, the ratio of the number of atoms of a given nuclide in a mass chain to the sum of the atoms of all nuclides in the mass chain;(2) the number of kilocuries per kiloton of fission;(3) the number of roentgens per hour per kiloton per square mile. Each decay chain diagram is ...
239Pu purity at EoC UN-2 The actinium isotope 227Ac is a transient member of the uranium-actinium series decay chain, which begins with the parent isotope 235U (or 239Pu) and ends with the stable lead isotope 207Pb. WikiMatrix
Alpha-decay branching ratios to high-lying excited-states of the 242Cm→238pu→ 234U →230Th→226Rn decay chain We present a systematic calculation on the 0c-decay branching ratios to excited-states of an even-even α-decay chain 242Cm→238pu→234U →230Th→226Rn by the improved barrier...
From the reaction 239Pu(nth,f) 21 out of 34 detected TP's were new. The energy distributions and yields of the TP's are given. The yields of TP's as a function of mass number depend on the mass of the decaying compound nucleus. Heavy TP's are increasingly favored in the decay of...
A relatively large piece of plutonium is warm to the touch because of the energy given off in alpha decay. Larger pieces will produce enough heat to boil water. The metal readily dissolves in concentrated hydrochloric acid, hydroiodic acid, or perchloric acid. The metal exhibits six allotropic ...
The 238Pu, formed through decay of 242Cm, is responsible for much of the Pu decay heat because of its short half-life (87.74 a). The 239Pu is fissile and can be used as fuel for a chain reaction in a reactor or a nuclear weapon. Weapon makers prefer a high enrichment in 239Pu ...
关键词: engineering plutonium 239 criticality configuration organic moderators actinide isotopes actinide nuclei alpha decay radioisotopes even-odd nuclei heavy nuclei 年份: 1977 收藏 引用 批量引用 报错 分享 全部来源 求助全文 osti.gov 相似文献Comparison of ENDF/B-Ⅵ and Preliminary ENDF/B-Ⅶ Results ...
Pu-239 + 240 and Pu-238 were also performed. In 1972 the total accumulated deposition of Pu-241 was 8 mCi/km2of Pu-239 + 240 1 mCi/km2and of Am-241 0.2 mCi/km2. About 80% of the Am-241 activity has been formed in situ from decay of Pu-241. The biological mean-residence time...
Effect of the electron decay of metallic fission products on the chemical and phase compositions of an irradiated uranium-plutonium fuel A complex structure is shown to form in the uranium-plutonium nitride U0.8Pu0.2N irradiated by fast neutrons. It consists of a uranium-based solid solution......
We experimentally defined 48 target mRNAs of PUM1-mediated decay according to the following criteria: (1) the transcript bound to PUM1 and (2) the stability of the transcript increased in PUM1-depleted cells. In contrast, we found that PUM2 had a small effect on mRNA degradation in the ...