Study the effect of doping V2O5 on polymers poly vinyl alcohol ( PVA), poly vinyl pyrrolidone (PVP) on the optical and structural properties for film prepared by using Casting method at thickness( 300±20)nm ,All the materials dissolved in distilled water by magnetic mixer for one hour .The optical parameters measured by using UV-VIS spectrometer ,and the structural parameters measured by X-ray diffraction .when measured the energy gap found that the value was decreases from 4.6 eV to 2.98 eV with doping .The refractive index ,extinction coefficient ,absorption coefficient ,real and imaginary dielectric constants of (PVA/PVP) are increasing with doping by V2O5 and with increase the ratio of dop

PVA --- PVP --- doping --- structural and optical properties --- V2O5

In this work radon concentration in 37 soil samples collectedfrom 17 regions surround the (Al Tuwaitha) were measured by usingsolid-state nuclear track detector (SSNTD.s) CR-39 with naturalexposure of one month, and by comparison with standard samples. Theradon concentration in the soil samples was about (9.583 ± 0.369 ـــ28.029 ± 0.631) Bq/m3 in locations one (Rotate Salman) and eight (Anarea agricultural near high-voltage towers) respectively, with rate of(20.939 ± 0.541) Bq/m3. The specific activity of radium (Ra) dissolvedduring generate radon were ranging between (3.37 – 9.857) Bq.kg-1,with rate of (7.393) Bq.kg-1, surface emission of radon gas rate in thesoil was found between (0.144 – 0.422 Bq/m2.h) with rate of (0.314Bq/m2.h) and their mass emission of radon gas rate has the highestvalue of (0.016 Bq / kg . h) and lower value (0.005 Bq / kg . h) withrate of (0.012 Bq / kg . h. These results are within the acceptable limitthat recorded by UNECEAR and ICRP

Radon gas --- soil --- CR-39 detector --- Area Exhalation Rate --- Mass Exhalation Rate --- Radium concentration.