{
  "id": "1202.0368",
  "version": "v1",
  "published": "2012-02-02T06:00:51.000Z",
  "updated": "2012-02-02T06:00:51.000Z",
  "title": "Ab initio study of the photoabsorption of $^4$He",
  "authors": [
    "W. Horiuchi",
    "Y. Suzuki",
    "K. Arai"
  ],
  "comment": "15 pages, 12 figures",
  "categories": [
    "nucl-th",
    "nucl-ex"
  ],
  "abstract": "There are some discrepancies in the low energy data on the photoabsorption cross section of $^4$He. We calculate the cross section with realistic nuclear forces and explicitly correlated Gaussian functions. Final state interactions and two- and three-body decay channels are taken into account. The cross section is evaluated in two methods: With the complex scaling method the total absorption cross section is obtained up to the rest energy of a pion, and with the microscopic $R$-matrix method both cross sections $^4$He($\\gamma, p$)$^3$H and $^4$He($\\gamma, n$)$^3$He are calculated below 40\\,MeV. Both methods give virtually the same result. The cross section rises sharply from the $^3$H+$p$ threshold, reaching a giant resonance peak at 26--27\\,MeV. Our calculation reproduces almost all the data above 30\\,MeV. We stress the importance of $^3$H+$p$ and $^3$He+$n$ cluster configurations on the cross section as well as the effect of the one-pion exchange potential on the photonuclear sum rule.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-02-02T06:00:51.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "21.60.De",
      "25.40.Lw",
      "25.20.Dc",
      "27.10.+h"
    ],
    "keywords": [
      "ab initio study",
      "total absorption cross section",
      "photoabsorption cross section",
      "three-body decay channels",
      "photonuclear sum rule"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevC.85.054002",
      "journal": "Physical Review C",
      "year": 2012,
      "month": "May",
      "volume": 85,
      "number": 5,
      "pages": "054002"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1087210,
      "adsabs": "2012PhRvC..85e4002H"
    }
  }
}