PUBLISHED IN: Physical Review Letters 108 052501 (2012)
(LANL PREPRINT LA-UR-10-06451)

New Finite-Range Droplet Mass Model and Equation-of-State Parameters



P. Möller and W. D. Myers
Theoretical Division, Los Alamos National Laboratory, Los Alamos,
New Mexico 87545, USA

H. Sagawa
Center for Mathematical Sciences, University of Aizu,
Aizu-Wakamatsu, Fukushima 965-8580, Japan

S. Yoshida
Science Research Center, Hosei University, 2-17-1 Fujimi, Chiyoda, Tokyo 102-8160, Japan

A 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 EOS. 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 AME2003 for FRDM-2011a, compared to σ = 0.669 MeV for FRDM (1992)
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Created: Feb 21 2012 --> Last modified: Thu July 5 2012