User talk:Double sharp

This user is busy in real life and may not respond swiftly to queries.

Do we have a table of nuclear masses?

I mean a table of masses of bare nuclei, not of atoms.

By energy conservation we have nuclear mass + Z*electron mass - atomic mass = sum of ionization energies. For ⁴He, the left side is

$(4.001506179129+2\times 0.0005485799090441-4.002603254130)\times 931494103.72=79.00662\,\mathrm {eV}$ ,

which is consistent with the sum 79.00514 eV of data given here.

In general, if we need to find nuclear mass, we must also know the data of ionization energies, which are in general incomplete and (more seriously) are suspected to vary for different isotopes of an element. (The calculation above works because the proportion of ³He in natural helium is much, much too tiny). Any idea? 169.155.234.214 (talk) 09:09, 26 December 2024 (UTC)[reply]

Currently away on holiday, so a search will have to wait. But indeed no idea off the top of my head. Double sharp (talk) 05:51, 27 December 2024 (UTC)[reply]