Geometry Design of an Electron Dump with Simple Geo

The goal of this study is to design a geometry of an electron dump with Simple Geo code which is a freeware product and provides the ability of designing complex geometric systems easily. Also, Simple Geo can output the designed geometry in many different formats. Desired design of the electron dump is to stop the 40 - 42 MeV electron beams. To reach this aim, requested geometric design with the possible material was done with Simple Geo and a FLUKA output format file created to run the simulations in FLUKA code

Gamma-Ray Attenuation Properties of Boron Carbide in Radiological Energy Range Using MCNPX Code

The radiation attenuation parameters such as radiation mass attenuation coefficients (MAC), half value layer (HVL), mean free path (mfp) of boron carbide (B4C) have been calculated at radiological x-ray energies using MCNPX (version 2.6.0) general purpose Monte Carlo code. The results obtained from MCNPX have been compared with standard XCOM data. Moreover, the obtained mass attenuation coefficient results have been compared with ordinary concrete. Furthermore, standard deviation rates between MCNPX and XCOM were also calculated by statistical methods and a good agreement was obtained. The results showed that, present investigation can be useful for evaluation of shielding features of B4C. It can be concluded that modeled standard geometry for present investigation can be used for shielding assessment of B4C at radiological energy range

Radon concentrations and gamma radiation activity measurements of Muğla, Turkey

© 2019, Editura Academiei Romane. All rights reserved.In the present study, the indoor radon activity concentrations in air were measured by using the LR-115 solid state nuclear track detectors in 25 dwellings (chosen as 9 old and 16 new) in Muğla, Turkey. The indoor radon activity concentration values for old dwellings vary from 160.37 to 367.54 Bq/m3 and for new dwellings from 79.83 to 347.41 Bq/m3. Moreover, the gamma-ray activity measurements of 238U, 232Th, 40K and 137Cs has been measured by using a HPGe detector for sand and sediment samples which were collected from Muğla. The activity concentration values for 238U, 232Th, 40K, and 137Cs vary from 5.6 to 72.6 Bq/kg, 2.26 to 38.03 Bq/kg, 79.54 to 867.48 Bq/kg and 0 to 1.42 Bq/kg, respectively. Most of the activity and effective dose values were within the limits of United Nations Scientific Committee on the Effects of Atomic Radiations (UNSCEAR) reports. In addition, a comparison between Muğla and other cities specified in the literature was also given

Determination of Indoor Radon Concentrations at the Elementary Schools of Fatih District in Istanbul

Radon is an odorless, tasteless, colorless noble radioactive gas which is produced within the radioactive decay chain of Uranium. The Radon forms in rocks, diffuses into soil and then escapes into atmosphere. When human exposure to high concentration of radon gas from inside, risk of developing lung cancer is increased. There are many methods to determine Rn-222 concentration in the air. In this study, radon concentration of confined air spaces were measured by using LR-115 solid state nuclear track detectors. 509 LR-115 nuclear trace detectors were placed to 25 schools in Fatih District and they effective dose values were calculated. The results of measurements showed that the radon concentration varies between 40-395 Bq/m(3). This results compared with Turkey's limits (400 Bq/m(3)) are low, conversely higher compared with WHO's limits (100 Bq/m(3))

Studies at the border between nuclear and atomic physics: Weak decays of highly charged ions

Present status of experimental studies of weak decays of highly charged ions is presented. The paper closely follows the progress-report presentation given at the conference. Due to the limited space an emphasis is given to an exhaustive bibliography