نتایج جستجو برای: 252cf
تعداد نتایج: 176 فیلتر نتایج به سال:
Coincidence and time-of-flight measurement techniques are employed to tag fission neutrons emitted from a 252Cf source sealed on one side with a very thin layer of Au. The source is positioned within a gaseous 4He scintillator detector. Together with α particles, both light and heavy fission fragments pass through the thin layer of Au and are detected. The fragments enable the corresponding fis...
Neutron individual dosimetry is challenging subject in dosimetry field. Thermoluminescent dosimeter (TLD) is one of the types of personal dosimeters that is extremely used to determine the doses of neutron sources. Typically, this type of dosimeter is used in different centers with a variety of applications after calibration with a standard neutron radiation sources. Usually, materials of TL cr...
چکیده ندارد.
A new fission chamber was developed and built for prompt-fission-neutron spectra (PFNS) measurements in neutron-induced of actinides, is described Taieb et al. (2016). It allowed us to minimize incident- outgoing-neutron scattering, optimize both time resolution alpha fragment discrimination. The validated used 238U 252Cf PFNS measurements. In order measure samples with a natural activity the 1...
Fibroblasts were established in vitro from skin biopsies obtained from 55 women and 1 man with or without breast cancer and with or without exposure to radiation from the atomic bomb explosion in Hiroshima. The radiosensitivity of these cells was evaluated by clonogenic assays after exposure to X-rays or to fission neutrons from a 252Cf source. Data were fitted to a multitarget model, S/S0 = A ...
The changes of binding and fluorescent parameters of 1-anilino-8-naphthalene sulphonate (ANS) bound to lymphocyte membrane after irradiation in vitro were investigated. No significant dose dependence was found for either fluorescence or its polarization within the dose range of 0.1 to 0.7 Gy from a gamma-neutron field 252Cf source. Marked changes were however found for parameters of ANS binding...
The atomic structure of californium is probed by two-step resonance ionization spectroscopy. Using samples with a total amount about 2×1010 Cf atoms (ca. 8.3 pg), ground-state transitions as well to high-lying Rydberg states and auto-ionizing above the potential are investigated lifetimes various levels measured. These investigations lead identification efficient schemes, important for trace an...
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