Caesium-135

Long-lived fission products
t^½(my)		Yield%	KeV	β
⁹⁹Tc	.211	6.0507	294
¹²⁶Sn	.230	.0236	4050	γ
⁷⁹Se	.295	.0508	151
⁹³Zr	1.53	6.2956	91	γ
¹³⁵Cs	2.3	6.3333	269
¹⁰⁷Pd	6.5	.1629	33
¹²⁹I	15.7	.6576	194	γ

Its precursor Cs-134 and then Cs-135.

¹³⁵Cs's thermal neutron capture cross section and Cs-137 makes handling difficult. [3]

See also

Categories: Fission products

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