Interpret and compare the output of RESNUCLEi and usrrnc.f

[ceruttif (Francesco Cerutti)]

@hanhechong

The I130 and Xe130 must be the radioactive decay products of Te130.

Yes.

@hanhechong

My understanding is that the RESNUCLEi will not score the decay product without DCYSCORE.

Correct.

@hanhechong

So if I am interested in the total production of isotopes, it’s better to use usrrnc.f?

No: since you are asking for radioactive decay in semi-analogue mode (which is not meant to be associated to any cooling time), RESNUCLEi will give you in this case the same production yields (and not activities) as usrrnc.f, including daughter nuclides, provided that you input a DCYSCORE card that is asking to include them in the RESNUCLEi output.
RESNUCLEi returns activities only when associated by DCYSCORE to a given cooling time, but this is not an option in case of radioactive decay in semi-analogue mode.