{
  "annotation_id": "21bcbe23-2593-4bda-8398-157625bb63a6",
  "date_created": "2026-03-02T18:00:01.136000Z",
  "date_modified": "2026-03-02T18:00:01.136000Z",
  "file_hash": "cb0bab43b11dc0f35e9fd3fec3f10694b5525cfcdf6ee24ce0e9f406be287440",
  "private": false,
  "record": {
    "abstract": "Elastic $^{6}$He+$^4$He data measured at $E_{\\rm c.m.}=11.6,$ 15.9, and 60.3\nMeV have been analyzed within the coupled reaction channels (CRC) formalism,\nwith the elastic-scattering and two-neutron ($2n$) transfer amplitudes\ncoherently included. Contributions from the direct (one-step) and sequential\n(two-step) $2n$-transfers were treated explicitly based on a realistic\nassumption for the $2n$-transfer form factor. The oscillatory pattern observed\nin $^4$He($^6$He,$^6$He)$^4$He angular distribution at low energies was found\nto be due to an interference between the elastic scattering and $2n$-transfer\namplitudes. Our CRC analysis shows consistently that the direct $2n$-transfer\nstrongly dominates over the sequential transfer and thus confirms the dominance\nof 2$n-^4$He configuration over the $n-^5$He one in the $^6$He wave function.\nThis result suggests a strong clusterization of the two valence neutrons and\nallows, therefore, a reliable estimate for the \\emph{di-neutron} spectroscopic\namplitude.",
    "arxiv_id": "nucl-th/0405025",
    "authors": [
      "Dao T. Khoa",
      "W. von Oertzen"
    ],
    "categories": [
      "nucl-th",
      "nucl-ex"
    ],
    "doi": "10.1016/j.physletb.2004.05.063",
    "journal_ref": "Phys.Lett. B595 (2004) 193-201",
    "title": "Di-neutron elastic transfer in the 4He(6He,6He)4He reaction",
    "url": "https://arxiv.org/abs/nucl-th/0405025"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "517a6a24-c1b4-4273-a69c-5dd9acd814f9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}