ESTADOS YRAST YRAST STATES 4 EIGENFUNCTIONS 2 FUNCIONES PROPIAS 2 HARMONIC POTENTIAL 2 MOMENTO ANGULAR 2 POTENCIAL ARMONICO 2 Application of the yrast concept to the pairing degree of freedom 1 BOHR APPROXIMATION 1 CINETICA 1 Collective treatment of the pairing hamiltonian IV. The Yrast approximation 1 EVEN-ODD NUCLEI|NUCLEOS PAR-IMPAR 1 High spin states in 218 Ra 1 INTERACCIONES DE PARIDAD 1 ISOTOPOS DE RADIO 1 Microscopic description of yrast states in spherical nuclei 1 NICKEL 56 TARGET 1 NUCLEAR REACTIONS 1 OPERADORES DEL SPIN DE PAULI 1 PAIRING INTERACTIONS 1 PAULI SPIN OPERATORS 1 RADIUM ISOTOPES 1 REACCIONES NUCLEARES 1 VECTORES 1 VECTORS 1