<page_title> Isotopes of samarium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 153Sm <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 46.284(4) h <col_header> half-life </col_header> </cell> <cell> β− <col_header> decay mode(s) </col_header> </cell> <cell> 153Eu <col_header> daughter isotope(s) </col_header> </cell> </table>
¹⁵³Sm has a half-life of 46.3 hours, undergoing β− decay into ¹⁵³Eu.