{
  "id": "1701.00869",
  "version": "v1",
  "published": "2017-01-03T23:43:48.000Z",
  "updated": "2017-01-03T23:43:48.000Z",
  "title": "Non-coherent character of isoscalar pairing probed with Gamow-Teller strength: New insight into $^{14}$C dating $β$ decay",
  "authors": [
    "Yutaka Utsuno",
    "Yoshitaka Fujita"
  ],
  "comment": "5 pages, 3 figures",
  "categories": [
    "nucl-th",
    "nucl-ex"
  ],
  "abstract": "We investigate the phase coherence of isoscalar pairs from the $B({\\rm GT};0^+_1\\,T\\!=\\!1 \\to 1^+_1\\,T\\!=\\!0)$ values in two-particle configurations of $A=6$, 18, and 42 nuclei and two-hole configurations of $A=14$ and 38 ones. We find that these Gamow-Teller (GT) matrix elements are always constructive and thus enlarged under isovector- and isoscalar-pairing Hamiltonians, whereas the observed GT strengths are strongly hindered for the two-hole configurations, including the famous $^{14}$C dating $\\beta$ decay. This indicates that the actual isoscalar pair, unlike the isovector pair, has no definite phase coherence, which can work against forming isoscalar-pair condensates.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-01-03T23:43:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "gamow-teller strength",
      "non-coherent character",
      "two-hole configurations",
      "actual isoscalar pair",
      "definite phase coherence"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}