 Like other lanthanides , many isotopes , especially isotopes with odd mass numbers and neutron @-@ poor isotopes like 152Eu , have high cross sections for neutron capture , often high enough to be neutron poisons . 
 Like other lanthanides , many isotopes , especially isotopes with odd mass numbers and neutron @-@ poor isotopes like 152Eu , <a href='got' title='1'><mark>have</mark></a> high cross sections for neutron capture , often high enough to be neutron poisons . 
Like other lanthanides , many isotopes , especially isotopes with odd mass numbers and neutron @-@ poor isotopes like 152Eu , got high cross sections for neutron capture , often high enough to be neutron poisons .