<page_title> Isotopes of ruthenium </page_title> <section_title> List of isotopes </section_title> <table> <cell> 97Ru <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 103Ru <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 39.26(2) d <col_header> half-life </col_header> </cell> <cell> 106Ru <col_header> nuclide symbol </col_header> <col_header> excitation energy </col_header> </cell> <cell> 373.59(15) d <col_header> half-life </col_header> </cell> </table>
The stable isotopes are ¹⁰⁶Ru, with a half-life of 373.59 days; ¹⁰³Ru, with a half-life of 39.26 days and ⁹⁷Ru.