تبلیغات
پرتوها،ایمنی و کاربرد آنها - حفاظ گذاری

اول ایمنی بعد کار

حفاظ گذاری

تاریخ:پنجشنبه 5 شهریور 1388-11:49 ق.ظ

حفاظ گذاری :

هدف از حفاظ گذاری كاهش پرتوگیری افرادی است كه در مجاورت چشمه پرتوزا و یا دستگاه پرتوساز فعالیت دارند در محاسبات حفاظ تعیین ضخامت وتركیب مواد بوجود آورنده حفاظ مورد نیاز جهت كاهش تندی پرتوها در نقاط معین به مقدار از پیش تعیین شده مطرح است.

لایه نیمه كننده (HVL) ضخامتی از هر ماده كه سطح انرژی تابیده شده را نصف می‌كند.

HVL تعدادی از مواد عبارت است از :

HVL          عنصر

0/95mm                Cs-137

1/2mm                  Co-60

0/6mm                  Ir-192

9/25                      H2o

میزان انرژی جذب شده را می‌توان از رابطه زیر بدست آورد.

(2-4)       

برای مثال اگر یك فوت آب برای حفاظ گذاری در مقابل پرتوهای نوترون با انرژی 60mev تعبیه شده باشد میزان انرژی جذب شده را محاسبه كنید.

شدت یك دسته پرتو رونتگن (x,γ) تك انرژی به طور نمای در عبور از یك مانع كاهش می‌یابد.

(2-5)        I=I0e-µx

در این رابطه µ ضریب كاهش خطی و xضخامت ماده می باشد.

 

 

 




داغ کن - کلوب دات کام
نظرات() 
cialisvv.com
دوشنبه 12 شهریور 1397 03:54 ب.ظ

Nicely put, With thanks.
cialis baratos compran uk cialis cuantos mg hay cialis 5 mg schweiz cialis en 24 hora comprar cialis navarr prix de cialis acquistare cialis internet trusted tabled cialis softabs sialis cialis usa cost
cialisbuys.com
یکشنبه 11 شهریور 1397 10:36 ب.ظ

Reliable data. Many thanks.
get cheap cialis brand cialis generic cialis prices warnings for cialis cialis dosage amounts cialis online cialis coupons prescription doctor cialis low cost cialis 20mg cialis 5mg billiger
http://viabiovit.com/comprar-viagra-internet.html
سه شنبه 23 مرداد 1397 09:54 ق.ظ

Amazing all kinds of valuable knowledge.
buying viagra ireland buying viagra without prescription viagra usa pharmacy where can i buy viagra without prescription buy viagra canadian pharmacy buy viagra brand online sildenafil without prescription uk cheapest viagra with prescription viagra price uk cheap online pharmacy no prescription
Buy cialis
سه شنبه 23 مرداد 1397 01:23 ق.ظ

Good facts. Thanks!
dosagem ideal cialis cialis sans ordonnance cialis generico in farmacia cialis baratos compran uk cialis generika in deutschland kaufen when will generic cialis be available buy generic cialis buying cialis overnight if a woman takes a mans cialis only here cialis pills
Kincaid
شنبه 6 مرداد 1397 09:04 ق.ظ
I'm really loving the theme/design of your blog.
Do you ever run into any web browser compatibility problems?
A few of my blog readers have complained about my blog not operating correctly in Explorer but looks great
in Firefox. Do you have any suggestions to help fix this issue?
Globalplus
جمعه 15 تیر 1397 06:47 ب.ظ
Juust want to ѕay ⲟur article is aѕ astonishing.
Τһe clearness in your post is simply cool and i
сould assume you are an expert on tһis subject.
Well with youг permission ɑllow me to grab your RSS feed to keеp
uⲣ to dɑte with forthcoming post. Thankѕ a milⅼion ɑnd pleaѕe keep up the enjoyable ᴡork.
Jana
دوشنبه 4 تیر 1397 02:27 ق.ظ
Hi theгe alⅼ, here every person is sharing ѕuch know-how, thuѕ it's pleasamt tⲟ rеad this blog, and I useԀ to goo tto ѕee this website everyday.
Cialis prices
دوشنبه 7 خرداد 1397 04:41 ب.ظ

Thanks a lot. I appreciate it.
cialis generico in farmacia tadalafilo 40 mg cialis what if i take tarif cialis france acheter cialis kamagra buy cialis sample pack look here cialis cheap canada cialis price thailand viagra vs cialis vs levitra cialis e hiv
eyelashes Growth
شنبه 29 اردیبهشت 1397 09:15 ب.ظ
hi!,I really like your writing so much! proportion we keep up a correspondence extra appoximately your
post on AOL? I require a specialist in this
area to solve my problem. May be that is you! Looking aheawd
to peewr you.
Leopoldo
یکشنبه 23 اردیبهشت 1397 04:58 ب.ظ
Great goods from you, man. I have understand your
stuff previous to and you are just extremely wonderful.
I really like what you've acquired here, really like what you
are stating and the wway in which you say it. Yoou make it enjoyable and you still care for to keep it wise.

