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PreprintCC BY 4.0arXiv

EBS and in-beam γ-ray investigation of FCVA-prepared Cr2O3 targets for low-energy 16O+16O fusion experiments

  • C. Wen
  • X. Chen
  • L. Wang
  • Z. An
  • F. Bai
  • Y. Chen
  • X. Fang
  • Y. X. Fan
  • B. S. Gao
  • Z. Y. Guo
  • J. F. Han
  • H. T. Hu
13 more authors
  • W. P. Lin
  • B. Liao
  • S. Lin
  • G. Liu
  • X. Q. Liu
  • P. P. Ren
  • J. Su
  • J. H. Tan
  • X. D. Tang
  • P. Wang
  • S. Wang
  • D. H. Xie
  • N. T. Zhang
Open at sourcePDFDOICite

Abstract

The Cr2O3 solid target for low-energy 16O+16O fusion experiments was fabricated using filtered cathodic vacuum arc (FCVA) deposition. Its composition, oxygen areal density and impurity content were characterized by elastic backscattering spectrometry (EBS), and the impurity-induced background contributions were investigated by in-beam γ-ray spectroscopy. EBS results indicate that the Cr2O3 film exhibits good stoichiometry and uniformity, with 16O areal densities ranging from (3.24−3.25)×1017 atoms/cm2. The EBS analysis reveals a carbon atomic fraction of approximately 1.25-1.29\% in the Cr2O3 layer, while a large amount of carbon impurities are also identified on the surface of Cr substrate. In-beam γ-ray spectra reveal prominent transitions associated with 27Al and 24Mg at 844, 1015, and 1369 keV, mainly originating from 12C+16O fusion reactions induced by carbon impurities under 16O irradiation. Meanwhile, characteristic γ-rays emissions from evaporation channels of the 16O+16O reaction, including 31S, 31P, and 28Si, were also observed and can be used to extract the 16O+16O fusion cross sections. This work provides an experimental basis for the development of high-purity oxide targets and the optimization of target configurations for future low-background 16O+16O fusion cross section measurements.

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Cite

BibTeXRIS
BibTeX
@misc{wen2026inbeam,
  title = {{EBS and in-beam $γ$-ray investigation of FCVA-prepared Cr$_2$O$_3$ targets for low-energy $^16$O+$^16$O fusion experiments}},
  author = {C. Wen and X. Chen and L. Wang and Z. An and F. Bai and Y. Chen and X. Fang and Y. X. Fan and B. S. Gao and Z. Y. Guo and J. F. Han and H. T. Hu and W. P. Lin and B. Liao and S. Lin and G. Liu and X. Q. Liu and P. P. Ren and J. Su and J. H. Tan and X. D. Tang and P. Wang and S. Wang and D. H. Xie and N. T. Zhang},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.06148},
  eprint = {2609.06148},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.06148},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - EBS and in-beam γ-ray investigation of FCVA-prepared Cr_2O_3 targets for low-energy ^16O+^16O fusion experiments
AU  - C. Wen
AU  - X. Chen
AU  - L. Wang
AU  - Z. An
AU  - F. Bai
AU  - Y. Chen
AU  - X. Fang
AU  - Y. X. Fan
AU  - B. S. Gao
AU  - Z. Y. Guo
AU  - J. F. Han
AU  - H. T. Hu
AU  - W. P. Lin
AU  - B. Liao
AU  - S. Lin
AU  - G. Liu
AU  - X. Q. Liu
AU  - P. P. Ren
AU  - J. Su
AU  - J. H. Tan
AU  - X. D. Tang
AU  - P. Wang
AU  - S. Wang
AU  - D. H. Xie
AU  - N. T. Zhang
PY  - 2026
DA  - 2026/09/05
PB  - arXiv
DO  - 10.48550/arxiv.2609.06148
UR  - https://arxiv.org/abs/2609.06148
AB  - The Cr_2O_3 solid target for low-energy ^16O+^16O fusion experiments was fabricated using filtered cathodic vacuum arc (FCVA) deposition. Its composition, oxygen areal density and impurity content were characterized by elastic backscattering spectrometry (EBS), and the impurity-induced background contributions were investigated by in-beam γ-ray spectroscopy. EBS results indicate that the Cr_2O_3 film exhibits good stoichiometry and uniformity, with ^16O areal densities ranging from (3.24−3.25)×10^17 atoms/cm^2. The EBS analysis reveals a carbon atomic fraction of approximately 1.25-1.29\% in the Cr_2O_3 layer, while a large amount of carbon impurities are also identified on the surface of Cr substrate. In-beam γ-ray spectra reveal prominent transitions associated with ^27Al and ^24Mg at 844, 1015, and 1369 keV, mainly originating from ^12C+^16O fusion reactions induced by carbon impurities under ^16O irradiation. Meanwhile, characteristic γ-rays emissions from evaporation channels of the ^16O+^16O reaction, including ^31S, ^31P, and ^28Si, were also observed and can be used to extract the ^16O+^16O fusion cross sections. This work provides an experimental basis for the development of high-purity oxide targets and the optimization of target configurations for future low-background ^16O+^16O fusion cross section measurements.
ER  -