RESONANCE GROUP METHOD FOR OMITTING EXCHANGE EFFECTS OF NUCLEAR CORE

Abstract：

(a) In order to avoid the tedious calculation in RGM, a reduced RGM which omit the exchange effects of nuclear core is proposed starting from physic considerations (Briefly, this is called QRGM). For a three-cluster system A+(BC), if C is a double-closed cluster, the QRGM abandons the antisymmetric procedure and various exchange forces between nuclear core C and other two clusters, but it still retains those between other non-closed clusters. (b) According to this model, the general formulae of three-cluster system under single channel treatment are derived. (c) Using the QRGM to d+a system, the phase shifts and differential cross sections of elastic scattering processes are calculated and the results agree well to the experiment data. This shows essentially that the QRGM is simple and effective (It is worth mentioning that by using QRGM. The satisfactory results are also obtained in the study of three-cluster system n+⁶Li(d+a). We shall report this in another paper.) (d) The exchange effects in d+a scattering is discussed.