I can't wait to read far more from you. This is actuallly a great site.
Viagra 20 mg
پنجشنبه 6 اردیبهشت 1397 05:34 ق.ظ

Nicely put. Regards.
buy cheap viagra online with prescription cheap sildenafil uk generic sildenafil citrate viagra pharmacy uk where buy viagra buy cheap viagra viagra online cheap buy viagra usa online where can u buy viagra where can you buy viagra uk
Frank
دوشنبه 3 اردیبهشت 1397 06:23 ب.ظ
We're a group of volunteers aand opening a neww scheme in our community.

Yourr web site offere us with valuaboe info to work on. You havge done a
formidable job annd our etire communiy will be grateful too
you.
Hussin Ahmed
جمعه 24 فروردین 1397 07:44 ب.ظ
Greetings! Very useful advice within this article!
It's the little changes hich will make the greatest changes.
Many thanks for sharing!
viagra super active india
پنجشنبه 23 فروردین 1397 12:24 ب.ظ
Thank you, Ӏ've reⅽently beеn searching for info аpproximately thiѕ subject
fօr a wһile and yours is tһe greateѕt I һave discovered ѕo far.
However, ԝһat cοncerning thе conclusion? Агe you positive concerning the supply?
Generic cialis
یکشنبه 19 فروردین 1397 04:44 ق.ظ

Nicely put. Regards.
achat cialis en europe safe dosage for cialis generic cialis pro low cost cialis 20mg cialis coupons printable cialis 5 mg para diabeticos cialis 5 effetti collaterali legalidad de comprar cialis cuanto cuesta cialis yaho cialis cuantos mg hay
mezo
سه شنبه 7 فروردین 1397 01:09 ق.ظ
Ꮩery nice post. I juѕt stumbled ᥙpon your blog aand wished to say that I'ѵe
truly enjoyed browsing your blog posts. In any cаѕe Ι'll bbe subscribing to уօur rss feed
and I hope you write agɑin very soon!
Buy generic cialis
جمعه 3 فروردین 1397 07:56 ق.ظ

Regards, Quite a lot of info.

buy cialis online cheapest cialis pas cher paris cialis 30 day trial coupon buy name brand cialis on line cialis purchasing cialis farmacias guadalajara cialis 20 mg best price cialis bula cialis tablets cialis billig
Marietta
جمعه 17 آذر 1396 08:35 ب.ظ
I will immediately seize your rss as I can not to find your email subscription hyperlink or e-newsletter service.
Do you've any? Please permit me know in order that I may just subscribe.
Thanks.
Foot Problems
دوشنبه 16 مرداد 1396 03:45 ق.ظ
Hi there would you mind letting me know which webhost you're
utilizing? I've loaded your blog in 3 different web browsers and I must say this blog loads a lot quicker then most.
Can you suggest a good web hosting provider
at a fair price? Thanks, I appreciate it!
heathibhfexavwt.jimdo.com
جمعه 6 مرداد 1396 07:22 ب.ظ
Good respond in return of this difficulty with genuine arguments and explaining everything about that.
BHW
چهارشنبه 23 فروردین 1396 10:56 ب.ظ
Wonderful goods from you, man. I have understand your stuff previous to and you are just extremely great.
I actually like what you have acquired here, certainly like what you are stating and the way in which you say
it. You make it entertaining and you still care for to keep
it sensible. I cant wait to read far more from you.

This is actually a tremendous site.
BHW
جمعه 18 فروردین 1396 04:26 ب.ظ
Informative article, exactly what I wanted to find.
manicure
یکشنبه 13 فروردین 1396 09:24 ق.ظ
Hey are using Wordpress for your site platform? I'm new to the blog world but I'm
trying to get started and create my own. Do you require any html coding knowledge to make your own blog?
Any help would be really appreciated!
 
لبخندناراحتچشمک
نیشخندبغلسوال
قلبخجالتزبان
ماچتعجبعصبانی
عینکشیطانگریه
خندهقهقههخداحافظ
سبزقهرهورا
دستگلتفکر




Admin Logo
themebox Logo