Photoneutron Cross Sections for Au Revisited: Measurements with Laser Compton Scattering γ-Rays and Data Reduction by a Least-Squares Method

Osamu ITOH Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan

Hiroaki UTSUNOMIYA Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan

Hidetoshi AKIMUNE Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan

Takeo KONDO Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan

Masaki KAMATA Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan

Tamio YAMAGATA Department of Physics, Konan University, 8-9-1 Okamoto, Higashinada, Kobe, 658-8501, Japan

Hiroyuki TOYOKAWA National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, 305-8568, Japan

Hideo HARADA Japan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki, 319-1195, Japan

Fumito KITATANI Japan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki, 319-1195, Japan

Shinji GOKO Japan Atomic Energy Agency, Tokai-mura, Naka, Ibaraki, 319-1195, Japan

Chithra NAIR Institut für Strahlenphysik, Forschungszentrum Dresden-Rossendorf, D-01314, Dresden, Germany

Yiu-Wing LUI Cyclotron Institute, Texas A&M University, College Station, Texas, 77843, USA

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Abstract

Photoneutron cross section measurements were made for Au in the entire energy range of the (γ,n) channel based on a direct neutron counting with quasi-monochromatic γ-rays produced in inverse Compton scattering of laser photons with relativistic electrons. The data were analyzed by a least-squares method to deduce photoneutron cross sections. The analysis significantly reduced experimental uncertainties compared with those resulting from the photon difference method. The result is compared with the previous data by direct neutron counting with γ-rays produced in positron annihilation in flight and by photoactivation with bremsstrahlung. The present data are in good agreement with the previous data near the neutron threshold, while there remain some discrepancies between the present and the previous data above 10 MeV.

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Photoneutron Cross Sections for Au Revisited: Measurements with Laser Compton Scattering γ-Rays and Data Reduction by a Least-Squares Method

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Photoneutron Cross Sections for Au Revisited: Measurements with Laser Compton Scattering γ-Rays and Data Reduction by a Least-Squares Method

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