#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the Common Development
# and Distribution License Version 1.0 (the "License").
#
# You can obtain a copy of the license at
# http://www.opensource.org/licenses/CDDL-1.0.  See the License for the
# specific language governing permissions and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each file and
# include the License file in a prominent location with the name LICENSE.CDDL.
# If applicable, add the following below this CDDL HEADER, with the fields
# enclosed by brackets "[]" replaced with your own identifying information:
#
# Portions Copyright (c) [yyyy] [name of copyright owner]. All rights reserved.
#
# CDDL HEADER END
#

#
# Copyright (c) 2013--2019, Regents of the University of Minnesota.
# All rights reserved.
#
# Contributors:
#    Ryan S. Elliott
#


This directory contains a model consisting of the superposition of two shifted
Morse pair potentials with different cutoffs.

   phi_i(r) = epsilon_i * ( - exp[ -2*C_i*(r - Rzero_i) ]
                            + 2*exp[ -C_i*(r - Rzero_i) ] )
            + shift_i,

for i=1,2 and where shift_i is computed so that phi_i(rcut_i) = 0.0.  The model
uses two neighbor lists with different cutoffs and does not request neighbors
of non-contributing particles.
