Eur. Phys. J. A (2004) 21: 227-236
https://doi.org/10.1140/epja/i2003-10209-9

Monte Carlo methods for yrast spectroscopy

¹ Dipartimento di Fisica dell’Universitá di Milano, I-20133, Milano, Italy
² INFN sezione di Milano, Milano, Italy

^* e-mail: giovanni-puddu@mi.infn.it

Abstract

We discuss the details of the recently proposed Monte Carlo method to evaluate the exact energies of yrast levels. Energy levels are evaluated up to J = 18 with small statistical errors using the Metropolis method for the case of ¹⁶⁶Er using the pairing plus quadrupole model within one major shell. We also discuss the evaluation of the probabilities of the Hartree-Fock-Bogoliubov wave functions in the corresponding yrast eigenstates and they are found to be large. The model displays a too strong backbending behaviour not seen experimentally.