<page_title> Behavior of nuclear fuel during a reactor accident </page_title> <section_title> Genesis of 134Cs </section_title> <table> <cell> Cs <col_header> Element </col_header> <col_header> In </col_header> <col_header> Sn </col_header> <col_header> Sb </col_header> <col_header> Te </col_header> <col_header> Te </col_header> <col_header> I </col_header> <col_header> Xe </col_header> </cell> <cell> 133 <col_header> Isotope </col_header> <row_header> Cs </row_header> </cell> <cell> stable (undergoes neutron activation in the core) <col_header> half life </col_header> <row_header> Cs </row_header> </cell> <cell> Cs <col_header> Element </col_header> <col_header> In </col_header> <col_header> Sn </col_header> <col_header> Sb </col_header> <col_header> Te </col_header> <col_header> Te </col_header> <col_header> I </col_header> <col_header> Xe </col_header> <col_header> Cs </col_header> </cell> <cell> 134 <col_header> Isotope </col_header> <row_header> Cs </row_header> </cell> </table>
The ¹³⁴Cs is the precursor to ¹³³Cs isotope which is stable.