States in 8Li from an R-matrix analysis of 7Li(n, n)7Li and 7Li(n, n′)7Li ∗ (0.478, 4.63) measurements

Knox, H.D.; Lane, R.O.

doi:10.1016/0375-9474(81)90216-5

Cited by 27 publications

(11 citation statements)

References 19 publications

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“…(This point is recognized in Ref. [18],where it is remarked that these reduced widths exceed the Wigner limit. ) The parameters of Ref.…”

Section: Thermal-neutron Capturementioning

confidence: 75%

“…The parameters of Ref. [18], therefore, appear unphysical in the context of properly explaining the data in the low-energy region. This situation has been adjusted in a later, mainly theoretical, analysis by Knox, Resler, and Lane [19] in which the properties of the A-matrix states have been calculated from the shell model and only a few adjust- FICx.…”

Section: Thermal-neutron Capturementioning

confidence: 96%

“…The parameter A is, in fact, included in the detailed analyses presented below. ) A very comprehensive A-matrix fit to these data up to 8 MeV has already been made by Knox and Lane [18].…”

Section: Thermal-neutron Capturementioning

confidence: 98%

“…state width (allowing for the different channel radius employed in the analysis of Ref. [18]). There is also a second 2 state at 6.60 MeV with a reduced width of 1.2 MeV.…”

Section: Thermal-neutron Capturementioning

confidence: 99%

“…4 above about 1.5 MeV is explained in Ref. [18] by the inclusion of J =0+ (l =1) and 0 (l =2) levels, but here we do not seek to establish a detailed fit to these much higher energies [see also Fig. 5(c)] and do not include them in the analysis.…”

Section: Thermal-neutron Capturementioning

confidence: 99%

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Direct and valence neutron capture byLi7

1991

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We have measured the cross section for neutron radiative capture by Li at thermal neutron energy as 45.4+3.0 mb. We have compared this value, and the available fast-neutron-capture cross-section data on Li, with directand valence-capture theory. The mechanism of direct capture involving simple neutron-orbital transitions within a potential well can adequately account for the magnitude of the thermal-neutron-capture cross sections and the shape of the fast-neutron-capture cross sections. We recommend that the capture cross sections from the theoretical calculation, instead of those from a recent measurement, be used for nuclear astrophysics calculations. If the fast-neutron-capture data are normalized at 25 keV to the theoretical value, the magnetic-dipole (M 1) radiation width of the 255-keV p-wave resonance can be deduced. It is in agreement with the value calculated from a valence theory for M1 capture, thus lending support for this neutron-capture mechanism as an important one, at least for light nuclei. We also find some evidence from our analysis of the total cross-section data for a possible energy dependence of the potential required to describe the almost pure single-particle s-wave resonances underlying the Li cross section.

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“…(This point is recognized in Ref. [18],where it is remarked that these reduced widths exceed the Wigner limit. ) The parameters of Ref.…”

Section: Thermal-neutron Capturementioning

confidence: 75%

Section: Thermal-neutron Capturementioning

confidence: 96%

“…The parameter A is, in fact, included in the detailed analyses presented below. ) A very comprehensive A-matrix fit to these data up to 8 MeV has already been made by Knox and Lane [18].…”

Section: Thermal-neutron Capturementioning

confidence: 98%

“…state width (allowing for the different channel radius employed in the analysis of Ref. [18]). There is also a second 2 state at 6.60 MeV with a reduced width of 1.2 MeV.…”

Section: Thermal-neutron Capturementioning

confidence: 99%

Section: Thermal-neutron Capturementioning

confidence: 99%

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