| εn | The emitted neutron energy. | R | The nuclear radius. |
| Γp | The decay width for a proton. | Mn | The mass of the neutron. |
| Γn | The decay width for a neutron. | Bn | The separation energy of the neutron. |
| Sp, Sn | The spin statistical factors. | En | The incident neutron energy. |
| Mp | The mass of proton. | σR | The reaction cross-section. |
| Bp | The separation energy of the proton. | a1 | Coulomb constant. |
| δp, δn | The odd-even characters of the nucleus. | a2 | The symmetry parameter. |
| Ea | The excitation energy of the compound nucleus. | a3 | Coulomb barrier. |
| Eb | The excitation energy the residual nuclei. | A | The mass number. |
| Vp | The coulomb barrier of the proton. | Z | The atomic number. |
| εp | The emitted proton energy. | α, β | The fitting parameters. |
| σc | The cross-section of the reverse process. | δ | The odd-even character. |
| σR | The reaction or formation cross-section for 14 MeV neutrons. | ||