(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A aluminum container has walls that are 23 mm thick. A radiation detector measures a rate of 542 Hz outside the container. The radiation source inside the container has a half-life of 2.4 years. What is the rate of radiation from the source inside the container?

2. Relevant equations

x_{1/2}=ln2/u

u= 0.014 mm^{-1}

x_{1/2}=48.26 mm

3. The attempt at a solution

I tried to solve this problem using proportions, and it didn't work. Is there another way?

23 mm is 47% of aluminums half-length (48.36 mm). so the amount of radiation change from inside to outside should be 50% of 47% of aluminums half-lenght.

so 542*23.5% = 127.3

542+127.3 = 669.3 Hz

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Rate of radiation coming from inside a container

**Physics Forums | Science Articles, Homework Help, Discussion**