E-CodeGamma shielding and dose geometry — a TI-84 Plus CE program
SHIELD is a TI-BASIC program for the TI-84 Plus CE. Transmission, half- and tenth-value layers, thickness for a required reduction with and without buildup, and the point-source flux behind the shield.
What it asks for and what it shows
It asks for 5 values at its prompts. In the example below it shows TRANS, HVL CM, TVL CM, X F CM, X BLD, FLUX, FLUX+B.
Example run
One of its oracle test cases: “lead, 5 cm”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | 0.8 |
| Input 2 | 5 |
| Input 3 | 100 |
| Input 4 | 37000000000 |
| Input 5 | 1000 |
| The screen shows | |
TRANS= | 0.01831563889 |
HVL CM= | 0.8664339757 |
TVL CM= | 2.878231366 |
X F CM= | 8.634694099 |
X BLD= | 11.54176685 |
FLUX= | 5392.79526 |
FLUX+B= | 26963.9763 |
How it's checked
6 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 48 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Gamma shielding and dose geometry” (SHIELD).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
Related programs
- Gamma shielding with Taylor buildup
- Radioactive decay chain (Bateman)
- Four-factor formula and criticality
- Point reactor kinetics, step reactivity
- Neutron moderation: xi and collisions
All TI-84 Plus CE engineering programs · All TI-84 Plus CE programs