antihydrogen
antihydrogen
1. Once an antiproton and positron have joined forces, the resulting antihydrogen atom is electrically neutral and thus no longer caged by the electrical fields in the trap.
一旦一个反质子和正电子具有了结合的力量,产生的反氢原子是中性的，结果在线圈中不再受电场束缚。
2. A chain of reactions, starting with a beam of laser-excited cesium atoms, transfers the positrons to the antiprotons to form antihydrogen.
一连串反应开始于以雷射光激发铯原子束，然后使正子移到反质子旁以形成反氢。
3. In an effort to create lower-temperature antiatoms, the ATRAP collaboration has developed a laser-controlled system for antihydrogen production.
为了产生低温的反原子，ATRAP团队发展出以雷射控制的系统来制造反氢。
4. An atom of antihydrogen, for instance, is composed of a negatively-charged antiproton being orbited by a positively-charged positron.
举例来说，一个反氢原子，由带正电荷的正电子围绕带负电荷轨道运行的反质子组成。
5. Both researchers agree that producing antihydrogen atoms that are suitable for spectroscopy is the central challenge facing the groups now.
他们两人都同意，目前研究团队最主要的挑战，是制造出适合用来测量光谱的反氢原子。
6. They say that in the spring, they hope to train a laser on the antihydrogen to make a preliminary measurement of the atom's spectrum so that it can be compared to regular hydrogen.
他们在春天说,他们希望产生一束反氢激光制造出原子光谱的初步测量器以便它能与常态的氢相比较。
7. For example, any violation of the expected symmetry between hydrogen and antihydrogen would rock physics to its core.
例如,任何违反氢和反氢之间对称的期望会动摇物理学的核心。
8. Having made antihydrogen atoms, investigators face two problems: First, how do you detect the atoms, to prove that they are really there?
制造出反氢原子之后，研究者会面临两个问题：第一，怎麽侦测这些原子，证明它们真的在那儿？
9. Violation of CPT symmetry by antihydrogen would be the granddaddy of broken symmetries and would have major consequences for physicists' conceptions of reality.
反氢原子如果违反CPT对称，将会是破坏对称性的始祖，物理学家对真实世界的认识会因此而受到重大影响。
10. Antihydrogen and hydrogen atoms should have the same properties, emitting the exact same frequencies of light, for example.
反氢和氢原子应该有相同的特性,例如发出光的频率一模一样。
11. Lone antiprotons can thus mimic the antihydrogen signal.
因此，单一的反质子也会产生类似反氢的讯号。
12. Two international collaborations (ATRAP and ATHENA) used these devices to produce thousands of slowly moving antihydrogen atoms in 2002.
在2002年二个国际小组合作(ATRAP和ATHENA)用这些装置生产数以千计慢慢移动的反氢原子。
13. In other work, ATHENA members have examined properties of the antihydrogen production process.
在另一项工作里，ATHENA的成员检查了反氢制造过程的特性。
14. Given enough trapped antiatoms, scientists hope to see if antihydrogen emits and absorbs light at exactly the same frequencies as hydrogen does.
如果收集到足够的反原子，科学家希望能看看，反氢原子所放出或吸收的光，频率是否与氢原子一样。
15. Such a configuration may be very useful for future experiments involving magnetic traps (which will be needed to hold the antihydrogen atoms).
对于未来以磁阱（用来抓住反氢）做的实验，这种排列方式可能会很有用。
16. They then observed the flashes of energy when the new antihydrogen atoms annihilated themselves in collisions with ordinary matter in the walls of the chamber.
当新的反氢原子在房间墙壁中和平常物质碰撞湮灭它们自己的时候,然后他们观察到了能量的闪光。
17. If the same precision could be achieved with antihydrogen, a comparison of the two spectra would take physics well beyond the present CPT frontier for stable particles.
我们已经有非常精确的氢原子光谱，如果也可以有相同精确度的反氢原子光谱，那麽比较这两者的光谱，可使稳定粒子现有的CPT界限大幅扩张。
18. 7.If the same precision could be achieved with antihydrogen, a comparison of the two spectra would take physics well beyond the present CPT frontier for stable particles.
我们已经有非常精确的氢原子光谱，如果也可以有相同精确度的反氢原子光谱，那麽比较这两者的光谱，可使稳定粒子现有的CPT界限大幅扩张。收藏指正
19. antihydrogen steel
抗氢钢
20. It is the goal of these collaborations to probe the energy level structure of antihydrogen to compare it with that of hydrogen as a test of the CPT theorem.
探测反氢的能级结构把它与氢作比较如同一项CPT定理测试那样是这些合作的目标。
21. Laser-assisted Antihydrogen Formation between a Positronium and an Antiproton
激光辅助的电子偶素对反质子的反氢生成反应
22. While antihydrogen atoms have been glimpsed in CERN experiments before, this is the first time they are being produced under circumstances that might eventually permit their detailed study, the scientists say.
科学家说，虽然反氢原子以前在CERN实验中被看见过,这是他们第一次在最终被允许他们详细研究情况下产生的现象。
23. In 1995, the CERN laboratory in Geneva first produced antihydrogen in the LEAR by shooting antiprotons, which were produced in a particle accelerator, at xenon clusters.
自然界的环境不会出现反氢，因此需靠人们以粒子加速器来制造。
24. To make cold antihydrogen, the experimenters must slow down the antiprotons to a temperature similar to that of the positrons.
要制作冷的反氢，实验者必须将反质子减缓到与正子相近的温度。
25. The count when the positrons are present is thus the count of neutral antihydrogen atoms that happened to be weakly bound and traveling in the right direction.
阱里有正子时，计算所得的数量就表示，有多少个束缚松散的反氢原子沿著轴飞行。
26. The Athena experimenters say they still know very little about their antihydrogen atoms.
雅典娜实验者说他们仍然对他们的反氢原子知之甚少。
27. The Athena team recorded this pattern 131 times and based on simulations, concluded that it had produced at least 50,000 antihydrogen atoms.
雅典娜小组基于模拟记录这个状态131次,推断它已经至少产生50,000个反氢原子。
