The decay scheme was studied using a beta spectrometer in addition to gamma-gamma and gamma-beta coincidence scintillation counting techniques. A single beta group with an end point energy of 387卤1 keV (log ft = 5.7) populates a 1042-keV level in Cm 244. This 1042-keV level decays to ...
Measurements of delayed neutron decay constants and fission yields from {sup 235}U, {sup 237}Np, {sup 241}Am, and {sup 243}Am Isotopes of the higher actinide elements are produced as a result of successive radiative capture reactions in the uranium fuel of nuclear reactors. Typica... HH ...
Electron capture decay of 238Am and electric monopole transitions in 238Pu Mass-separated samples of 238 Am(T 1 2 = 98 min) have been used to investigate the EC decay scheme of 238Am. The γ-ray and conversion electron spectra wer......
Brayard A, Escarguel G (2013) Untangling phylogenetic, geometric and ornamental imprints on Early Triassic ammonoid biogeography: a similarity-distance decay study. Lethaia 46:19–33 Article Google Scholar Brayard A, Escarguel G, Bucher H (2007) The biogeography of Early Triassic ammonoid fau...
Scheme of the chemical separation About this article Cite this article Gückel, K., Shinonaga, T., Christl, M.et al.Scavenged239Pu,240Pu, and241Am from snowfalls in the atmosphere settling on Mt. Zugspitze in 2014, 2015 and 2016.Sci Rep7, 11848 (2017). https://doi.org/10.1038/s415...
241 Am from the beta decay of 241 Pu, which is itself formed via successive neutron captures in 239 Pu and 240 Pu. Even in significantly contaminated environments, Pu and Amisotopes often only exist in lowmass concentrations and thus, synchrotron radiation techniques, which provide useful ins...
图1 240Am简化衰变纲图Fig.1 Simplified decay scheme of 240Am 用Geant4模拟计算了240Am放射性溶液置于阱型HPGe探测器中测量的能谱以及在该放射性溶液与探测器之间加1 mm厚Pb吸收体的测量能谱(图2)。由图2可见,1 mm厚Pb吸收体对 240Am的低能γ、X射线基本吸收殆尽,高能段的级联峰显著减少,888.8 keV和987....
The α-decay of Am 241 is studied with a magnetic double-focussing α-spectrograph. Analysis of the spectrum revealed more than 18 fine-structure groups of the α-radiation of the above isotope most of which are found for the first time. The scheme of the energy levels of the Np 237 ...
Charts of the 238U, 235U, 232Th and 241Am decay series with principal modes of decay, their intensities and energies. Radioactivity in the Environment, v. 13, p. 417-423, 2008.W. Geibert. "Charts of the 238U, 235U, 232Th and 241Am decay series with principal modes of decay, their ...
The radiation from the alpha decay of Am 241 has been investigated by studying the fine structure of the alpha spectrum and by performing alpha-gamma and gamma-gamma coincidence measurements. For the daughter nucleus Np 237 a level scheme is proposed which comprises 21 excited states and 39 ...