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Particles and Nuclei Sub-Library: Version 0.910
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Semi-empirical mass formula. More...
#include <nuclear_mass.h>
A simple semi-empirical mass formula of the form
where the pairing energy is given by
which is equivalent to the traditional prescription
when and
and integers.
There is an example of the usage of this class given in Nuclear mass fit example.
Definition at line 405 of file nuclear_mass.h.
Public Member Functions | |
virtual const char * | type () |
Return the type, "semi_empirical_mass" . | |
virtual double | mass_excess_d (double Z, double N) |
Given Z and N , return the mass excess in MeV. | |
virtual int | fit_fun (size_t nv, const ovector_base &x) |
Fix parameters from an array for fitting. | |
virtual int | guess_fun (size_t nv, ovector_base &x) |
Fill array with guess from present values for fitting. | |
Data Fields | |
double | B |
Binding energy (negative and in MeV, default -16) | |
double | Sv |
Symmetry energy (in MeV, default 23.7) | |
double | Ss |
Surface energy (in MeV, default 18) | |
double | Ec |
Coulomb energy (in MeV, default 0.7) | |
double | Epair |
Pairing energy (MeV, default 13.0) |
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