Calculated differential secondary-particle production cross sections after nonelastic neutron interactions with carbon and oxygen between 15 and 60 MeV

Brenner, D. J.; Prael, R. E.

doi:10.1016/0092-640x(89)90027-2

Cited by 29 publications

(70 citation statements)

References 16 publications

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“…For instance, following preequilibrium emission of a particle other than a neutron, 3a break-up cannot occur. Our results support Brenner and Prael's view [41] that the ENDF/B-V evaluated alpha production at 20 MeV is too high.…”

Section: Inclusive Production Cross Sectionssupporting

confidence: 90%

“…The good agreement that is seen between our calculations and the measurements is important since this reaction channel makes up such a large fraction of the total nonelastic cross section. Our calculation of this channel agrees with the data better than that of Brenner and Prael [41], which lies below the measurements. This is the main reason for the fact that our total nonelastic cross section at 20 MeV is 7 % higher than Brenner and Prael's [41].…”

Section: Comparison With (N N'3a) Measurementssupporting

confidence: 64%

“…Our calculation of this channel agrees with the data better than that of Brenner and Prael [41], which lies below the measurements. This is the main reason for the fact that our total nonelastic cross section at 20 MeV is 7 % higher than Brenner and Prael's [41]. The Antolkovic measurement also provided information on the extent to which the (n, n'3a) reaction proceeds via the ground-state of 'Be.…”

Section: Comparison With (N N'3a) Measurementssupporting

confidence: 64%

“…Our treatment of equilibrium emission differs from that of Brenner and Prael [17,lo], who used a Fermi break-up model. That approach partitions the decay fragments statistically according to their phase-space probability and allows for three-body (and higher order) fragmentation mechanisms.…”

Section: Hauser-feshbach Theorymentioning

confidence: 99%

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Evaluated cross-section libraries and kerma factors for neutrons up to 100 MeV on {sup 12}C

Chadwick¹,

Blann²,

Cox³

et al. 1995

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DIscLAlMERThis document was pwpared s an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the UNversity of California nor any of their employees, makes any warranty, expres or implied, or aseumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference Abstract A program is being carried out at Lawrence Livermore National Laboratory to develop high-energy evaluated nuclear data libraries for use in Monte Carlo simulations of cancer radiation therapy. In this report we describe evaluated cross sections and kerma factors for neutrons with incident energies up to 100 MeV on 12C; in subsequent reports we shall describe our high-energy libraries for neutrons on I4N, l60, 31P and 40Ca, as well as accelerator collimator and shielding materials. The aim of this effort is to incorporate advanced nuclear physics modeling methods, with new experimental measurements, to generate cross section libraries needed for an accurate simulation of dose deposition in fast neutron therapy.The evaluated libraries are based mainly on nuclear model calculations, benchmarked to experimental measurements where they exist. We use the GNASH code system, which includes Hauser-Feshbach, preequilibrium, and direct reaction mechanisms. The libraries tabulate elastic and nonelastic cross sections, angle-energy correlated production spectra for light ejectiles with A54, and kinetic energies given to light ejectiles and heavy recoil fragments. The major steps involved in this effort are: (1) development and validation of nuclear models for incident energies up to 100 MeV; (2) collation of experimental measurements, including new results from Louvain-la-Nueve and Los Alamos; (3) extension of the Livermore ENDL formats for representing highenergy data; (4) calculation and evaluation of nuclear data; and (5) validation of the libraries. We describe the evaluations in detail, with particu1a.r emphasis on our new high-energy modeling developments. Our evaluations agree well with experimental measurements of integrated and differential cross sections. We compare our results with the recent ENDF/B-VI cvaluatioii which extends up to 32 MeV. We also compare kerma factors resulting from our evaluated microscopic cross sections with measurements, providing an important integral benchmarking of the libraries. The evaluated libraries are described and illustrated in detail. bmJBVnON OF MIS.. Contents AbstractA program is being carried out at Lawrence Livermore National Laboratory to develop high-energy evaluated nuclear data libraries for use in Monte Carlo simulations of cancer radiation therapy. In this report we describe evaluated cross sections and kerma factors for neutrons with incident energies up to 100 MeV on 12C; in subsequent reports we shall describe our high-energy libraries for neutrons on I4N, l60, 31P and 40Ca, ...

