Starting from HFB-6, we have constructed a new mass table, referred to as HFB-8, including all the 9200 nuclei lying between the two drip lines over the range of $Z$ and $N⩾8$ and $Z⩽120$. It differs from HFB-6 in that the wave function is projected on the exact particle number. Like HFB-6, the isoscalar effective mass $M_s^{*}$ is constrained to the value $0.80M$ and the pairing is density independent. The rms errors of the mass-data fit is $0.635\mathrm{MeV}$, i.e. better than almost all our previous HFB mass formulas. The extrapolations of this new mass formula out to the drip lines do not differ significantly from the previous HFB-6 mass formula.

• Received 12 May 2004

DOI:https://doi.org/10.1103/PhysRevC.70.044309