Keywords : X-Ray


Study of the Effect on the Structural Properties of Polyvinyl Alcohol (PVA) Thin Films Doped with Aqueous Zinc Acetate after Exposing them to X-Rays and then to a CO2 Laser Beam and Vice Versa.

Abeer Kadhim; Khalil Ibrahim Mohammed

Kirkuk University Journal-Scientific Studies, 2022, Volume 17, Issue 3, Pages 39-44
DOI: 10.32894/kujss.2022.131389.1045

the study of the structural properties of the prepared films The to study the effect of each of the irradiation with a CO2 And a beam of X-rays, as well as the effect of the doping process on the thin films of a (PVA) doped with aqueous zinc acetate. By 5%, the casting method was used to make it into a thin film It is deposited on 25.4 * 12.5 nm, and its thickness is approximately 380.42 nm. Then the samples were divided into two parts, the first exposed to a CO2 laser beam at a constant energy of 10 Watt and (3,6,9,12 sec), then it was exposed to X-rays for 1.5 h. And fixing the voltage of the X-ray f (5KV). The second section of the samples were exposed to X-rays for different periods of time (0.5, 1, 1.5, 2, 2.5 h) with a voltage of (5 KV). Then, t exposed to a (CO2) laser with a energy of 10 Watt and a fixed exposure time of 10 sec. The effect of irradiation in both cases studied on the optical and structural properties. The results of (XRD) that the mixture (PVA + Zn) showed that the crystalline nature is amorphous. For the purpose of studying the topography of the surfaces, the results of (AFM) showed a decrease in the particle size after irradiation of the mixture, and it was found that the effect of irradiation is more responsive in the case of (Laser + X-Ray)than of (X-Ray + laser).

Effect of the X-Ray on the Etch Rate Velocities (VB and VD) of the Nuclear Track Detector CR-39

Diman Nawzad Jabar; Ahmed A. Ibrahim; Khalil Ibrahim Mohammed

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 3, Pages 101-115
DOI: 10.32894/kujss.2020.15.3.5

The paper aims to study the effect X-Ray on different parameters of the nuclear track detector CR-39 irradiated with alpha particle. The parameters are tracks diameter, the Bulk etch rate, Track diameter growth rate. The detectors were exposed to X-Ray of voltage 5 kV and current 0.01 mA for different periods of time (0.5-2.5) h with step 0.5 h before and after irradiation with alpha particles of energy 2.5MeV emitted from 241Am source. It was found that the detector response in the case of irradiation with (X-ray+Alpha) is greater than that in the case (Alpha+X-ray) as compared to the slandered one irradiated with alpha particles only. It was also found that the track diameters and the bulk etch rate increase with the progress of the exposure time to X-ray for both cases, before and after irradiation with alpha particles.