Mostafa Yuness Abdelfatah Mostafa

10 Questions 27 Answers 0 Followers

Questions related from Mostafa Yuness Abdelfatah Mostafa

What is the time needed for Ra-226 equilibrium with Bi-214 during constant emanation rate of Rn-222 from solid Ra source?

If I want to measure Ra activity of point source by gamma spectroscopy (186 kev) in the same time Bi (609 kev) how many time needed for equlibruim which all Ra, Rn and Bi become in equlibruim so...

14 February 2015 4,855 36 View

Anybody knows, what is the chemical composition AFA-RMP filter (Radio spectrometric method of analysis) ?

Designed for research and control aerodisperse contaminants (aerosols) in air or other gases, for the occasional periodic sampling. AFA filters are made of various modifications with respect to...

12 January 2015 3,605 1 View

What is the relationship between radon equilibrium saturation time in big chambers (50L) and small chambers (0.5L)?

Is the time the same? If I have Ra-226 source with constant Rn-222 emendation rate, this source placed in closed chamber (50 L) the activity of air Bq/m3 reach to saturation equilibrium after 600...

01 December 2014 7,069 13 View

What is the importance of repetition of activity size distribution of 222Rn progeny (AMD and GSD) measurments?

If the results of activity size distribution (AMD and GSD) depend on the ventilation rate, sampling location, and room size. why we make comparison in some papers? what is the value of measurment...

26 November 2014 7,524 1 View

How Radon leakage can be calculated in radon diffusion experiment ?

Leakage as I know is the ratio of activity lost through glue or rubber and so on>> = radon activity pass through material with out Bg/total Activity with out Bg? is this true?

17 November 2014 7,988 10 View

What is the deep difference between emanation and exhalation of radon?

I know that emanation from material such as rooks to the air space or pores between them and exhalation from this pores to air indoor or outdoor. But as example in Ra-226 source? Emanation? Why?

11 November 2014 9,111 8 View

What is the possible degree of uncertainty of measured radon the diffusion coefficient or the radon permeability ?

I found a lot of research papers in radon diffusion coefficient through polymer membranes like as example PVC but there is no one talking about uncertainty or degree of error in measurements?

03 November 2014 8,524 6 View

What is the best way to obtain radon primary standard source?

radon primary standard source is very important in the field of radon measurments to calibtate devises and instruments

27 October 2014 5,327 9 View

What is the important application of radon diffusion in irradiation polymer materials?

what is the important application of radon diffusion in irradiation polymer materials?

15 October 2014 2,524 3 View

What is the best glue material to isolate radon gas in a diffusion chamber?

We have small diffusion chambers from aluminum, inside this chamber a Ra-226 source is installed with a normal emanation coefficient. Do we need to isolate this box with a roof using a good...

13 October 2014 7,633 5 View