{
  "annotation_id": "3062fba6-0dbf-4462-b52e-dfee5992aeba",
  "date_created": "2026-03-02T18:00:36.425000Z",
  "date_modified": "2026-03-02T18:00:36.425000Z",
  "file_hash": "13ceed0a35b94eb34ce5810addecebe586ff84d09efd95258ca586b78c882dc7",
  "private": false,
  "record": {
    "abstract": "An accurate method to compute the annihilation rate in positronic systems by\nmeans of quantum Monte Carlo simulations is tested and compared with previously\nproposed methods using simple model systems. This method can be applied within\nall the quantum Monte Carlo techniques, just requiring to accumulate the\npositron-electron distribution function. The annihilation rate of e$^+$LiH as a\nfunction of the internuclear distance is studied using a model potential\napproach to eliminate the core electrons of Li, and explicitly correlated wave\nfunctions to deal with all the remaining particles. These results allow us to\ncompute vibrationally averaged annihilation rates, and to understand the effect\nof the Li$^+$ electric field on positron and electron distributions.",
    "arxiv_id": "physics/0110035",
    "authors": [
      "Massimo Mella",
      "Simone Chiesa",
      "Gabriele Morosi"
    ],
    "categories": [
      "physics.chem-ph"
    ],
    "doi": "10.1063/1.1436464",
    "title": "Annihilation rate in positronic systems by quantum Monte Carlo. e$^+$LiH   as test case",
    "url": "https://arxiv.org/abs/physics/0110035"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c6dd7f5f-482a-4b15-9c00-6492f5800875",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}