Question

Hi guys! I don't understand why the total angular momentum of deuterium is l(/aɪ/)=1. What are the values for total spin S and L? thanks

Answer 1

the angular momentum of deuterium is = angular momentum of 1 protons + 1 neutron

Answer 2

for proton:
spin = 1/2
for neutron:
spin = 1/2

I guess the orbital quantum number is zero for both

Answer 3

ok but if I told you that the total angular momentum I=1 and S=1 so for L I can write:
\[|I-S|\le L \ge L+S\] and so L can asuume the values 0,1,2 but the teory says that L=1 is forbidden by violation of parity! the question is: how can I get L=2?