| 单词 | ultracold neutron |
| 释义 | ultracold neutron [¦ǝl·trǝ¦kōld `nü´trän] PHYSICS A neutron whose energy is of the order of 10-7 electronvolt or less, so that it is totally reflected from various materials and suitably constructed magnetic fields, regardless of the angle of incidence, and can be stored in suitably constructed bottles. |
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