{
  "annotation_id": "edf02a0f-6a07-4670-af25-cd8bb64e5da2",
  "date_created": "2026-03-02T18:01:00.585000Z",
  "date_modified": "2026-03-02T18:01:00.585000Z",
  "file_hash": "9d7379c6916176cffbfce217909f6ab5069d26a6e3d77363ee472131517d5ed5",
  "private": false,
  "record": {
    "abstract": "Hard x-ray emission (20 - 200 keV) from plasmas produced by intense laser\npulses on nanoparticle coated targets is compared with that from optically\npolished targets. The yield enhancement offered by nanoparticles is studied\nunder different prepulse conditions. It is observed that the enhancement\nreduces when the nanoparticle coated target is irradiated with a prepulse with\nintensity greater than 10^13 W/cm^2. When the prepulse intensity exceeds 10^14\nW/cm^2, the enhancement vanishes completely. This is attributed to preplasma\nformation on nanoparticles their subsequent structural modifcation before the\narrival of the main pulse. It is suggested that high-contrast ultrashort pulses\nare essential for nanoparticles to function as yield enhancers.",
    "arxiv_id": "physics/0506031",
    "authors": [
      "P. P. Rajeev",
      "S. Kahaly",
      "S. Bose",
      "P. Prem Kiran",
      "P. Taneja",
      "P. Ayyub",
      "G. Ravindra Kumar"
    ],
    "categories": [
      "physics.plasm-ph",
      "physics.optics"
    ],
    "title": "Nanostructures and enhanced absorption in intense laser interaction with   matter: effect of laser prepulses",
    "url": "https://arxiv.org/abs/physics/0506031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7fd86b22-62eb-4203-bc6d-4a457977a174",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}