•A monoenergetic beam of 18 MeV X-rays used in therapy has an energy fluence rate of 90 mJ.m-2.s-1. If the beam has a cross-sectional area of 10 cm2
what is the photon fluence rate?
Dear Zainah Mubarak ,
conversion from energy to photon number is done by dividing the energy (here 90mJ) by the energy of the photon(s) (here 18MeV).
For the conversion of MeV to J you may use: 1eV ~ 1,6*10-19J. Please google for this conversion number.
Pay attention, that the remainig task is to convert 1/m2 into 1/(10cm2).
My result is 90mJ/(m2*s) ~ 31*106Ph/(10cm2*s) for 18MeV photons .
Please check*) that result and confirm it...(I may have got in trouble with the decimal powers...)
*) it is a good excercise to do the individual calculation of the numbers and the collection of the decimal powers by your own.
Best regards
G.M.
Zainah Mubarak Gerhard Martens Looks like a homework question to me...
Alan F Rawle
you are right;
thus I intended to let the detailed calculation be done by Zainah Mubarak
What have the school system done if there is a link Has there been any intervention in the school regarding aggression Being expose to aggression in the school and what have they done
19 September 2018 3,897 3 View
13 August 2018 806 1 View
in interpersonal metafunction of Systemic Functional Grammar of Hallidayan approach mood and modality are central to judge the attitude of speaker and narrator in proposition or proposal. I need...
12 February 2015 6,500 5 View
I would like to add some optimization functions in the AOMDV routing protocol, i want add the concept of cooperative packet caching, but to do that, i have to have the code for the implementation...
02 December 2014 7,745 6 View
Technology usage by teachers
24 January 2013 3,108 35 View
Hi, I am after the reference below, my library says it cannot obtain a copy either locally or internationally, any help appreciated! Chris Wang ZM, Heshka S, Wielopolski L, Pi-Sunyer FX, Pierson...
03 March 2021 6,193 1 View
i am try to classify the x-ray images. During classification , can i block unwanted images (except x-ray image).
03 March 2021 7,100 1 View
01 March 2021 1,290 2 View
Educational Process
01 March 2021 1,827 1 View
27 February 2021 2,753 4 View
I have tried every combination of parameter changes and after that i have a poor chi square value. I can't get it lower any further. I know there have been a lot of discussion about Rietveld...
26 February 2021 8,480 3 View
I am working on TiO2 composite material and the results of XRD have a lot of small/junk peaks and while I apply a smooth filter in Origin then the other characteristics peaks disappear so anyone...
26 February 2021 8,183 3 View
I had a crystal hit in a well with 0.1M HEPEs pH 7.5, 10%(w/v) PEG 4000, and 20%(w/v) isopropanol. Why is isopropanol in w/v here if it's just solvent? How do I recreate this well condition?
25 February 2021 9,761 1 View
i am trying to download x'pert high score software, but can't download it. please do suggest software for phase analysis
24 February 2021 5,687 4 View
Oil and gas companies run gamma ray tool and take readings in API units while Gamma ray is also noted in cps, so how these units can be converted into each other?
24 February 2021 7,545 2 View