Spin determination of resonance structure 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>235</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>+<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>n</mml:mi></mml:math>) below 25 keV

Moore, M. S.; Moses, J. D.; Keyworth, G.A.; Dabbs, J.W.T.; Hill, N.W.

doi:10.1103/physrevc.18.1328

Cited by 57 publications

(29 citation statements)

References 21 publications

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“…The good agreement suggests that only a few weak resonances might have been missed in 187 Os. This has been confirmed by means of the missing level estimator [28] to obtain the average reduced neutron widths.…”

Section: Statistical Analysis and Average Quantitiesmentioning

confidence: 54%

Neutron physics of the Re/Os clock. III. Resonance analyses and stellar (n,γ) cross sections ofOs186,187,1

Fujii¹,

Mosconi²,

Mengoni³

et al. 2010

Phys. Rev. C

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Neutron resonance analyses have been performed for the capture cross sections of 186 Os, 187 Os, and 188 Os measured at the n TOF facility at CERN. Resonance parameters have been extracted up to 5, 3, and 8 keV, respectively, using the SAMMY code for a full R-matrix fit of the capture yields. From these results average resonance parameters were derived by a statistical analysis to provide a comprehensive experimental basis for modeling of the stellar neutron capture rates of these isotopes in terms of the Hauser-Feshbach statistical model. Consistent calculations for the capture and inelastic reaction channels are crucial for the evaluation of stellar enhancement factors to correct the Maxwellian averaged cross sections obtained from experimental data for the effect of thermally populated excited states. These factors have been calculated for the full temperature range of current scenarios of s-process nucleosynthesis using the combined information of the experimental data in the region of resolved resonances and in the continuum. The consequences of this analysis for the s-process component of the 187 Os abundance and the related impact on the evaluation of the time duration of galactic nucleosynthesis via the Re/Os cosmochronometer are discussed.

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Section: Statistical Analysis and Average Quantitiesmentioning

confidence: 54%

Neutron physics of the Re/Os clock. III. Resonance analyses and stellar (n,γ) cross sections ofOs186,187,1

Fujii¹,

Mosconi²,

Mengoni³

et al. 2010

Phys. Rev. C

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show abstract

“…The intermediate structures are more likely present in the 235 U fission data. 3,7,15,17 The high-resolution measurements of by Beer et al 15 showed structures correlated with structures in Perez et al 18 fission data. The parameters of the intermediate structures in the fission data have the statistical properties of the Class-II resonances (levels of the second well of a double humped fission barrier) with an average spacing of about 500 eV 15 which is 1000 times larger than the average spacing of the Class-I resonances.…”

Section: The Sammy/fitacs Statistical Model Codementioning

confidence: 70%

NEUTRON TOTAL CROSS SECTIONS OF 235U FROM TRANSMISSION MEASUREMENTS IN THE ENERGY RANGE 2 keV to 300 keV AND STATISTICAL MODEL ANALYSIS OF THE DATA

Derrien¹

2000

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Section: The Sammy/fitacs Statistical Model Codementioning

confidence: 71%

Neutron Total Cross Sections of {sup 235}U From Transmission Measurements in the Energy Range 2 keV to 300 keV and Statistical Model Analysis of the Data

Derrien¹,

Harvey²,

Larson³

et al. 2000

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Spin determination of resonance structure in (U235+n) below 25 keV

Cited by 57 publications

References 21 publications

Neutron physics of the Re/Os clock. III. Resonance analyses and stellar (n,γ) cross sections ofOs186,187,1

Neutron physics of the Re/Os clock. III. Resonance analyses and stellar (n,γ) cross sections ofOs186,187,1

NEUTRON TOTAL CROSS SECTIONS OF 235U FROM TRANSMISSION MEASUREMENTS IN THE ENERGY RANGE 2 keV to 300 keV AND STATISTICAL MODEL ANALYSIS OF THE DATA

Neutron Total Cross Sections of {sup 235}U From Transmission Measurements in the Energy Range 2 keV to 300 keV and Statistical Model Analysis of the Data

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