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New measurement of 51V(γ,1n) cross section through the refined monochromatic cross section extraction method.

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Title: New measurement of 51V(γ,1n) cross section through the refined monochromatic cross section extraction method.
Authors: Hao, Zi-Rui1 (AUTHOR), Fan, Gong-Tao1,2,3 (AUTHOR) fangt@sari.ac.cn, Chen, Chen4,5 (AUTHOR), Sun, Qian-Kun2 (AUTHOR), Wang, Hong-Wei1,2,3 (AUTHOR), Niu, Yi-Fei4,5 (AUTHOR), Xu, Hang-Hua1,3 (AUTHOR), Liu, Long-Xiang1 (AUTHOR), Zhang, Yue1 (AUTHOR), Yang, Yu-Xuan2 (AUTHOR), Chen, Kai-Jie2 (AUTHOR), Li, Zhi-Cai1 (AUTHOR), Jiao, Pu1 (AUTHOR), Zhou, Meng-Die1 (AUTHOR), Ye, Shan1 (AUTHOR), Wang, Zhen-Wei2 (AUTHOR), Wang, Xiang-Fei2 (AUTHOR), Xu, Meng-Ke2 (AUTHOR), Shen, Yu-Long1 (AUTHOR), Yang, Chang1 (AUTHOR)
Source: Physics Letters B. May2026, Vol. 876, pN.PAG-N.PAG. 1p.
Subjects: Vanadium, Nuclear cross sections, Nuclear shapes, Regression analysis, Support vector machines, Laboratories
Abstract: The Giant Dipole Resonance (GDR) in 51V has been a long-term conflicting interpretation, with existing photoneutron cross section data suggesting either a single peak or a pronounced splitting, leading to opposite conclusions on nuclear deformation. A new measurement of the 51V(γ ,1n) cross section, performed at the Shanghai Laser Electron Gamma Source (SLEGS) facility, employs a refined monochromatic cross section extraction method. By integrating Polynomial Regression and Support Vector Regression (SVR) for robust interpolation and extrapolation, the new extracted monoenergetic cross sections exhibit a single, broad peak with no evidence of GDR splitting. Re-analysis of the reported splitting shows that any deformation extracted from such a structure would be relatively weaker than those of neighboring nuclei, providing a support for a spherical or near-spherical shape of 51V. Furthermore, we found that deliberately overfitting the data using an SVR model reproduces multi-peak structures similar to those reported in historical datasets, implying that the previously claimed splitting might originated from analysis artifacts rather than physical phenomena. [ABSTRACT FROM AUTHOR]
Copyright of Physics Letters B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: New measurement of 51V(γ,1n) cross section through the refined monochromatic cross section extraction method.
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  Data: <searchLink fieldCode="AR" term="%22Hao%2C+Zi-Rui%22">Hao, Zi-Rui</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fan%2C+Gong-Tao%22">Fan, Gong-Tao</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> fangt@sari.ac.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Chen%22">Chen, Chen</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Qian-Kun%22">Sun, Qian-Kun</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Hong-Wei%22">Wang, Hong-Wei</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Niu%2C+Yi-Fei%22">Niu, Yi-Fei</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Hang-Hua%22">Xu, Hang-Hua</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Long-Xiang%22">Liu, Long-Xiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Yue%22">Zhang, Yue</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Yu-Xuan%22">Yang, Yu-Xuan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Kai-Jie%22">Chen, Kai-Jie</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Zhi-Cai%22">Li, Zhi-Cai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiao%2C+Pu%22">Jiao, Pu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhou%2C+Meng-Die%22">Zhou, Meng-Die</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ye%2C+Shan%22">Ye, Shan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhen-Wei%22">Wang, Zhen-Wei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Xiang-Fei%22">Wang, Xiang-Fei</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Meng-Ke%22">Xu, Meng-Ke</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shen%2C+Yu-Long%22">Shen, Yu-Long</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Chang%22">Yang, Chang</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Physics+Letters+B%22">Physics Letters B</searchLink>. May2026, Vol. 876, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Vanadium%22">Vanadium</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+cross+sections%22">Nuclear cross sections</searchLink><br /><searchLink fieldCode="DE" term="%22Nuclear+shapes%22">Nuclear shapes</searchLink><br /><searchLink fieldCode="DE" term="%22Regression+analysis%22">Regression analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Support+vector+machines%22">Support vector machines</searchLink><br /><searchLink fieldCode="DE" term="%22Laboratories%22">Laboratories</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: The Giant Dipole Resonance (GDR) in 51V has been a long-term conflicting interpretation, with existing photoneutron cross section data suggesting either a single peak or a pronounced splitting, leading to opposite conclusions on nuclear deformation. A new measurement of the 51V(γ ,1n) cross section, performed at the Shanghai Laser Electron Gamma Source (SLEGS) facility, employs a refined monochromatic cross section extraction method. By integrating Polynomial Regression and Support Vector Regression (SVR) for robust interpolation and extrapolation, the new extracted monoenergetic cross sections exhibit a single, broad peak with no evidence of GDR splitting. Re-analysis of the reported splitting shows that any deformation extracted from such a structure would be relatively weaker than those of neighboring nuclei, providing a support for a spherical or near-spherical shape of 51V. Furthermore, we found that deliberately overfitting the data using an SVR model reproduces multi-peak structures similar to those reported in historical datasets, implying that the previously claimed splitting might originated from analysis artifacts rather than physical phenomena. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Physics Letters B is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.physletb.2026.140445
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      – Code: eng
        Text: English
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        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Vanadium
        Type: general
      – SubjectFull: Nuclear cross sections
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      – SubjectFull: Nuclear shapes
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      – SubjectFull: Regression analysis
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      – SubjectFull: Support vector machines
        Type: general
      – SubjectFull: Laboratories
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      – TitleFull: New measurement of 51V(γ,1n) cross section through the refined monochromatic cross section extraction method.
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              Text: May2026
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