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<p>Exploring the limits of neutron binding in atomic nuclei remains a central focus of nuclear physics. However, the experimental determination of the neutron drip line is challenging because of the minuscule production cross sections of the most neutron-rich isotopes. We investigate the effectiveness of multi-step fragmentation for producing extremely neutron-rich nuclides at relativistic energies. We demonstrate that multi-step fragmentation dominates over single-step fragmentation in thick-target experiments and can enhance the yields of drip-line nuclei by several orders of magnitude in a realistic experiment using fragment separators. Such enhancements open new possibilities for locating the&#xa0;drip lines above sodium and thus significantly expand the research horizon.</p>

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Searching for nuclei on the edge of stability with multi-step fragmentation

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Xiu-Lin Wei,
  • Bao-Hua Sun,
  • Satoru Terashima,
  • Isao Tanihata,
  • Tian-Yu Wu,
  • Chang-Jian Wang

摘要

Exploring the limits of neutron binding in atomic nuclei remains a central focus of nuclear physics. However, the experimental determination of the neutron drip line is challenging because of the minuscule production cross sections of the most neutron-rich isotopes. We investigate the effectiveness of multi-step fragmentation for producing extremely neutron-rich nuclides at relativistic energies. We demonstrate that multi-step fragmentation dominates over single-step fragmentation in thick-target experiments and can enhance the yields of drip-line nuclei by several orders of magnitude in a realistic experiment using fragment separators. Such enhancements open new possibilities for locating the drip lines above sodium and thus significantly expand the research horizon.