Saved Bookmarks
| 1. |
Calculate the threshold kinetic energies of protons required to activate the reactions (p,n) and (p,d) with Li^(7) nuclei. |
|
Answer» Solution :The `Q` of the reaction `LI^(7)(p,N)Be^(7)` was calculated in problem 266(a). It is `-1.64MeV` Hence, the threshold `K.E`. Of proton for initiating this reaction is `T_(th)=(1+(m_(p))/(m_(Li)))|Q|=(8)/(7)xx1.64= 1.64= 1.87MeV` For the reaction `Li^(7)(p,d)Li^(6)` we find `Q=(Delta_(Li)^(7)+Delta_(M)-Delta_(d)-Delta_(Li)^(6))c^(2)` `=(0.01601+0.00783-0.01410-0.01513)am uxxc^(2)` `=-5.02MeV` The threshold proton ENERGY for initiating this reaction is `T_(th)=(1-(m_(p))/(m_(Li^(7))))xx|Q|=5.73MeV` |
|