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Experimental study of photoneutron spectra from tantalum, tungsten, and bismuth targets for 16.6 MeV polarized photons

Authors :
Hong Thuong, Nguyen Thi
Sanami, Toshiya
Yamazaki, Hirohito
Itoga, Toshiro
Kirihara, Yoichi
Sugihara, Kenta
Tuyet, Tran Kim
Mohd Zin, Mohd Faiz Bin
Miyamoto, Shuji
Hashimoto, Satoshi
Asano, Yoshihiro
Source :
Journal of Nuclear Science and Technology; February 2024, Vol. 61 Issue: 2 p261-268, 8p
Publication Year :
2024

Abstract

ABSTRACTThe double differential cross-sections (DDXs) of photoneutron production via the photonuclear reaction on tantalum, tungsten, and bismuth for 16.6 MeV linearly polarized photon beam were measured using the time-of-flight method at the NewSUBARU-BL01 facility. Polarized photons were obtained by the laser Compton backscattering (LCS) technique. Two distinct components were observed on the spectra: the low-energy component up to 4 MeV and the high-energy above 4 MeV. The angular distribution of the low-energy component was isotropic, whereas the high-energy was distributed anisotropically and affected by the polarized incident photons. These distributions were similar to the previous studies on the 197Au target. The low-energy component's data were fitted with the Maxwellian function. According to the fitting results, the slopes of low-energy neutrons’ distribution for natTa and natW are similar and steeper than that of 209Bi. The anisotropy of the high-energy component can be expressed as a function of $\cos 2{\rm{\Theta\ }}$cos2Θ , where $\Theta $Θis the angle between the direction of the photon polarization and neutron emission.The DDX energy integrations of the high-energy component were calculated and compared between the three targets. These integration values on natTa and natW were comparable and around 1.5 times smaller than those on 209Bi, regardless of the detection angles.

Details

Language :
English
ISSN :
00223131 and 18811248
Volume :
61
Issue :
2
Database :
Supplemental Index
Journal :
Journal of Nuclear Science and Technology
Publication Type :
Periodical
Accession number :
ejs65403948
Full Text :
https://doi.org/10.1080/00223131.2023.2295438