Table 1.
Overview of the three 167Tm collections performed at MEDICIS.
| Separated 167Tm | Collected 167Tm | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| No. | 167Tm contenta | Foil | Activity per foilb | Total run activityc | Dec.-corr.d (%) | Activity per foilb | Total run activityc | Dec.-corr.d (%) | Ion loade |
| (MBq) | (MBq) | (MBq) | (MBq) | (MBq) | (nAh) | ||||
| 1 | 83.0 (80) | 1A | 33.6 | 33.8 → 41% | 51 | 8.7 | 8.9(15) → 11(2)% | 13 | 938 |
| 1B | 0.2 | 0.2 | 1 | ||||||
| 2 | 76.9 (73) | 2A | 14.6 | 34.4 → 45% | 55 | 7.5 | 15.4(19) → 20(3)% | 24 | 208 |
| 2B | 20.2 | 7.7 | 919 | ||||||
| 2C | 0.5 | 0.7 | 5 | ||||||
| 3 | 122.9 (118) | 3A | 28.8 | 33.1 → 27% | 32 | 15.4 | 19.2(25) → 16(3)% | 19 | 496 |
| 3B | 2.9 | 2.9 | 45 | ||||||
| 3C | 4.0 | 2.4 | 504 | ||||||
The mass 167 ion beam of three proton-irradiated erbium oxide pellets was implanted into two or three foils each per run. The activity on the foils was determined by in-situ gamma-spectroscopy in the collection chamber (“Separated 167Tm”) and dedicated gamma-ray spectroscopy measurements on the foils after retrieval (“Collected 167Tm”). Respective efficiencies and uncertainties where applicable are given and discussed in the text.
At start of collection run.
At end of individual foil implantation.
Sum of foil activities at end of implantation of the last foil (end of run). Efficiency given as ratio to sample activity at start of run.
Separation efficiency corrected for radioactive decay.
Cumulated ion beam intake.
The reason for bold typesetting is to mark these numbers as main result.