Helium-3 (3He)
氦-3气体是普通氦气的一种较轻的，无放射性的同位素，天然丰度是1.38×10-6。它无色，无臭，无味，主要以气态的形式用于中子探测器，核磁共振示踪，光谱学，低温物理，激光，制冷，以及核聚变研究等。
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| PRODUCT DETAILS/PURITY SPECIFICATIONS | |
| Parameters | Reference Specifications |
| Helium-3, atomic fraction (%) | ≥99.8 |
| Helium-4, atomic fraction (%) | ≤0.2 |
| Total Helium (He-3 and He-4), volume fraction (%) | ≥99.995 |
| Nitrogen, volume fraction (%) | ≤6 x 10-4 |
| Hydrocarbons, volume fraction (%) | ≤6 x 10-4 |
| Hydrogen, volume fraction (%) | ≤6 x 10-4 |
| Oxygen and Argon in total, volume fraction (%) | ≤6 x 10-4 |
| Carbon Monoxide, volume fraction (%) | ≤6 x 10-4 |
| Volumetric activity of Tritium, Bq/L (Ci/L) | ≤4.8(1.3 x 10-10) |
| Tritium, atomic fraction (%) | ≤1 x 10-11 |
| Carbon Dioxide, volume fraction (%) | Not specified |
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