Non-empirical description of nuclear collective motion with optimized basis for multi-reference density functional theory.

The generator coordinate method (GCM) has been a well-known method to describe nuclear collective motions. In this method, one a priori specifies collective degrees of freedom as inputs of the method based on empirical and/or phenomenological assumptions. We here present an extension of the GCM, in which both the basis Slater determinants and weight factors are optimized in a non-empirical manner. The result for ¹⁶O nucleus with the Skyrme functional suggests that a collective coordinate should be determined in a more complex way than what has been assumed so far. [ABSTRACT FROM AUTHOR]