 151Eu is the beta decay product of samarium @-@ 151 , but since this has a long decay half @-@ life and short mean time to neutron absorption , most 151Sm instead ends up as 152Sm . 
 151Eu <a href='drop_aux' title='1'><mark>is</mark></a>the beta decay product of samarium @-@ 151 , but since this <a href='got' title='2'><mark>has</mark></a> a long decay half @-@ life and short mean time to neutron absorption , most 151Sm instead <a href='uninflect' title='3'><mark>ends</mark></a> up as 152Sm . 
151Eu da beta decay product of samarium @-@ 151 , but since this got a long decay half @-@ life and short mean time to neutron absorption , most 151Sm instead end up as 152Sm .