title: New finite-range droplet mass model and equation-of-state parameters.
abstract: The parameters in the macroscopic droplet part of the finite-range droplet model (FRDM) are related to the properties of the equation of state. In the FRDM (1992) version, the optimization of the model parameters was not sufficiently sensitive to variations of the compressibility constant K and the density-symmetry constant L to allow their determination. In the new, more accurate FRDM-2011a adjustment of the model constants to new and more accurate experimental masses allows the determination of L together with the symmetry-energy constant J. The optimization is still not sensitive to K which is therefore fixed at K=240  MeV. Our results are J=32.5±0.5  MeV and L=70±15  MeV and a considerably improved mass-model accuracy σ=0.5700  MeV, with respect to the 2003 Atomic Mass Evaluation (AME2003) for FRDM-2011a, compared to σ=0.669  MeV for FRDM (1992).
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. moller@lanl.gov
authors.forename: Peter
authors.initials: P
authors.lastname: Möller
authors.forename: William D
authors.initials: WD
authors.lastname: Myers
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Sagawa
authors.forename: Satoshi
authors.initials: S
authors.lastname: Yoshida