Characteristics of the Fission Product ${Cs}^{135}$

Two samples of

{Xe}^{135}

of high intensity were prepared at the Los Alamos homogeneous pile. The decay products of the gas contained a Cs activity presumed to be

{Cs}^{135}

. The half-life of

{Cs}^{135}

was found to be (2.1±0.7)×

10^{6}

yr. and the maximum energy of its

β^{-}

-radiations 0.21 Mev. No

γ

-radiations were detected. The capture cross section of

{Cs}^{135}

for pile neutrons was determined to be 14.5±4 barns.

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Characteristics of the Fission ProductCs135