A tritiun atom (*H) can undergo spontancous radioactive decay into helium-3 ion (*He+) by cmission of a beta particle. The departure of The electron is so fast that to the orbital clectrou the process appears as mply an instantaneous change in the nuclear charge from Z = 1 to Z = 2. I'alculate the probability that the He ion will be left in its ground state.

A tritiun atom (H) can undergo spontancous radioactive decay into helium-3 ion (He+) by cmission of a beta particle. The departure of The electron is so fast that to the orbital clectrou the process appears as mply an instantaneous change in the nuclear charge from Z = 1 to Z = 2. I'alculate the probability that the He ion will be left in its ground state.