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Cross-sections of photoneutron reactions on $^{181}$Ta at $e_{\rm \gamma max}$ up to 95 MeV
Nuclear Experiment · Submitted 27 Nov 2021
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim A comparison between the experimental total cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ and the theoretical values has shown satisfactory agreement for the $^{181}\rm{Ta}(\gamma,\textit{x}n)$ reactions with the escape of 1-4, 6 and 7 neutrons.
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The abstract, sentence by sentence
The total bremsstrahlung flux-averaged cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ for the photonuclear reactions $^{181}\rm{Ta}(\gamma,\textit{x}n; \textit{x} \leq 8)^{181-\textit{x}}\rm{Ta}$ have been measured in the range of end-point energies $E_{\rm \gamma max}$ up to 95 MeV. The experiments were performed with the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of the activation and off-line $\gamma$-ray spectrometric technique. The calculation of average cross-sections was carried out using the cross-section values computed with the TALYS1.95 code for different level density models $LD$ 1-6. A comparison between the experimental total cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ and the theoretical values has shown satisfactory agreement for the $^{181}\rm{Ta}(\gamma,\textit{x}n)$ reactions with the escape of 1-4, 6 and 7 neutrons. The closest agreement with the measured data is observed with the $LD$5 computation version, which represents the microscopic level density model taking into account Hilaire's combinatorial tables.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The total bremsstrahlung flux-averaged cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ for the photonuclear reactions $^{181}\rm{Ta}(\gamma,\textit{x}n; \textit{x} \leq 8)^{181-\textit{x}}\rm{Ta}$ have been measured in the range of end-point energies $E_{\rm \gamma max}$ up to 95 MeV. | contribution 0.67 | 0.95 | 0.10 | asserted 1.00 |
| s1 | The experiments were performed with the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of the activation and off-line $\gamma$-ray spectrometric technique. | method 1.00 | 0.93 | 0.02 | asserted 1.00 |
| s2 | The calculation of average cross-sections was carried out using the cross-section values computed with the TALYS1.95 code for different level density models $LD$ 1-6. | method 1.00 | 0.84 | 0.03 | asserted 0.99 |
| s3 | A comparison between the experimental total cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ and the theoretical values has shown satisfactory agreement for the $^{181}\rm{Ta}(\gamma,\textit{x}n)$ reactions with the escape of 1-4, 6 and 7 neutrons. | result 0.95 | 0.93 | 0.51 | asserted 0.98 |
| s4 | The closest agreement with the measured data is observed with the $LD$5 computation version, which represents the microscopic level density model taking into account Hilaire's combinatorial tables. | result 0.75 | 0.87 | 0.48 | asserted 1.00 |
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The paper
Original abstract
The total bremsstrahlung flux-averaged cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ for the photonuclear reactions $^{181}\rm{Ta}(\gamma,\textit{x}n; \textit{x} \leq 8)^{181-\textit{x}}\rm{Ta}$ have been measured in the range of end-point energies $E_{\rm \gamma max}$ up to 95 MeV. The experiments were performed with the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of the activation and off-line $\gamma$-ray spectrometric technique. The calculation of average cross-sections was carried out using the cross-section values computed with the TALYS1.95 code for different level density models $LD$ 1-6. A comparison between the experimental total cross-sections $\langle{\sigma(E_{\rm{\gamma max}})}\rangle$ and the theoretical values has shown satisfactory agreement for the $^{181}\rm{Ta}(\gamma,\textit{x}n)$ reactions with the escape of 1-4, 6 and 7 neutrons. The closest agreement with the measured data is observed with the $LD$5 computation version, which represents the microscopic level density model taking into account Hilaire's combinatorial tables.
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References
How the literature uses it
3 arXiv papers cite this in 11 sentences
Papers citing it · 7 sentences without a confident label
Uses its method or tool 1 paper
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A more detailed description of all the calculation procedures necessary for the determination of $⟨σ(E_γmax)⟩$ can be found in [ref] .
Photoproduction of the ${^{55-57}}$Co nuclei on ${^{\rm nat}}$Ni at the bremsstrahlung end-point energy of 35-94 MeV · Calculation of flux-averaged cross-sections · 0.95
Uses its data or values 1 paper
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To obtain the relative yield, the experimental values of the flux-averaged cross-section of the $^181Ta(γ,n)^180gTa$ reaction from [ref] were used, taking into account the difference in bremsstrahlung $γ$-flux due to the difference in the reaction thresholds $E_thr(γ, n)$ = 7.58 MeV and $E_thr(γ, p)$ = 7.09 MeV.
Production of ${^{180\rm{m}}}$Hf in photoproton reaction ${^{181}}$Ta$(\gamma,p)$ at energy $E_{\rm{\gamma max}}$ = 35-95 MeV · Experimental values of bremsstrahlung flux-averaged cross-section $⟨σ(E_γmax)⟩_m$ · 0.97
Cites it as background 2 papers
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Previously, photonuclear reactions $^181Ta(γ,xn)^180-xTa$ were studied for reactions with $x ≤8$ at photon energies up to 130 MeV [ref] .
Production of ${^{180\rm{m}}}$Hf in photoproton reaction ${^{181}}$Ta$(\gamma,p)$ at energy $E_{\rm{\gamma max}}$ = 35-95 MeV · Introduction · 0.93
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Studies are being carried out on high-threshold photoneutron reactions [ref] , photoproton [ref] , and photonuclear reactions with the emission of charged particles/clusters [ref] .
Photoproduction of the ${^{55-57}}$Co nuclei on ${^{\rm nat}}$Ni at the bremsstrahlung end-point energy of 35-94 MeV · Introduction · 0.81
What it cites · 10 sentences without a confident label
Uses the method or tool of 1 paper
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The monitoring procedure has been detailed in [ref] .
2101.08614 · Bremsstrahlung $γ$-flux monitoring · 0.91
Uses data or values from 1 paper
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The total average cross-sections $⟨σ(E_γmax)⟩$ for the $^181Ta(γ,3n)^178Ta$ reaction [ref] are shown in Fig. [ref]c.
Isomeric Ratio of the $^{181}\rm{Ta}(\gamma,3n)^{178m,g}\rm{Ta}$ Reaction Products at Energy $E_{\rm{\gamma max}}$ up to 95 MeV · RESULTS AND DISCUSSION · 0.81
Compares with 1 paper
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Within the limits of experimental errors, the data of this work and from [ref] are in satisfactory agreement for all the reactions under consideration.
Photoneutron Reactions $^{181}\rm{Ta}(\gamma,\textit{x}n; \textit{x} = 1 \div 8)^{181-\textit{x}}\rm{Ta}$ AT $E_{\rm{\gamma max}}$ = 80 $\div$ 95 MeV · RESULTS AND DISCUSSION · 1.00
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