Thermal neutron cross-section and resonance integral of the 186W(n,γ)187W reaction

Do, Nguyen Van; Khue, Pham Duc; Thanh, Kim Tien; Son, Le Truong; Kim, Gui Nyun; Lee, Young Seok; Oh, Y. D.; Lee, Hee-Seok; Cho, Moo‐Hyun; Ko, In Soo; Namkung, W.

doi:10.1016/j.nimb.2008.02.021

Cited by 13 publications

(2 citation statements)

References 33 publications

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“…Another important observation from the two figures (Figs. 4 and 5) is that some of the generated photoneutrons lie in the thermal and epithermal energy ranges where radiative capture reactions are known to thrive most [22][23][24]. The gamma-ray spectra generated in lead and tungsten due to (n,c) reactions are shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

Investigation of photoneutron and capture gamma-ray production in Pb and W under irradiation from 16N decay radiation

Kebwaro

Zhao

2015

Nuclear Instruments and Methods in Physics Research Section B:

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a b s t r a c tLead and tungsten are potential alternative materials for shielding reactor ex-core components with high 16 N activity when available space limits application of concrete. Since the two materials are vulnerable to photonuclear reactions, the nature and intensity of the secondary radiation resulting from (c,n) and (n,c) reactions when 16 N decay radiation interact with these materials need to be well known for effective shielding design. In this study the MCNP code was used to calculate the photoneutron and capture gamma-ray spectra in the two materials when irradiated by 16 N decay radiation. It was observed that some of the photoneutrons generated in the two materials lie in the low-energy range which is considered optimum for (n,c) reactions. Lead is more transparent to the photoneutrons when compared to tungsten. The calculations also revealed that the bremsstrahlung generated by the beta spectrum was not sufficient to trigger any additional photoneutrons. Both energetic and less energetic capture gamma-rays are observed when photoneutrons interact with nuclei of the two materials. Depending on the strength of the 16 N source term, the secondary radiation could affect the effectiveness of the shield and need to be considered during design.

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Section: Resultsmentioning

confidence: 99%

Investigation of photoneutron and capture gamma-ray production in Pb and W under irradiation from 16N decay radiation

Kebwaro

Zhao

2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…Here, φ is the thermal neutron flux in the McClellan imaging bay, N is the number of irradiated nuclei in the target under consideration, σ 0 is the appropriate thermal neutron capture cross section, λ is the activation product decay constant, G th is the thermal neutron self-shielding factor for the irradiated target, and g is the Westcott correction factor that accounts for the deviation of the capture cross section from a pure 1/v energy dependence. Typical G th corrective factors for micron-thick targets are in the 0.97-1.0 range and have established calculation methods [41][42][43][44]. From Mughabghab [45], the Westcott correction factor for arsenic is 1.0005, for gold is 1.0054, and for copper is 1.0002.…”

Section: Activation Analysismentioning

confidence: 99%

Preparation and Characterization of Thin Arsenic Targets for Stacked-Target Experiments

Voyles,

Fox,

Morrell

et al. 2021

Preprint

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Thin uniform arsenic targets suitable for high-fidelity cross section measurements in stacked-target experiments were prepared by electrodeposition of arsenic on titanium backings from aqueous solutions. Electrolytic cells were constructed and capable of arsenic deposits ranging in mass from approximately 1 to 29 mg (0.32-7.22 mg/cm 2 , 0.57-12.62 µm). Examination of electrodeposit surface morphology by scanning electron microscopy and microanalysis was performed to investigate the uniformity of produced targets. Brief studies of plating growth dynamics and structural properties through cyclic voltammetry were also undertaken. An alternative target fabrication approach by vapor deposition was additionally conducted. We further introduce a non-destructive characterization method for thin targets by neutron activation, which is independent of neutron flux shape, environmental factors, and source geometry, while correcting for any potential scatter or absorption effects.

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Thermal neutron capture cross-section and resonance integral measurements of 186W(n,γ)187W reaction using the thermal column neutron source at the Dalat research reactor

Tu Anh,

Son,

Thuy

et al. 2023

Annals of Nuclear Energy

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Thermal neutron cross-section and resonance integral of the 186W(n,γ)187W reaction

Cited by 13 publications

References 33 publications

Investigation of photoneutron and capture gamma-ray production in Pb and W under irradiation from 16N decay radiation

Investigation of photoneutron and capture gamma-ray production in Pb and W under irradiation from 16N decay radiation

Preparation and Characterization of Thin Arsenic Targets for Stacked-Target Experiments

Thermal neutron capture cross-section and resonance integral measurements of 186W(n,γ)187W reaction using the thermal column neutron source at the Dalat research reactor

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