{
  "annotation_id": "73718a38-9f99-49ee-b976-05393a3c54a6",
  "date_created": "2026-03-02T18:00:46.507000Z",
  "date_modified": "2026-03-02T18:00:46.507000Z",
  "file_hash": "f34246c938a23cdfb8269867f72e346b592822959259244d1cab325345a94425",
  "private": false,
  "record": {
    "abstract": "We perform metastability exchange optical pumping of helium-3 in a strong\nmagnetic field of 1.5 T. The achieved nuclear polarization, from 80% at 1.33\nmbar to 25% at 67 mbar, shows a substantial improvement at high pressures with\nrespect to standard low-field optical pumping. The specific mechanisms of\nmetastability exchange optical pumping at high field are investigated,\nadvantages and intrinsic limitations are discussed. From a practical point of\nview, our results open the way to alternative technological solutions for\npolarized helium-3 applications and in particular for magnetic resonance\nimaging of human lungs.",
    "arxiv_id": "physics/0307154",
    "authors": [
      "Marie Abboud",
      "Alice Sinatra",
      "Xavier Maitre",
      "Genevieve Tastevin",
      "Pierre-Jean Nacher"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1209/epl/i2004-10237-y",
    "journal_ref": "Europhysics Letters 68 (2004) 480",
    "title": "High nuclear polarization of helium-3 at low and high pressure by   metastability exchange optical pumping at 1.5 Tesla",
    "url": "https://arxiv.org/abs/physics/0307154"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8f9f7929-45e3-42d4-b2fa-01622772ff8f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}