Measurements of the $$^{197}$$Au(n, $$\gamma $$) cross section up to 100 keV at the CSNS Back-n facility

Hu, Xinrong; Fan, Guoliang; Jiang, Wei; Ren, Jie; Liu, Longxiang; Wang, Hongwei; Liu, Yingdu; Li, Xinxiang; Zhang, Yue; Hao, Zirui; Kuang, P.; Wang, Xiaohe; Hu, Jifeng; Jiang, Bing; Wang, Dexin; Zhang, Suyalatu; An, Zhenguo; Wang, Yuting; Ma, Can; He, Jiajia; Su, J.; Zhang, Liyong

doi:10.1007/s41365-021-00931-w

Cited by 19 publications

(9 citation statements)

References 32 publications

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“…PHWT was originally applied by Macklin and Gibbons in the measurement of neutron capture cross section by the C 6 F 6 detector [9]. This method has shown suitable for the detector systems in Back-n beamline [20,21].…”

Section: Discussionmentioning

confidence: 99%

“…One is about the time allocation of measurements for gold target and background, especially for gold target. The gold target as the main target was fully measured in January 2019, and the result was published elsewhere [20,21]. In subsequent experiments, the gold targets were only measured as validation data to ensure the correctness of each experimental setup and data analysis.…”

Section: Discussionmentioning

confidence: 99%

“…The back-streaming white neutron beamline (Back-n) was built in 2018, and it is mainly used for neutron data measurements [18,19]. So far, a number of neutron capture reaction experiments have been carried out on the Back-n beamline [20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

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Neutron capture measurement and resonance parameter analysis of natSm

Li¹,

Liu²,

Jiang³

et al. 2022

Preprint

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Multiple isotopes of samarium element are the isotopes produced by the s process, and 154 Sm is produced by the r process. In addition, 144 Sm is p nuclei in nuclear astrophysics. The measurement of these can help us to better understand the results of relevant photonuclear reaction experiments. On the other hand, 149 Sm is a 235 U fission product with a 1% yield, its cross sections are important to reactor neutronics. In this work, the neutron capture yield of the natural samarium target was measured at the back-streaming white neutron beamline (Back-n) of the China Spallation Neutron Source (CSNS), and the resonance parameters were analyzed by SAMMY code. The resonance peaks and the neutron separation energies contributed by the different isotopes are considered individually. The results of the capture yield found signs of the possibility of two resonance peaks at 8 eV, which awaits further experimental examination. Cross-section was calculated according to resonance parameters and was compared with other experimental results and evaluation databases of ENDF/B-VIII.0 and CENDL-3.2. A clear difference between ENDF/B VIII.0 and CENDL-3.2 database appears at 23.2 eV, the experimental result at this energy is smaller than data of ENDF/B VIII.0 database but CENDL-3.2 database. Most of the controversial experimental results invariably come from the samarium 149 isotope.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Neutron capture measurement and resonance parameter analysis of natSm

Li¹,

Liu²,

Jiang³

et al. 2022

Preprint

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“…The SLEGS beamline will be open to users by the end of 2022. In recent years, some large nuclear scientific facilities have started construction and been put into operation, including the back-streaming neutron (Back-n) source [45,46] at the China Spallation Neutron Source (CSNS), the High-Intensity Heavy-ion Accelerator Facility (HIAF) [47][48][49] and CSR External-target Experiment (CEE) [50], Collinear Laser Spectroscopy (CLS) [51,52], and the new Beijing Radioactive Ion-beam Facility (BRIF) [53]. The completion of these facilities or devices will surely China's nuclear physics basic and applied research to the next level.…”

Section: Summary and Prospectsmentioning

confidence: 99%

Commissioning of laser electron gamma beamline SLEGS at SSRF

et al. 2022

Self Cite

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The Shanghai Laser Electron Gamma Source (SLEGS) is a powerful gamma source that provides MeV gamma-ray beams for nuclear science and technology. It was developed as one of the 16 beamline stations in the Phase II Project of the Shanghai Synchrotron Radiation Facility. The slant-scattering mode is for the first time systematically employed in laser Compton scattering at SLEGS to produce energy-tunable quasi-monoenergetic gamma-ray beams. The SLEGS officially completed its commissioning from July to December 2021. Gamma rays in the energy range of 0.25–21.7 MeV with a flux of 2.1 × 104–1.2 × 107 photons/s and an energy spread of 2–15% were produced during the test. This paper reports the results from commissioning the SLEGS beamline.

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“…[22] The measurements of the 197 Au(n, γ) cross section can be found in the literature. [23,24] For obtaining the experimental counting spectrum, a series of parameters were extracted and analyzed from the digital waveforms of the C 6 D 6 detectors, i.e., the amplitude, the baseline and signal area. [25]…”

Section: Determination Of Neutron Energymentioning

confidence: 99%

Measurement of ²³²Th (n, γ) cross section at the CSNS Back-n facility in the unresolved resonance region from 4 keV to 100 keV

Jiang¹,

Han²,

Ren³

et al. 2022

Chinese Phys. B

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The neutron capture cross section of 232Th was measured at the neutron time-of-flight facility Back-n of China Spallation Neutron Source (CSNS) for the first time. The measurement was performed with 4 hydrogen-free deuterated benzene C6D6 liquid scintillation detectors, in the ES#2 experiment station on the beam line, at a distance of about 76 m from the neutron-production assembly. The total energy detection principle in combination with the Pulse Height Weighting Technique (PHWT) was applied to analyze the measured data. Results of the 232Th (n,γ) reaction cross section in the unresolved resonance region from 4 keV to 100 keV are obtained, which shows a good agreement with the existing experimental data from EXFOR, as well as with the evaluated data from the ENDF/B-VIII.0 and CENDL-3.1. In addition, the excitation function of 232Th (n,γ)233Th reaction in the unresolved resonance region was theoretically calculated by using the code TALYS-1.95. By fitting the experimental cross section and theoretical data, the average parameters in the unresolved resonance region are extracted. The datasets are openly available at https://www.scidb.cn/en/s/z6JR3e.

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Measurements of the $$^{197}$$Au(n, $$\gamma $$) cross section up to 100 keV at the CSNS Back-n facility

Cited by 19 publications

References 32 publications

Neutron capture measurement and resonance parameter analysis of natSm

Neutron capture measurement and resonance parameter analysis of natSm

Commissioning of laser electron gamma beamline SLEGS at SSRF

Measurement of ²³²Th (n, γ) cross section at the CSNS Back-n facility in the unresolved resonance region from 4 keV to 100 keV

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Measurements of the $$^{197}$$Au(n, $$\gamma $$) cross section up to 100 keV at the CSNS Back-n facility

Cited by 19 publications

References 32 publications

Neutron capture measurement and resonance parameter analysis of natSm

Neutron capture measurement and resonance parameter analysis of natSm

Commissioning of laser electron gamma beamline SLEGS at SSRF

Measurement of 232Th (n, γ) cross section at the CSNS Back-n facility in the unresolved resonance region from 4 keV to 100 keV

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Measurement of ²³²Th (n, γ) cross section at the CSNS Back-n facility in the unresolved resonance region from 4 keV to 100 keV