{
  "annotation_id": "2fc63f08-0315-49d2-9f2b-cdfe6a29476c",
  "date_created": "2026-03-02T18:00:04.961000Z",
  "date_modified": "2026-03-02T18:00:04.961000Z",
  "file_hash": "f9677a76581fa3b76f63502899aa01bb2e701fd85a5d2075686065b8c6e396be",
  "private": false,
  "record": {
    "abstract": "Using a schematic solvable many-body Hamiltonian, one studies a new type of\nproton-neutron excitations within a time dependent variational approach.\nClassical equations of motion are linearized and subsequently solved\nanalytically. The harmonic state energy is compared with the energy of the\nfirst excited state provided by diagonalization as well as with the energies\nobtained by a renormalized RPA and a boson expansion procedure. The new\ncollective mode describes a wobbling motion, in the space of isospin, and\ncollapses for a particle-particle interaction strength which is much larger\nthan the physical value. A suggestion for the description of the system in the\nsecond nuclear phase is made. We identified the transition operators which\nmight excite the new mode from the ground state.",
    "arxiv_id": "nucl-th/0503041",
    "authors": [
      "A. A. Raduta",
      "C. M. Raduta",
      "B. Codirla"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1016/S0375-9474(00)00324-9",
    "journal_ref": "Nucl.Phys. A678 (2000) 382",
    "title": "New features of some proton-neutron collective states",
    "url": "https://arxiv.org/abs/nucl-th/0503041"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "cb2f9c0a-5d66-409b-b4c5-d637801c6479",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}