Assertion: erbium's isotope | /r/HasAspect | high cross sections
Facets:
value: as with other lanthanides
type: OTHER
value: for neutron capture
type: PURPOSE
Source sentences:
text: As with other lanthanides, many isotopes of europium, especially those that have odd mass numbers or are neutron-poor like 152Eu, have high cross sections for neutron capture, often high enough to be neutron poisons.