Measurement of 238 U, 232 Th, 222 Rn and 220 Rn Contents in Optical Contact Lenses: Resulting Alpha and Beta Equivalent Doses to the Eye Tissues of Adult Patients.

To estimate equivalent doses received by eye tissues of patients, contents of uranium ( 238 U), thorium ( 232 Th), radon ( 222 Rn), and thoron ( 220 Rn) were determined inside various optical contact lenses used for vision correction. 238 U, 232 Th, 222 Rn, and 220 Rn contents varied between (3.44 ± 0.

Study of the transfer of U, Th and Rn radionuclides from soil to cereal plants and root vegetables in a semi-arid area: Resulting radiation doses to rural consumers.

Cereals and vegetables, widely consumed by Moroccan rural populations, are locally produced without using fertilizers. To explore the exposure pathway of U, Th, and Rn to the human body, we measured the contents of these radionuclides in various compartments of cereal plants and root vegetables. Contents of these radionuclides were also measured in the soils in which the cereal plants and root vegetables were grown in a semi-arid area.

Assessment of Alpha Doses Received by Spa Workers Due to the Inhalation of 214 Po and 218 Po Radon Progeny.

In Morocco spas are more and more frequented by bathers for massages, body treatments, and aromatherapy and hair services, among others. Alpha-activities due to 222 Rn, 220 Rn and their progeny have been evaluated inside spa room atmospheres by means of a technique based on using two types of solid-state nuclear track detectors. 222 Rn and 220 Rn concentrations ranged between (67 ± 5 and 103 ± 7) Bq m -3 and (5.

Study of Alpha and Beta Radioactivity of Clay Originating from Radionuclides Belonging to the 238U and 232Th Families: Doses to the Skin of Potters.

Pottery objects are presently more and more used for decoration in homes and hotels. To assess radiological hazards to potters, 238U, 232Th, 222Rn, and 220Rn radionuclides were analyzed in different clay body samples used for pottery production by means of CR-39 and LR-115 II track detectors. Data obtained were compared to those gotten by means of isotope dilution mass spectrometry.

Dose to Medical Personnel.

Radioiodine I is successfully used in nuclear medicine for the treatment of hyperthyroidism and thyroid cancer. This radionuclide emits β particles used for the treatment and gamma photons used for diagnosis. The aim of this study is to determine gamma radiation doses received by medical personnel situated at a distance of 1 m from patients having ingested I for the treatment of hyperthyroidism diseases.