We report the experimental cross sections for the <InlineEquation ID="IEq7"> <EquationSource Format="TEX">$^{61}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>61</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Ni(<InlineEquation ID="IEq8"> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>,xp) reaction in the <InlineEquation ID="IEq9"> <EquationSource Format="TEX">$E_\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <msub> <mi>E</mi> <mi>γ</mi> </msub> </math></EquationSource> </InlineEquation> range of 25–28 MeV, obtained using the surrogate reaction ratio method with the <InlineEquation ID="IEq10"> <EquationSource Format="TEX">$^{59}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>59</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Co(<InlineEquation ID="IEq11"> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>,xp) reaction as a reference. The desired and reference compound nuclei <InlineEquation ID="IEq12"> <EquationSource Format="TEX">$^{61}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>61</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Ni<InlineEquation ID="IEq13"> <EquationSource Format="TEX">$^$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mo>∗</mo> </mmultiscripts> </math></EquationSource> </InlineEquation> and <InlineEquation ID="IEq14"> <EquationSource Format="TEX">$^{59}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>59</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Co<InlineEquation ID="IEq15"> <EquationSource Format="TEX">$^$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mo>∗</mo> </mmultiscripts> </math></EquationSource> </InlineEquation> were produced via the transfer reactions <InlineEquation ID="IEq16"> <EquationSource Format="TEX">$^{59}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>59</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Co(<InlineEquation ID="IEq17"> <EquationSource Format="TEX">$^6$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>6</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Li,<InlineEquation ID="IEq18"> <EquationSource Format="TEX">$\alpha$</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation>) and <InlineEquation ID="IEq19"> <EquationSource Format="TEX">$^{57}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>57</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Fe(<InlineEquation ID="IEq20"> <EquationSource Format="TEX">$^6$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>6</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Li,<InlineEquation ID="IEq21"> <EquationSource Format="TEX">$\alpha$</EquationSource> <EquationSource Format="MATHML"><math> <mi>α</mi> </math></EquationSource> </InlineEquation>), respectively. The measured results are compared with predictions from the evaluated photonuclear data libraries (tendl-2023, kaeri, and jendl-5.0) and with Hauser-Feshbach model calculations using the talys-2.0 code. The tendl-2023 and jendl-5.0 evaluations tend to underestimate the experimental cross sections; however, the kaeri predictions match the measured values within the associated uncertainties. The talys calculations, employing nuclear-level densities from Hilaire’s combinatorial tables and photon strength functions derived from the Skyrme-Hartree-Fock-Bogoliubov approach, reproduce the experimental data well. These findings indicate that the kaeri evaluation is the most reliable for cross-section predictions for the <InlineEquation ID="IEq22"> <EquationSource Format="TEX">$^{61}$</EquationSource> <EquationSource Format="MATHML"><math> <mmultiscripts> <mrow /> <mrow /> <mn>61</mn> </mmultiscripts> </math></EquationSource> </InlineEquation>Ni(<InlineEquation ID="IEq23"> <EquationSource Format="TEX">$\gamma$</EquationSource> <EquationSource Format="MATHML"><math> <mi>γ</mi> </math></EquationSource> </InlineEquation>,xp) channel and highlight the need to reassess the modeling assumptions in tendl-2023 and jendl-5.0.

Photonuclear ⁶¹Ni(γ, xp) cross-section measurement using surrogate reactions

期刊论文
发表日期：

2026年6月18日

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Ramandeep Gandhi,
S. Santra,
P. C. Rout,
A. Pal,
A. Baishya,
T. Santhosh,
D. Chattopadhyay,
K. Ramachandran,
G. Mohanto,
Jyoti Pandey,
Nishant Kumar,
Rudrajyoti Palit

摘要

We report the experimental cross sections for the $^{61}$ $^{61}$ Ni( $\gamma$ $γ$ ,xp) reaction in the $E_\gamma$ $E_{γ}$ range of 25–28 MeV, obtained using the surrogate reaction ratio method with the $^{59}$ $^{59}$ Co( $\gamma$ $γ$ ,xp) reaction as a reference. The desired and reference compound nuclei $^{61}$ $^{61}$ Ni $^*$ $^{*}$ and $^{59}$ $^{59}$ Co $^*$ $^{*}$ were produced via the transfer reactions $^{59}$ $^{59}$ Co( $^6$ $^{6}$ Li, $\alpha$ $α$ ) and $^{57}$ $^{57}$ Fe( $^6$ $^{6}$ Li, $\alpha$ $α$ ), respectively. The measured results are compared with predictions from the evaluated photonuclear data libraries (tendl-2023, kaeri, and jendl-5.0) and with Hauser-Feshbach model calculations using the talys-2.0 code. The tendl-2023 and jendl-5.0 evaluations tend to underestimate the experimental cross sections; however, the kaeri predictions match the measured values within the associated uncertainties. The talys calculations, employing nuclear-level densities from Hilaire’s combinatorial tables and photon strength functions derived from the Skyrme-Hartree-Fock-Bogoliubov approach, reproduce the experimental data well. These findings indicate that the kaeri evaluation is the most reliable for cross-section predictions for the $^{61}$ $^{61}$ Ni( $\gamma$ $γ$ ,xp) channel and highlight the need to reassess the modeling assumptions in tendl-2023 and jendl-5.0.

Photonuclear 61Ni(γ, xp) cross-section measurement using surrogate reactions

摘要

Photonuclear ⁶¹Ni(γ, xp) cross-section measurement using surrogate reactions