A facility to measure fast neutron cross sections at energies around 20 MeV

Morales, J. R.; Figueroa, Lucila; Martens, P. C. H.; Romero, J. L.

doi:10.1016/0168-9002(91)90442-s

Cited by 5 publications

(3 citation statements)

References 6 publications

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“…7 and 8. The calculated neutron total cross sections computed with GS2 are in good agreement with the experimental data [36][37][38] except those for the incident energy from 20 to 40 MeV where the present results are lower than experimental data. The calculated neutron total cross section computed with Ska is in good agreement with the experimental data for the incident energy below 55 MeV, where for higher energies, the magnitudes are larger than the experimental data.…”

Section: Results and Analysessupporting

confidence: 84%

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Isospin dependent nucleon-nucleus optical potential with Skyrme interactions

2009

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In this paper, the isospin dependent nucleon-nucleus optical potential theory is introduced on the basis of the effective Skyrme interactions. From the view of the many-body theory, the nucleon optical potential can be identified with the mass operator of the one-particle Green function. The first and second order mass operators of the one particle Green function in nuclear matter are derived, and the real and imaginary parts of the optical potential for finite nuclei are obtained as usual by applying a local density approximation. Our results, in most cases, can be derived and expressed analytically. From an extensive comparison with experimental data of various quantities of interests, it is concluded that for certain versions of Skyrme interactions without parameter adjusting the agreement between theory and experiments can be obtained satisfactorily. We define the ratio of the difference and summation of the neutron and proton nonelastic cross sections as the isospin effect value. The calculated results show that the isopin effect value decreases as the incident energy increases and increases as the asymmetric parameter α 0 = (N -Z)/A of the target nucleus increases.

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Section: Results and Analysessupporting

confidence: 84%

“…Calculated neutron total cross sections compared with experimental data[36][37][38] for n + 27 Al reaction. The theoretical values computed with GS2 are shown as the solid curve, those computed with Ska are shown as the dashed curve, and those computed with SII are shown as the dot-dashed curve.FIG.…”

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confidence: 99%

Isospin dependent nucleon-nucleus optical potential with Skyrme interactions

2009

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“…Total, elastic and inelastic cross sections have been computed by means of an optical potential whose quality is shown in fig. 10, where the total and total inelastic cross sections are compared with selected experimental data for both 12 C and nat C. The theoretical total cross section is in excellent agreement with measurements on 12 C -such as those from Taylor and Wood [35], Bowen et al [36], Morales et al [37] -and also with recent measurements on nat C, extended over the whole energy range of interest, among which are those from Shane et al [38] and Abfalterer et al [39]. In addition, fig.…”

Section: Talys-1calculationsmentioning

confidence: 57%

Integral measurement of the $^{12}$C(n,p)$^{12}$B reaction up to 10 GeV

Žugec,

Colonna,

Bosnar

et al. 2016

Preprint

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The integral measurement of the 12 C(n,p) 12 B reaction was performed at the neutron time of flight facility n TOF at CERN. The total number of 12 B nuclei produced per neutron pulse of the n TOF beam was determined using the activation technique in combination with a time of flight technique. The cross section is integrated over the n TOF neutron energy spectrum from reaction threshold at 13.6 MeV to 10 GeV. Having been measured up to 1 GeV on basis of the 235 U(n,f) reaction, the neutron energy spectrum above 200 MeV has been reevaluated due to the recent extension of the cross section reference for this particular reaction, which is otherwise considered a standard up to 200 MeV. The results from the dedicated GEANT4 simulations have been used to evaluate the neutron flux from 1 GeV up to 10 GeV. The experimental results related to the 12 C(n,p) 12 B reaction are compared with the evaluated cross sections from major libraries and with the predictions of different GEANT4 models, which mostly underestimate the 12 B production. On the contrary, a good reproduction of the integral cross section derived from measurements is obtained with TALYS-1.6 calculations, with optimized parameters.

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Calculation and evaluations for n+63,65,nat.Cu reactions

Han

Liang

et al. 2011

Annals of Nuclear Energy

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A facility to measure fast neutron cross sections at energies around 20 MeV

Cited by 5 publications

References 6 publications

Isospin dependent nucleon-nucleus optical potential with Skyrme interactions

Isospin dependent nucleon-nucleus optical potential with Skyrme interactions

Integral measurement of the $^{12}$C(n,p)$^{12}$B reaction up to 10 GeV

Calculation and evaluations for n+63,65,nat.Cu reactions

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