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Section: Inclusive Production Cross Sectionssupporting

confidence: 90%

Section: Comparison With (N N'3a) Measurementssupporting

confidence: 64%

Section: Comparison With (N N'3a) Measurementssupporting

confidence: 64%

Section: Hauser-feshbach Theorymentioning

confidence: 99%

See 2 more Smart Citations

Evaluated cross-section libraries and kerma factors for neutrons up to 100 MeV on {sup 12}C

Chadwick¹,

Blann²,

Cox³

et al. 1995

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“…Incident energies of 27 MeV (lst row), 40 MeV (2nd row), 60 MeV (third row), and 70 MeV (fourth row) are shown. The solid line shows the evaluated result [12] from GNASH model calculations transformed into the laboratory frame of reference; the dashed line shows the results from Brenner and Prael's calculations [38]. It is evident that the evaluated result is in good agreement with the experimental data [17,[19][20][21], with the exception of the 70 MeV proton production where the calculation underpredicts the measurement.…”

Section: A Neutron Cross Sections and Kerma Coefficientsmentioning

confidence: 75%

Neutron, proton, and photonuclear cross-sections for radiation therapy and radiation protection

Chadwick¹

1998

Radiation and Environmental Biophysics

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Les Afamos Natlonsl Moratory, an affirmative astiedequal oppertun"kyempleyer, is operated by the Unheraiiy of CMomia for the U.S. Deparbnent of Ene&y under mntract W-740MNG-36. By accaptanca of this article, the publisher rewgnfzes that the U.S. Gwemment retafns a nonexslustie, reya~free license to pubfii or repreduce the pubfried form of thii scmtributien, or to allow others 10 do SO,for U.S. Government purposes. The k Afamos National Laberatmy requests that the pubfkher identify this article aa wxk perfonnad under the auspicas of the U.S. AbstractWe review recent work at Los Alamos to evaluate neutron, proton, and photonuclear cross sections up to 150 MeV (to 250 MeV for protons), based on experimental data and nucIear model calculations. These data are represented in the ENDF format and can be used in computer codes to simulate radiation transport. They permit calculations of absorbed dose in the body from therapy beams, and through use of kerma coefficients allow absorbed dose to be estimated for a given neutron energy distribution. For radiation protection, these data can be used to determine shielding requirements in accelerator environments, and to calculate neutron, proton,~-ray, and radionuclide production. Illui%rative comparisons of the evaluated cross section and kerma coefficient data with measurements are given.

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EXPERIMENTAL CROSS SECTIONS FOR LIGHT-CHARGED PARTICLE PRODUCTION INDUCED BY NEUTRONS WITH ENERGIES BETWEEN 25 AND 65 MeV INCIDENT ON OXYGEN

Benck

Slypen

Meulders

et al. 1999

Atomic Data and Nuclear Data Tables

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Calculated differential secondary-particle production cross sections after nonelastic neutron interactions with carbon and oxygen between 15 and 60 MeV

Cited by 29 publications

References 16 publications

Evaluated cross-section libraries and kerma factors for neutrons up to 100 MeV on {sup 12}C

Evaluated cross-section libraries and kerma factors for neutrons up to 100 MeV on {sup 12}C

Neutron, proton, and photonuclear cross-sections for radiation therapy and radiation protection

EXPERIMENTAL CROSS SECTIONS FOR LIGHT-CHARGED PARTICLE PRODUCTION INDUCED BY NEUTRONS WITH ENERGIES BETWEEN 25 AND 65 MeV INCIDENT ON OXYGEN

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