The isotope 125B having a mass 12.014 u undergoes β− decay to 126C. 126C has an excited state of the nucleus (126C∗) at 4.041 MeV above its ground state. If 125B decay to 126C∗, the maximum kinetic energy of the β− particle in units of MeV nearly is (integer only).Take : m(126C)=12.0 u(1u=931.5 MeV/c2,Where c is the speed of light in vacuum)

The isotope 125B having a mass 12.014 u undergoes β− decay to 126C.

1.	The isotope 125B having a mass 12.014 u undergoes β− decay to 126C. 126C has an excited state of the nucleus (126C∗) at 4.041 MeV above its ground state. If 125B decay to 126C∗, the maximum kinetic energy of the β− particle in units of MeV nearly is (integer only).Take : m(126C)=12.0 u(1u=931.5 MeV/c2,Where c is the speed of light in vacuum)
Answer» The isotope $_{5}^{12} B$ having a mass $12.014 u$ undergoes $β -$ decay to $_{6}^{12} C ._{6}^{12} C$ has an excited state of the nucleus $(_{6}^{12} C^{})$ at $4.041 MeV$ above its ground state. If $_{5}^{12} B$ decay to $_{6}^{12} C^{},$ the maximum kinetic energy of the $β -$ particle in units of $MeV$ nearly is (integer only). Take : $m (_{6}^{12} C) = 12.0 u (1 u = 931.5 MeV / c^{2}, Where c is the speed of light in vacuum)$