This seems like non-news? They're just using the amplitude of neutron emission to encode data. This isn't unique at all to radioactive decay - they're basically

This seems like non-news? They're just using the amplitude of neutron emission to encode data. This isn't unique at all to radioactive decay - they're basically just using AM radio tech over radioactive decay instead of radio waves. It doesn't provide any benefits, it's more just a "neat!" thing.