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1·Low-lying collective spectrum of a nucleus depends on its nucleon number.

原子核的低能集体谱依赖于它的核子数。

2·The result shows that the transition from vibrational to rotational spectrum is mainly caused by the increase of valence nucleon number.

结果表明，从振动能谱向转动能谱的过渡主要是由价核子数增加引起的。

3·The present paper reports the average nucleon number density in the intrinsic states of SU(3) of the Fermion Dynamical Symmetry Model (FDSM).

给出了费米子动力学对称模型中的SU（3）对称极限的内禀态下的平均核子数密度。