Pu-241

Pu-241 is isotope of Plutonium.

mass: 241.057 amu

Maging

U-238 + n $ \rightarrow$ Np-239

Np-239 $ \xrightarrow[~]{\beta^-}$ Pu-239

Using

$ \rm ^{241}_{~94}Pu \xrightarrow[15.4~y]{\beta^-,~ 21\,KeV} {} ^{241}_{~95}Am \xrightarrow[432.7\,y]{\alpha,\, 4.959\,MeV} {}^{237}_{~96}Np \xrightarrow[2.4 \times 10^6\,y]{\alpha,~4.958 \,MeV} \mathrm{^{233}_{91}Pa} ~.\,.\,. $

References

https://en.wikipedia.org/wiki/Plutonium-241

Keywords

Am-241, Relaxation heat