نتایج جستجو برای: radioactive decay period
تعداد نتایج: 580142 فیلتر نتایج به سال:
All building materials contain various amounts of natural radioactive nuclides. Materials derived from rock and soil contain mainly natural radionuclides of the uranium (238U) and thorium (232Th) series, and the radioactive isotope of potassium (40K). Radiation exposure due to building materials can be divided into external and internal exposure. The external exposure is caused by direct gamma ...
Cadmium tungstate crystal scintillators enriched in 116Cd to 82% (CdWO4, total mass of ≈1.2 kg) are used to search for 2β decay of 116Cd deep underground at the Gran Sasso National Laboratory of the INFN (Italy). The radioactive contamination of the CdWO4 crystals has been studied carefully to reconstruct the background of the detector. The measured half-life of 116Cd relatively to 2ν2β decay i...
As a result of the 2011 nuclear incident that occurred at the Fukushima Nuclear Power Plant, a large number of abandoned dogs and cats were left within the disaster zone. A small number of these animals were rescued and cared for at shelters. Prior to the dispersal of these animals to their owners or fosterers, we evaluated the degree of internal radiocesium contamination using a specially desi...
تغییرات غلظت گاز رادون درون آبهای زیرزمینی، یکی از پیش نشانگرهای شناخته شده زلزله می باشد. در گذشته روش های متعددی جهت اندازه گیری غلظت رادون درون آب ارائه شده است. در این پایان نامه با استفاده از کد mcnpx امکان اندازه گیری مستقیم تغییرات گاز رادون درون آب با استفاده از آشکارساز گایگر مولر مورد بررسی قرار گرفته است. برای این منظور یک آشکارساز گایگر مولر قرار گرفته در استوانه ای تفلونی که در آب ...
Up to now, eighteen Target Ion Source Systems (TISSs) have been built and used for the production of radioactive ion beams on SPIRAL 1 facility, based on the IsotopeSeparator-On-Line (ISOL) method. The TISSs are composed of thick carbon targets and of fully permanentmagnet Electron Cyclotron Resonance Ion Sources (ECRISs) of the Nanogan III type. After irradiation and a decay period of two year...
The ?-decay scheme of Te138 and the level structure I138 is reported for first time. experiment was performed at Radioactive Isotope Beam Factory RIKEN, as one EUROBALL-RIKEN Cluster Array campaigns. Secondary radioactive ions, including Sb138, were produced by in-flight fission a U238 beam with energy 345 MeV per nucleon. From ? decay Te138, supplemented new spin parity assignments, such low-l...
groundwaters hydrochemistry of ayrakan and cheshmeh shotori areas and geochemistry of rare earth elements, indicate ayrakan alkali granite as the origin of uranium and other dissolved elements in groundwaters of these areas. geochemical and hydrogeochemical studies as well as the trend of uranium and thorium transition and mobility in aqueous environments of these areas indicate uranium adsorpt...
Mutiple experimental results indicate the existence of cosmophysical effects which influence parameters nuclear decays and chemical reactions in lab. conditions. In particular, variations nucleus alpha-,beta-decay with amplitudes order $10^{-3}$ periods one year solar day were detected. Significant activity on decay reaction also was reported. We argue that such deviations from radioactive law ...
background: in this study are submitted the radon concentration measurement results of four underground mines: stanterg, artana, hajvali and badovc, which are owned by trepça enterprise, kosovo. the mines have the same geological formation and from these mines are extracted ores rich with lead, zinc, silver, and gold. the radiation exposures caused by radon and radon daughters was determined an...
The β-decay scheme of Te138 and the level structure I138 is reported for first time. experiment was performed at Radioactive Isotope Beam Factory RIKEN, as one EUROBALL-RIKEN Cluster Array campaigns. Secondary radioactive ions, including Sb138, were produced by in-flight fission a U238 beam with energy 345 MeV per nucleon. From β decay Te138, supplemented new spin parity assignments, such low-l...
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