Return the released energy from a nuclear reaction.
str(optional, positional argument only)) – A string representing the reaction, like
"D + T --> alpha + n"or
"Be-8 --> 2 * He-4".
energy – The difference between the mass energy of the reactants and the mass energy of the products in a nuclear reaction. This quantity will be positive if the reaction is exothermic (releases energy) and negative if the reaction is endothermic (absorbs energy).
- Return type
ParticleError – If the reaction is not valid, there is insufficient information to determine an isotope, the baryon number is not conserved, or the charge is not conserved.
TypeError – If the positional input for the reaction is not a string, or reactants and/or products is not of an appropriate type.
finds the binding energy of an isotope
This function requires either a string containing the nuclear reaction, or reactants and products as two keyword-only lists containing strings representing the isotopes and other particles participating in the reaction.
>>> from astropy import units as u >>> nuclear_reaction_energy("D + T --> alpha + n") <Quantity 2.8181e-12 J> >>> triple_alpha1 = '2*He-4 --> Be-8' >>> triple_alpha2 = 'Be-8 + alpha --> carbon-12' >>> energy_triplealpha1 = nuclear_reaction_energy(triple_alpha1) >>> energy_triplealpha2 = nuclear_reaction_energy(triple_alpha2) >>> print(energy_triplealpha1, energy_triplealpha2) -1.471430e-14 J 1.1802573e-12 J >>> energy_triplealpha2.to(u.MeV) <Quantity 7.3665870 MeV> >>> nuclear_reaction_energy(reactants=['n'], products=['p+', 'e-']) <Quantity 1.25343e-13 J>