<page_title> Isotopes of terbium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 157Tb <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 71(7) y <col_header> half-life </col_header> </cell> <cell> 158Tb <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 180(11) y <col_header> half-life </col_header> </cell> <cell> 160Tb <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 72.3(2) d <col_header> half-life </col_header> </cell> </table>
The ¹⁵⁸Tb has a half-life of 180 years, ¹⁵⁷Tb has 71 years and ¹⁶⁰Tb has 72.3 days.