Question: What is the isotopic distribution of uranium in the sample? Sample spectrum Counting time: 24 hours Gross counts : 41247 Counts per region of interest (ROI) and peak channel identified in the following table Peak Label Peak channel Counts in this ROI 1530 12258 1599 4149 1737 23839 Sample Spectrum G 200 Counts per chancel Fig: Alpha spectrum for the 100ng electroplated, pure uranium sample. Counting time of 24 h