{
  "id": "1505.02275",
  "version": "v1",
  "published": "2015-05-09T14:28:14.000Z",
  "updated": "2015-05-09T14:28:14.000Z",
  "title": "Reaction rates of $^{64}$Ge($p,γ$)$^{65}$As and $^{65}$As($p,γ$)$^{66}$Se and the extent of nucleosynthesis in type I X-ray bursts",
  "authors": [
    "Y. H. Lam",
    "J. J. He",
    "A. Parikh",
    "B. A. Brown",
    "M. Wang",
    "B. Guo",
    "Y. H. Zhang",
    "X. H. Zhou",
    "H. S. Xu"
  ],
  "comment": "23 pages, 5 figures",
  "categories": [
    "astro-ph.SR",
    "nucl-th"
  ],
  "abstract": "The extent of nucleosynthesis in models of type I X-ray bursts and the associated impact on the energy released in these explosive events are sensitive to nuclear masses and reaction rates around the $^{64}$Ge waiting point. Using a recent high precision mass measurement of $^{65}$As along with large-scale shell model calculations, we have determined new thermonuclear rates of the $^{64}$Ge($p$,$\\gamma$)$^{65}$As and $^{65}$As($p$,$\\gamma$)$^{66}$Se reactions. We examine the impact of available rates for these two reactions through a representative one-zone X-ray burst model. We find that our recommended rates may strongly suppress the flow of abundances toward $A\\approx100$, in sharp contrast to recent work claiming that $^{64}$Ge is not a significant $rp$-process waiting point. Indeed, the summed mass fractions for species with $A > 70$ varies by about factors of 3 or 2 depending upon the adopted $^{64}$Ge($p$,$\\gamma$)$^{65}$As or $^{65}$As($p$,$\\gamma$)$^{66}$Se rates, respectively. Furthermore, the predictions for nuclear energy generation rate E$_\\mathrm{gen}$ at late times during the burst varies rather significantly between the models using the different rates, with differences as large as about a factor of 2.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-05-09T14:28:14.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "reaction rates",
      "nucleosynthesis",
      "nuclear energy generation rate",
      "representative one-zone x-ray burst model",
      "large-scale shell model calculations"
    ],
    "publication": {
      "doi": "10.3847/0004-637X/818/1/78"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1369062
    }
  }
}