GROUND STATE OCCUPATION PROBABILITIES OF VALENCE NUCLEON PAIRS IN EVEN-EVEN NUCLEI IN THE NILSSON MEAN-FIELD PLUS THE NEAREST-ORBIT PAIRING MODEL

摘要

Binding energies and even-odd mass differences of rare-earth 160?170Er nuclei are calculated by using the exactly solvable mean-filed plus nearest-orbit pairing model and compared with the corresponding experimental values.And the ground state occupation probabilities of valence nucleon pairs with definite angular momentum quantum number for 160;162;164Er in the model fitted are calculated.The analysis shows that the ground state occupation probabilities with even angular momenta are much larger than those with odd angular momenta.The results clearly indicate that S,D,and G valence nucleon pairs dominate in the ground state of these nuclei.