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Nuclear Theory·nucl-th

Wednesday·March 16, 2016

8 papers—2 primary·6 cross-listed

All8Primary2Cross-lists6
  1. 01

    [Submitted on 15 Mar 2016]

    Searching for in Relativistic Heavy Ion Collisions

    Jiaxin Zhao🇨🇳 · Hang He🇨🇳 · Pengfei Zhuang🇨🇳

    We study the doubly charmed baryon in high energy nuclear collisions. We solve the three-body Schroedinger equation with relativistic correction and calculate the yield and transverse momentum distribution via coalescence mechanism. For production in central Pb+Pb collisions at LHC energy, the yield is extremely enhanced, and the production cross section per binary collision is one order of magnitude larger than that in p+p collisions. This indicates that, it is most probable to discover in heavy ion collisions and its discovery can be considered as a probe of the quark-luon plasma formation.

    Comments:
    5 pages and 4 figures
    Subjects:
    Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
    arXiv:
    1603.04524 [pdf]
    PLB(2017)·30 citations
  2. 02

    [Submitted on 15 Mar 2016]

    Optimum orientation versus orientation averaging description of cluster radioactivity

    W. M. Seif · M. Ismail · A. I. Refaie · L. H. Amer

    Background: The deformation of the nuclei involved in the cluster decay of heavy nuclei affect seriously their half-lives against the decay. Purpose: We investigate the description of the different decay stages in both the optimum orientation and the orientation-averaged pictures of the cluster decay process. Method: We consider the decays of 232,233,234U and 236,238Pu isotopes. The quantum mechanical knocking frequency and penetration probability based on the Wentzel-Kramers-Brillouin approximation are used to find the decay width. Results: We found that the orientation-averaged decay width is one or two orders of magnitude less than its value along the non-compact optimum orientation. The difference between the two values increases with decreasing the mass number of the emitted cluster. Correspondingly, the extracted preformation probability based on the averaged decay width increases with the same orders of magnitude compared to its value obtained considering the optimum orientation. The cluster preformation probabilities (Sc) obtained in the two considered schemes give more or less comparable agreement with the Blendowske-Walliser (BW) formula based on the preformation probability of Sa(ave.) obtained from the orientation-averaging scheme. All the obtained results, including those obtained in the optimum-orientation scheme, deviate substantially from the BW law based on Sa(opt.) obtained using the optimum-orientation scheme. Conclusion: In order to account for deformations of the participating nuclei, it is more relevant to calculate the decay width by averaging over the different possible orientations of the participating deformed nucleus, rather than considering the corresponding non-compact optimum orientation.

    Subjects:
    Nuclear Theory (nucl-th)
    arXiv:
    1603.04646 [pdf]
    J.Phys.G(2016)·24 citations

Affiliations

first authorsco-authorsvia INSPIRE