(n,γ)反应中巨共振和矮共振的p—n态二相系模型

在原子核的(n,γ)反应中,将受激核看作是由角动量为1的 p-h 整玻色子所组成的“海”、“云”二相系统,在能量简并的情况下,“海”相耦合为巨共振,进一步考虑单粒子和集体态间的相互作用后,简并“解除”并形成亚稳态的连续能级分布。γ—光子穿透云区时产生共振散射而形成5.5MeV 矮共振,对光子强度函数进行计算的结果表明,理论计算与实验的符合程度是令人满意的。

MODEL OF TWO PHASES OF P-H STATE ON GIANT RESONANCE AND PYGMY RESONANCE IN REACTION OF(n,r)

In the reaction of(n,r),anexcited nucleus was regarded as a system with two phases"sea"and"cloud",consisting of P—h state Boson with angalar momentam l=l.The p—h pairs in the"sea"coupled into giantresonance when its en energy was degenerate.Duriny the intereaction between single state and cooperative state the degeneracy disappears and forms sub—stable state,which is in continuous distribution of energy.While ν—photons penetrate through the region of"cloud",the resonance scatters and forms 5.5 Mev pygmy res— onance.The calculation of ν—ray atrong th function shows that the theory corres ponds to experiments,and the result is satisfactory.