Total photoabsorption cross sections for high-Z ELEMENTS in the energy range 7–20 MeV

Gurevich, G. M.; Lazareva, L.E.; Mazur, V.M.; Merkulov, S.Yu.; Solodukhov, G. V.

doi:10.1016/0375-9474(80)90124-4

Cited by 13 publications

(8 citation statements)

References 7 publications

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“…The total nuclear photoabsorption cross section of 197 Au was measured at the synchrotron facility of the Institute of Nuclear Research (Moscow) by Gurevich et al [34]. Even though the data agree with the measurements by Veyssiere et al, they exhibit significant scatter (Fig.…”

Section: A Activation Yield : Comparison With Previous Experimentssupporting

confidence: 56%

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Photoactivation experiment onAu197and its implications for the dipole strength in heavy nuclei

et al. 2008

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The 197 Au(γ, n) reaction is used as an activation standard for photodisintegration studies on astrophysically relevant nuclei. At the bremsstrahlung facility of the superconducting electron accelerator ELBE (Electron Linear accelerator of high Brilliance and low Emittance) of Forschungszentrum Dresden-Rossendorf, photoactivation measurements on 197 Au have been performed with bremsstrahlung endpoint energies from 8.0 to 15.5 MeV. The measured activation yield is compared with previous experiments as well as with calculations using Hauser-Feshbach statistical models. It is shown that the experimental data are best described by a two-Lorentzian parametrization with taking the axial deformation of 197 Au into account. The experimental 197 Au(γ, n) reaction yield measured at ELBE via the photoactivation method is found to be consistent with previous experimental data using photon scattering or neutron detection methods.

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Section: A Activation Yield : Comparison With Previous Experimentssupporting

confidence: 56%

“…2, Ref. [34]). The tabulated errors are quite big and therefore were not included for comparison with the ELBE data reported here.…”

Section: A Activation Yield : Comparison With Previous Experimentsmentioning

confidence: 99%

Photoactivation experiment onAu197and its implications for the dipole strength in heavy nuclei

et al. 2008

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“…The HGØ computed tabulation of k n and k e , summed together with the incoherent and coherent scattering cross sections and the atomic photo effect, have been shown to be in close agreement with measurements in the photonuclear region by Gurevich et al (1980) and Sherman et al (1980Sherman et al ( , 1985Sherman et al ( , 1987 Ewart (1981, 1983), Sherman and DelBianco (1988), and a considerable improvement, for high-Z materials, over the 1969 values by Hubbell (1969) and Storm and Israel (1970) which appear to be as much as 4% low for the highest Zs in this energy region.…”

Section: Pair and Triplet Measurements: A Brief History And Surveymentioning

confidence: 50%

“…Preliminary examination and evaluation of the available old and new treatments, experimental (e.g., Sherman et al, 1980Sherman et al, , 1985Sherman et al, , 1987Ewart, 1981, 1983;Sherman and DelBianco, 1988;Gurevich et al, 1980;Dauvergne et al, 2003) and theoretical, suggests that new calculations are advisable, but no dramatic changes in recommended cross sections are anticipated, likely 2-3% at most. However, it is obvious that new computations, beyond HGØ (1980), will again be a ''witch's brew,'' combining interdependent theoretical models, effects and corrections, a worthy challenge for the next table-maker of high-energy photon cross sections and attenuation coefficients to serve the medical, industrial and other user communities who require such data.…”

Section: Discussionmentioning

confidence: 99%

“…This complicating factor, however, stimulated a number of high-accuracy total attenuation coefficient measurements in regions from a few MeV up to a few tens of MeV, for example the works Ahrens et al (1971), Gimm and Hubbell (1978), Gurevich et al (1980) and Sherman et al (1980Sherman et al ( , 1985Sherman et al ( , 1987, Ewart (1981, 1983), Sherman and DelBianco (1988). The primary objective of these measurements was to isolate and evaluate the photonuclear giant resonance cross sections.…”

Section: Pair and Triplet Measurements: A Brief History And Surveymentioning

confidence: 99%

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Electron–positron pair production by photons: A historical overview

Hubbell

2006

Radiation Physics and Chemistry

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This account briefly traces the growth of our theoretical and experimental knowledge of electron-positron pair production by photons, from the prediction of the positron by Dirac [1928a can interact with the Coulomb field of an atomic nucleus to be transformed into an electron-positron pair, the probability increasing with increasing photon energy, up to a plateau at high energies, and increasing with increasing atomic number approximately as the square of the nuclear charge (proton number). This interaction can also take place in the field of an atomic electron, for photons of energy in excess of 4m e c 2 (2.044 MeV), in which case the process is called triplet production due to the track of the recoiling atomic electron adding to the tracks of the created electron-positron pair. The last systematic computations and tabulations of pair and triplet cross sections, which are the predominant contributions to the photon mass attenuation coefficient for photon energies 10 MeV and higher, were those of Hubbell et al. [Pair, triplet, and total atomic cross sections (and mass attenuation coefficients) for 1 MeV-100 GeV photons in elements Z ¼ 1-100. J. Phys. Chem. Ref. Data 9, 1023Data 9, -1147, from threshold (1.022 MeV) up to 100 GeV, for all elements Z ¼ 1-100. These computations required some ad hoc bridging functions between the available low-energy and high-energy theoretical models. Recently (1979Recently ( -2001, Sud and collaborators have developed some new approaches including using distorted wave Born approximation (DWBA) theory to compute pair production cross sections in the intermediate energy region (5.0-10.0 MeV) on a firmer theoretical basis. These and other recent developments, and their possible implications for improved computations of pair and triplet cross sections, are discussed. Published by Elsevier Ltd.

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Cross-sections for formation of 178m2Hf and 179m2Hf through reactions on natural hafnium at neutron energy 14.8 ± 0.2 MeV

Luo

Tuo

Kong

2011

J Radioanal Nucl Chem

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Total photoabsorption cross sections for high-Z ELEMENTS in the energy range 7–20 MeV

Cited by 13 publications

References 7 publications

Photoactivation experiment onAu197and its implications for the dipole strength in heavy nuclei

Photoactivation experiment onAu197and its implications for the dipole strength in heavy nuclei

Electron–positron pair production by photons: A historical overview

Cross-sections for formation of 178m2Hf and 179m2Hf through reactions on natural hafnium at neutron energy 14.8 ± 0.2 MeV

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