Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
![Absorbance spectra of Roselle dosimeter at different doses (left) and absorbance spectra from Handayani and Imawan [9] (right).](https://sciendo-parsed.s3.eu-central-1.amazonaws.com/667ab072dd1c3d1f8713e9a5/j_nuka-2024-0010_fig_004.jpg?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Content-Sha256=UNSIGNED-PAYLOAD&X-Amz-Credential=AKIA6AP2G7AKOUXAVR44%2F20251207%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20251207T055739Z&X-Amz-Expires=3600&X-Amz-Signature=acea7b59105d303299ba4c5618df7bdaa1d72630fc464f3b9ae57b79370e409e&X-Amz-SignedHeaders=host&x-amz-checksum-mode=ENABLED&x-id=GetObject)
Fig. 5.
Fig. 6.
Relative change in peak absorbance of Roselle dosimeter solution at set time intervals_ Negative values indicate a decrease in peak absorbance
| Dose (kGy) | Peak absorbance | Relative change in peak absorbance (%) | |||||
|---|---|---|---|---|---|---|---|
| 10 min | 20 min | 30 min | 40 min | 1 h | 96 h | ||
| 0 | 3.74 | 0.6 | 3.9 | 4.1 | –0.3 | –1.1 | –68.8 |
| 0.3 | 2.93 | –0.5 | –1.5 | –2.2 | –2.9 | –8.3 | –53.9 |
| 0.9 | 2.61 | –1.3 | –2.2 | –3.1 | –9.5 | –9.5 | –55.6 |
| 1.8 | 1.20 | –0.7 | –0.7 | –1.5 | –1.9 | –12.1 | –59.1 |
| 3.8 | 1.05 | 0.9 | 2.4 | 4.3 | 5.5 | 5.3 | –3.2 |
| 7.5 | 0.51 | 5.0 | 10.6 | 15.9 | 21.0 | 42.1 | 21.4 |