238</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Silbert, M.G.; Bergen, D.W.

doi:10.1103/physrevc.4.220

Cited by 6 publications

(13 citation statements)

References 2 publications

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“…This difference is measureable down to 10 eV. An anisotropy has already been reported for 25 keV neutrons by Schroder et al 1 who made measurements using an ironfiltered neutron beam. In the 10 eV to 10 keV energy region, our results give an energy dependence for the alpha to triton ratio at 180° (or triton to alpha ratio at 0°) of the form 1 + cE 0 • 54 where cis ~0.005 and E is the neutron energy in eV.…”

Section: Scattering and Reactions Asupporting

confidence: 62%

“…Th1s result 1s cons1stent with photonuclear polarization and angular distribution studies. 1 We observed ~100 resonances between .7 MeV and 1.6 MeV, about twice B! many as were seen In a previous experiment 1 carried out with 7 Li{p,n) neutrons.…”

Section: Neutron Total Cross Sections and Resonance Parameters Of mentioning

confidence: 70%

“…Recent thick sample measurements on sodium minima by Brown et al 2 show a significant discrepancy with the present ENDF/B-IV evaluation 3 for the 300-keV resonance. The evaluation in this region is based on the data of Cierjacks et al, 1 which show a much sharper minimum than revealed by the measurement of Brown. In addition to the 300-keV resonance problem, no high resolution total cross section data were available from~ 40 keV to 300 keV, leading to large uncertainty estimates for this energy region in the evaluation.…”

Section: R Resonance Neutron Capture By 209 Bi * (R Macklin and J mentioning

confidence: 99%

“…The transmitted beam was detected by a NE-110 proton recoil detector located at the 200-m flight path of the Oak Ridge Electron Linear Accelerator (ORELA). A 5-ns electron beam burst width was used, with a repetition rate of 800 sec- 1 The data were corrected for dead-time effects (maximum of 9% in the cro5s section at i.l MeV), and backgt•ound (varying from 0.1-0.2% between 100 keV and 2 MeV, rising to 1% at 8 MeV). The 50,000 channels of transmission data were suitably averaged to improve counting statistics while preserving the resonance structure and were then converted to cross section versus energy.…”

Section: R Resonance Neutron Capture By 209 Bi * (R Macklin and J mentioning

confidence: 99%

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Status report to the ERDA Nuclear Data Committee

Perey¹,

Gentry²

1976

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The report was mostly generated through a review of abstracts of work completed to the point of being subjected to some form of publication in the open literature, formal ORNL reports, ORNL technical memoranda, progress reports, or being presented at technical conferences. As much as possible we have reproduced the complete abstract of the original publication with only minor editing. In a few cases progress reports were written specifically for this publication. The authors have selected the materials to be included in this report on the basis of perceived interests of ERDA-NDC members and cannot claim completeness. OAK RIDGE NATIONAL LABORATORY A. CROSS SECTION MEASUREMENTS 1. Gamma-Ray Production Data During the reporting period the following gamma-ray production data obtained at ORELA were released: a. Production of Low Energy Gamma Rays by Neutron Interactions with Fluorine for Incident Neutron Ener ies Between 0.

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Section: Scattering and Reactions Asupporting

confidence: 62%

Section: Neutron Total Cross Sections and Resonance Parameters Of mentioning

confidence: 70%

Section: R Resonance Neutron Capture By 209 Bi * (R Macklin and J mentioning

confidence: 99%

Section: R Resonance Neutron Capture By 209 Bi * (R Macklin and J mentioning

confidence: 99%

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Status report to the ERDA Nuclear Data Committee

Perey¹,

Gentry²

1976

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“…*Work supported by the U.S. Atomic Energy Commission. 1 Subthreshold fission is observed in 238 U(«,/) at 0.720, 1.210, 2.5, 7.5, 11, 15, 27, and 35 keV. Fission widths are obtained for the resonances at 720 and 1210 eV.…”

mentioning

confidence: 92%

Subthreshold Fission Induced by Neutrons onU238

Block

Hockenbury

Slovacek³

et al. 1973

Phys. Rev. Lett.

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The reactions 12 C( 10 B, 7 Li) 15 0 and 12 C( 10 B, 7 Be) 15 N were investigated at 100 MeV incident energy. These analog reactions show almost identical features, as expected, because the incident energy is much higher than the Coulomb barriers. Therefore, these reactions represent a powerful reaction-mechanism-independent method of finding corresponding analog states in the residual nuclei. Furthermore, the data are consistent with the assumption that the processes are direct three-nucleon transfers populating highspin states. We identify the states having two-particle, three-hole and three-particle, four-hole configurations coupled to high spins.

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