[en] A molecular orbital theory is formulated based on α transfer for the interpretation of subbarrier fusion enhancement. The molecular potential induced by α transfer causes the enhancement of the fusion. The fusion cross section is calculated for the ²⁴Mg + ³²S case. Good fits to experimental data can be reached naturally

[en] The oscillatory structure appeared in the differential cross section of the reaction for ¹⁶O(¹⁶O, ¹²C)²⁰Ne may be explained by particle transfer from covalent channel to ionic channel in the nuclear molecular orbital theory

[en] In the differential cross sections for the elastic scattering between an α-conjugate target and projectile, a rising oscillatory structure is often observed in the backward-angle region. An α-transfer mechanism is proposed to explain this anomalous phenomenon. A nuclear molecular-orbit approximation theory for both 1α- and 2α-transfer processes has been formulated and applied to ¹⁶O+²⁰Ne and ¹²C+²⁰Ne scattering systems with different projectile energies. The experimental rising structures shown in these scatterings are well reproduced with parameters fairly consistent with spectroscopic data. An independent-α-particle model wave function has been used for the evaluation of the exchange potential, which gives better agreement with experiment than the Buttle-Goldfarb approximation can usually provide. (orig.)

[en] Within the framework of meson exchange theory, the N-N interaction is derived by a classical field method from a chiral σ-ω model. The nuclear potential derived is similar to the ordinary one boson exchange potential

[en] Resonant structures appeared in the excitation functions for the ¹⁶O + ²⁰Ne elastic scattering have been studied by the nuclear molecular orbital theory. The theoretical results agree will with the experimental data

[en] As two skyrmions overlap, a molecular-like binding may arise. This may be one of the main sources of missing intermediate range attraction in NN interaction. The attraction is found to be strong enough to form bound state of two nucleons. It seems then that one no longer needs to introduce phenomenologically scalar meson which has never been observed

[en] In the excitation function for the elastic scattering between an α-conjugate target and projectile, there often exist intermediate structures which cannot be interpreted easily either by conventional optical potential model or statistical theory. A nuclear molecular-orbital approximation theory for the α-transfer mechanism has been formulated and applied to the ²⁴Mg(¹⁶O,¹²C)²⁸Si reaction. The excitation function at θ_c.m. = 0⁰ and differential cross section in the whole angle region at three different energies E_c.m. = 27.8, 30.8 and 36.2 MeV are calculated. The calculations reproduce well these experimental curves with a common set of parameters. The intermediate structures shown naturally in the excitation function and the anomalous oscillatory structures appear in the whole angle region of the differential cross section. (orig.)

[en] Based on the scattering theory of KMT and FGH we calculate the nucleon-nucleus optical potentials of ⁴He, ¹⁶O and ⁴⁰Ca from the Paris N-N potential given by M. Lacombe et al. The real part Vsub(R)(r) of our optential has the form of Woods-Saxon when the kinetic energy E of the incident nucleon is low. The depth of Vsub(R)(r) will decrease as E increases, and it turns into positive in the interior of nucleus when E approx.= 300 MeV. The repulsive effect in the interior of nucleus increases rapidly as E increases even more, butthere always exists some attractive effect at the surface of nucleus. Therefore, Vsub(R)(r) has generally the wine-bottle bottom shape. We also calculate the quatity Jv/N = (4π/N)∫sub(0)sub(infinity)Vsub(R)(r)r²dr. Our results are basically in acordance with those of M.Jaminon et al's relativistic Hatree calculation as well as the experimental results. In this work we also calculate the imaginary part of optical potential and its variation with the kinetic energy of the incident nucleon

[en] The mechanism of transfering a cluster of nucleons between two colliding nuclei is considered to explain the backward angle oscillatory rise in the differential cross section of the elastic scattering between certain nuclei, such as ¹⁶O + ²⁴Mg or ²⁰Ne + ²⁴Mg. The nuclear molecular orbit approximation theory is applied. For one-step transfer, if the parameter involved is assumed to be adjustable, the numerical calculations can be made to fit the experimental results naturally

[en] A phenomenological parity-dependent potential has been obtained for analysing resonant structure in the ¹⁶O+²⁰Ne system with a deep optical potential and is compared with the potential from the linear combination of nuclear orbital model. This potential agrees in both sign and magnitude in the tail region with the calculation, and the former is roughly an envelope curve of the latter. (orig.)