Assertion: actinium's proton | /r/CapableOf | move towards stable isotope
Facets:
Source sentences:
text: For some isotopes with a relatively low n/p ratio, there is an inverse beta decay, by which a proton is transformed into a neutron, thus moving towards a stable isotope; however, since fission almost always produces products which are neutron heavy, positron emission is relatively rare compared to electron emission.