Nuclear Field Theory: Exact Theory or Science Fiction?
To understand the boson behavior of a fermion system is of fundamental importance in many fields of physicsl. In nuclear physics, this problem too has attracted enormous interest because of the successes of the Interacting Boson Model (IBM)2. One possible way to carry out such studies is the nuclear field theory (NFT)3 which was first proposed in 1968 by Mottelson in his attempt to treat the coupling between the so-called elementary excitation modes in nuclei; it may be convenient for this purpose because the bosonic degrees of freedom is contained inherently. Obviously, the nuclear system is a fermion system. Therefore, any theory which professes to describe the system must be equivalent to the fully fermionic theory. From this point of view, it is unfortunate that a solid foundation for the NFT has not been provided for thus resulting either in a limited acceptability of the theory or merely regarded by many as just a model.
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