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...
NUCLEAR AND HEAVY ION PHYSICS: Alpha-decay branching ratios to high-lying excited-states of the 242Cm → 238Pu → 234U → 230Th → 226Rn decay chain 衰变分支比衰变链激发态高海拔系统计算实验数据理论值偶数We present a systematic calculation on the α-decay branching ratios to excited-states ...
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 ...
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 Berkelium is produced by bombarding lighter actinides uranium (238U) or plutonium (239Pu)...
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 ...
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......
238Pu-substituted cubic zirconolite (CaPuTi2O7) was stored at ambient temperature, 575 K and 875 K until alpha decay doses of 2.4 to 3.6 脳 1025/m3had been... FW Clinard,DE Peterson,DL Rohr,... - 《Mrs Proceedings》 被引量: 33发表: 1982年 Comparison of Ion‐Beam Irradiation Effects...
In principle, Pu-RG is not suitable for proliferation purposes, due to its high content of even isotopes (Pu238, Pu240, Pu242), which are characterized by a high spontaneous fission rate and, at least in the case of Pu238, by a high decay heat as well. Th content in the considered...
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...
Because of the short β-decay time of 239U compared to the other uranium isotopes (t1/2 = 26.6 min), it is neglected in the chain with the assumption that 239U becomes immediately 239Np. Considered neptunium isotopes are 237Np, 238Np and 239Np. 240Np is produced only from (n,γ) ...