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- W2274466408 abstract "The radiations of 5-day electron-capturing ${mathrm{Bk}}^{245}$ were measured with electron spectrometer, scintillation spectrometer, and alpha pulse analyzer. Conversion electrons from 250-kev and ensuremath{sim}390-kev transitions were observed. The electromagnetic spectrum contains $L$ and $K$ x-rays and 250- and 380-kev gamma rays. The relative contributions to the x-ray intensities from the primary capture processes and from excited state conversions were determined by counting coincidences between the electromagnetic radiations. ${mathrm{Bk}}^{245}$ decays primarily by electron capture ($frac{L}{K}=0.33$) to a 250-kev level in ${mathrm{Cm}}^{245}$. The $K$ and $L$ conversion coefficients of the 250-kev transition are 1.76 and 0.44, respectively, indicating that the transition is $M1$. About 6% branching decay goes to a level at 630 kev. The lifetimes of the excited states are less than 2ifmmodetimeselsetexttimesfi{}${10}^{ensuremath{-}9}$ sec. The intensity of alpha-particle emission is 1.05ifmmodetimeselsetexttimesfi{}${10}^{ensuremath{-}3}$ per disintegration (alpha half-life 13 yr). Three alpha groups were resolved: 5.89 Mev (26%), 6.17 Mev (41%), and 6.37 Mev (33%)." @default.
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- W2274466408 date "1956-05-15" @default.
- W2274466408 modified "2023-09-24" @default.
- W2274466408 title "Properties of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant=normal>Bk</mml:mi></mml:mrow><mml:mrow><mml:mn>245</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>" @default.
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- W2274466408 doi "https://doi.org/10.1103/physrev.102.1097" @default.
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