单词查询
positrons
美['pɑzətrɑn]，英['pɒzɪtrɒn]，
释义
「
」
n. 【物】正子； 网络释义： 正电子；阳电子；
例句
But the lightning flash detected by Fermi appeared to have produced about 100 trillion positrons: "That's a lot, " he said.
不过，费尔米发现的闪电似乎产生了一百万亿正电子，“那可是个天文数字，”他说。
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。
It needed some years of development by the experimenters before the fact of the existence of positrons was established.
确立存在正电子这个事实还需要几年的实验发展。
If the material being tested has no defects in it, the positrons react a little differently.
如果所探测的材料不存在缺陷，正电子则表现得稍有不同。
In the case of a material with a defect, the positrons are trapped at nano-sized defects in the material.
如果材料有缺陷，这些正电子可以捕捉到纳米尺寸的材料缺陷。
Meanwhile, positrons from the decay of a form of radioactive sodium are separately slowed and accumulated.
同时，来自放射性钠一种形式的衰减正电子被慢慢分开且累积起来。
Some antiproton annihilations produce a shower of positrons, which in turn produce 511-keV gamma rays, two of which may be detected.
有些反质子的消灭会放出大量正子，进而产生能量为511keV的γ射线，两者都可以侦测到。
The antiprotons are then pushed into the same trap as the positrons and left to mingle for a second or so.
然后将反质子推入到装有正电子的容器中，用大约一秒钟的时间等待它们混合。
For the positrons, one can think of the end potential as a ramp and the particle as a ball rolling up the ramp.
对正子来说，两端的位能就像是斜坡，粒子就如同滚上斜坡的球。
These positrons then come into contact with electrons in the body, and the two annihilate, releasing two gamma-ray photons.
正电子与人体组织中的电子发生作用而湮灭，产生两个伽玛射线光子。
不过，费尔米发现的闪电似乎产生了一百万亿正电子，“那可是个天文数字，”他说。
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。
It needed some years of development by the experimenters before the fact of the existence of positrons was established.
确立存在正电子这个事实还需要几年的实验发展。
If the material being tested has no defects in it, the positrons react a little differently.
如果所探测的材料不存在缺陷，正电子则表现得稍有不同。
In the case of a material with a defect, the positrons are trapped at nano-sized defects in the material.
如果材料有缺陷，这些正电子可以捕捉到纳米尺寸的材料缺陷。
Meanwhile, positrons from the decay of a form of radioactive sodium are separately slowed and accumulated.
同时，来自放射性钠一种形式的衰减正电子被慢慢分开且累积起来。
Some antiproton annihilations produce a shower of positrons, which in turn produce 511-keV gamma rays, two of which may be detected.
有些反质子的消灭会放出大量正子，进而产生能量为511keV的γ射线，两者都可以侦测到。
The antiprotons are then pushed into the same trap as the positrons and left to mingle for a second or so.
然后将反质子推入到装有正电子的容器中，用大约一秒钟的时间等待它们混合。
For the positrons, one can think of the end potential as a ramp and the particle as a ball rolling up the ramp.
对正子来说，两端的位能就像是斜坡，粒子就如同滚上斜坡的球。
These positrons then come into contact with electrons in the body, and the two annihilate, releasing two gamma-ray photons.
正电子与人体组织中的电子发生作用而湮灭，产生两个伽玛射线光子。