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Particles and Nuclei Sub-Library: Version 0.910
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FRDM semi-empirical mass formula (macroscopic part only with no deformation) More...
#include <frdm_mass.h>
The macroscopic part of the finite-range droplet model from Moller95 .
Using the relations
and
we get
and
Assuming that
and
we get
where 's are
Note that the above relations are somehow self-consistent because they imply
Since we're using (is there a better way?)
with fm, then
.
Fix pairing energy and double vs. int
Document drip_binding_energy(), etc.
Decide on number of fit parameters (10 or 12?) or let the user decide
Document the protected variables
Set the neutron and proton masses and hbarc to Moller et al.'s values
Definition at line 103 of file frdm_mass.h.
Public Member Functions | |
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. | |
virtual double | drip_binding_energy_d (double Z, double N, double npout, double nnout, double chi) |
Return the binding energy in MeV. | |
virtual double | drip_mass_excess_d (double Z, double N, double np_out, double nn_out, double chi) |
Given Z and N , return the mass excess in MeV. | |
Data Fields | |
double | a1 |
Volume-energy constant in MeV (default 16.247) | |
double | J |
Symmetry-energy constant in MeV (default 32.73) | |
double | K |
Nuclear compressibility constant in MeV (default 240) | |
double | a2 |
Surface-energy constant in MeV (default 22.92) | |
double | Q |
Effective surface-stiffness constant in MeV (default 29.21) | |
double | a3 |
Curvature-energy constant in MeV (default 0) | |
double | ca |
Charge-asymmetry constant in MeV (default 0.436) | |
double | W |
Wigner constant in MeV (default 30) | |
double | ael |
electronic-binding constant in MeV (default ![]() | |
double | rp |
Proton root-mean-square radius in fm (default 0.80) | |
double | r0 |
Nuclear-radius constant in fm (default 1.16) | |
double | MH |
Hydrogen atom mass excess, 7.289034 MeV. | |
double | Mn |
Neutron mass excess, 8.071431 MeV. | |
double | e2 |
Electronic charge squared, 1.4399764 MeV fm. | |
double | a |
Range of Yukawa-plus-exponential potential, 0.68 fm. | |
double | aden |
Range of Yukawa function used to generate nuclear charge distribution, 0.70 fm. | |
double | rmac |
Average pairing-gap constant, 4.80 MeV. | |
double | h |
Neutron-proton interaction constant, 6.6 MeV. | |
double | L |
Density-symmetry constant, 0 MeV. | |
double | C |
Pre-exponential compressibility-term constant, 60 MeV. | |
double | gamma |
Exponential compressibility-term range constant, 0.831. | |
double | amu |
Atomic mass unit, 931.5014 MeV. | |
double | nn |
Internal average neutron density. | |
double | np |
Internal average proton density. | |
double | Rn |
Neutron radius. | |
double | Rp |
Proton radius. | |
Protected Attributes | |
double | Deltap |
Proton pairing coefficient. | |
double | Deltan |
Neutron pairing coefficient. | |
double | deltanp |
Isovector pairing coefficient. | |
double | deltabar |
Average bulk nuclear asymmetry. | |
double | epsbar |
Average relative deviation of bulk density. | |
double | Bs |
Desc. | |
double | Bk |
Desc. | |
double | Br |
Desc. | |
double | Bw |
Desc. | |
double | Bv |
Desc. | |
double | c1 |
Coulomb energy coefficient. | |
double | c2 |
Volume redistribution energy coefficient. | |
double | c4 |
Coulomb exchange correction coefficient. | |
double | c5 |
Surface redistribution energy coefficient. | |
double | f0 |
Coefficient for the proton form-factor correction to the Coulomb energy. | |
double | a0 |
Desc. | |
double | B1 |
Desc. | |
double | B2 |
Desc. | |
double | B3 |
Desc. | |
double | B4 |
Desc. |
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