{
  "annotation_id": "04f02cd7-0006-43f1-bf40-d6cd586c37fc",
  "date_created": "2026-03-02T18:00:43.144000Z",
  "date_modified": "2026-03-02T18:00:43.144000Z",
  "file_hash": "a8e8602203b1bd9bf0335f2f739363dd154994c3fc095bc569abc2dae5bf5a42",
  "private": false,
  "record": {
    "abstract": "We report the first observation of a non-dipole transition in an ultra-cold\natomic vapor. We excite the 3P-4P electric quadrupole (E2) transition in\n$^{23}$Na confined in a Magneto-Optical Trap(MOT), and demonstrate its\napplication to high-resolution spectroscopy by making the first measurement of\nthe hyperfine structure of the 4P$_{1/2}$ level and extracting the magnetic\ndipole constant A $=$ 30.6 $\\pm$ 0.1 MHz. We use cw OODR (Optical-Optical\nDouble Resonance) accompanied by photoinization to probe the transition.",
    "arxiv_id": "physics/0304031",
    "authors": [
      "M. Bhattacharya",
      "C. Haimberger",
      "N. P. Bigelow"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevLett.91.213004",
    "title": "Forbidden Transitions in a Magneto-Optical Trap",
    "url": "https://arxiv.org/abs/physics/0304031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "47197061-d817-424a-bee7-9d835318640f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}