hello everyone. my doubt is pertaining to k-capture. i hope you all know it. if not, in some higher nuclides the nucleus may capture the k shell electron and the proton present inside the nucleus and the electron captured they combine to form a neutron.
to make things much simple look at this example
eg: barium--(by k capture)-------> cesium + x-ray
so here
proton + electron------------> neutron
but when i took the conservation of mass in to account the mass i obtained by adding the masses of proton and electron is slightly less than the neutron
so what i thought was may be there is some another particle involved in the above reaction(i,e p + e = n)
let me tell you the values also i've obtained when i took the difference between neutron mass and the mass which i've obtained on adding up the masses of proton and electron
1) in kgs it is 0.0014 * 10^-27
2)in amu it is 0.00086