PaperPanorama

Nuclear Theory·nucl-th

Thursday·January 12, 2017

5 papers3 primary·2 cross-listed

  1. 01

    Applications of Nuclear Physics

    Anna C. Hayes

    Today the applications of nuclear physics span a very broad range of topics and fields. This review discusses a number of aspects of these applications, including selected topics and concepts in nuclear reactor physics, nuclear fusion, nuclear non-proliferation, nuclear-geophysics, and nuclear medicine. The review begins with a historic summary of the early years in applied nuclear physics, with an emphasis on the huge developments that took place around the time of World War II, and that underlie the physics involved in designs of nuclear explosions, controlled nuclear energy, and nuclear fusion. The review then moves to focus on modern applications of these concepts, including the basic concepts and diagnostics developed for the forensics of nuclear explosions, the nuclear diagnostics at the National Ignition Facility, nuclear reactor safeguards, and the detection of nuclear material production and trafficking. The review also summarizes recent developments in nuclear geophysics and nuclear medicine. The nuclear geophysics areas discussed include geo-chronology, nuclear logging for industry, the Oklo reactor, and geo-neutrinos. The section on nuclear medicine summarizes the critical advances in nuclear imaging, including PET and SPECT imaging, targeted radionuclide therapy, and the nuclear physics of medical isotope production. Each subfield discussed requires a review article onto itself, which is not the intention of the current review. Rather, the current review is intended for readers who wish to get a broad understanding of applied nuclear physics.

    nucl-thnucl-exRept.Prog.Phys.(2017)·11 citations
  2. 02

    Reduced 1 -factor of C(,)O

    M. Katsuma

    The astrophysical -factor of 1 transition for C(,)O is discussed in the -matrix theory. The reduced -particle widths of the 1 ( MeV) and 1 ( MeV) states are extracted from the result of the potential model. The formal parameters are obtained without the linear approximation to the shift function. The resultant 1 -factor is not strongly enhanced by the subthreshold 1 state if the channel radius is 4.75 fm. The calculated -delayed -particle spectrum of N and the -wave phase shift of +C elastic scattering are also found to be consistent with the previous studies. The small channel radius leads to the low penetrability to the Coulomb barrier, and it makes the reduced 1 -factor below the barrier. Owing to the large reduced width from the molecular structure, the -matrix pole of the 1 state is shifted in the vicinity of 1. The proximity of the two poles suppresses the interference between the states. The transparency of the +C system appears to be expressed as the shrinking strong interaction region.

    nucl-thastro-ph.SRnucl-ex2 citations
  3. 03

    On the microscopic structure of , and vertices

    Ju-Hyun Jung🇦🇹 · Wolfgang Schweiger🇦🇹

    We use a hybrid constituent-quark model for the microscopic description of , and vertices. In this model quarks are confined by an instantaneous potential and are allowed to emit and absorb a pion, which is also treated as dynamical degree of freedom. The point form of relativistic quantum mechanics is employed to achieve a relativistically invariant description of this system. Starting with an spin-flavor symmetric wave function for and , i.e. the eigenstates of the pure confinement problem, we calculate the strength of the , and couplings and the corresponding vertex form factors. Interestingly the ratios of the resulting couplings resemble strongly those needed in purely hadronic coupled-channel models, but deviate significantly from the ratios following from SU(6) spin-flavor symmetry in the non-relativistic constituent-quark model.

    nucl-thFew Body Syst.(2017)·3 citations

Affiliations

first authorsco-authorsvia INSPIRE