antiparticle

简明释义

英[ˈæntipɑːtɪkl]美[ˈæntipɑːrtɪkl]

n. [高能] 反粒子

英英释义

单词用法

同义词

反义词

例句

1.For each particle there should be a corresponding antiparticle with exactly the same mass and lifetime but with an opposite electrical charge.

每个粒子都应该对应着一个反粒子，它们的质量和寿命完全相同，但带有相反的电荷。

2.A horizontal bar over a particle symbol is used to designate the antiparticle.

粒子符号上加一横，用来表示反粒子。

3.The symbol used to denote an antiparticle is the same symbol used to denote its normal matter counterpart, but with an overstrike.

过去常用于表示一个反粒子的符号是以用来 表示它的常态物质版本的相同符号，仅有少许不同。

4.The polarised photons were able to take the place of the particle and the antiparticle in Dr Hardy's thought experiment because they obey the same quantum-mechanical rules.

极化的光子可以代替哈迪的思想试验中的粒子和反粒子，因为他们遵守同样的量子力学规则。

5.He further predicted that every elementary particle with a spin has its counterpart with the same mass but opposite electric charge, or that a particle has an antiparticle.

他进一步预言每一种自旋为的基本粒子都有质量相同但电荷相异的对应粒子，或者说，就是每个这样的粒子都有一个反粒子。

6.Thecurrent "standard model" of physics holds that each particle -protons, electrons, neutrons and a zoo of more exotic particles - has itsmirror image antiparticle.

在当前有关物理学的“标准模型”中，包括质子、电子、中子以及大量更怪异粒子在内的每一种粒子都有其反粒子“镜像”。

7.In particle physics, an antiparticle 反粒子 is a counterpart to a particle with the same mass but opposite charge.

在粒子物理学中，反粒子 是与粒子相对应的，质量相同但电荷相反的粒子。

8.In some high-energy collisions, scientists can create pairs of particles and their antiparticles 反粒子.

在一些高能碰撞中，科学家可以产生粒子及其反粒子的对。

9.When a particle meets its antiparticle 反粒子, they annihilate each other, releasing energy in the form of photons.

当一个粒子遇到它的反粒子时，它们会相互湮灭，以光子的形式释放能量。

10.The existence of antiparticles 反粒子 was first predicted by physicist Paul Dirac in 1928.

物理学家保罗·狄拉克在1928年首次预测了反粒子的存在。

11.Every known particle has a corresponding antiparticle 反粒子, such as the electron and positron.

每个已知粒子都有一个相应的反粒子，例如电子和正电子。

作文

In the fascinating realm of particle physics, one of the most intriguing concepts is that of the antiparticle. An antiparticle is a counterpart to a regular particle, possessing the same mass but opposite charge and quantum numbers. For instance, the antiparticle of an electron, which carries a negative charge, is called a positron, and it has a positive charge. This duality between particles and their antiparticles is fundamental to our understanding of the universe at a subatomic level.The existence of antiparticles was first predicted by physicist Paul Dirac in the 1920s. His groundbreaking work led to the formulation of the Dirac equation, which not only described the behavior of electrons but also implied the existence of antiparticles. This was a revolutionary idea at the time, as it suggested that for every particle in the universe, there exists a corresponding antiparticle. This concept was later confirmed experimentally with the discovery of the positron in 1932 by Carl Anderson.Understanding antiparticles is crucial for several reasons. Firstly, they play a significant role in the field of cosmology. Theoretical models suggest that during the Big Bang, equal amounts of matter and antimatter (the term used for systems involving antiparticles) were created. However, the observable universe is predominantly composed of matter. This asymmetry poses one of the biggest questions in modern physics: why is there more matter than antimatter? Research into this matter-antimatter imbalance could provide insights into the fundamental laws of nature.Secondly, antiparticles are not just theoretical constructs; they have practical applications as well. One of the most notable uses of antiparticles is in medical imaging techniques such as Positron Emission Tomography (PET). In PET scans, a radioactive substance that emits positrons is introduced into the body. When these positrons encounter electrons, they annihilate each other, producing gamma rays that can be detected and used to create detailed images of metabolic processes in the body. This technique has revolutionized the field of medical diagnostics and continues to be a vital tool in detecting diseases like cancer.Moreover, the study of antiparticles also contributes to our understanding of fundamental symmetries in physics. The concept of CP symmetry, which relates the properties of particles and antiparticles, is essential in explaining certain interactions in particle physics. Any violation of this symmetry could lead to a better understanding of why our universe is dominated by matter.In conclusion, the study of antiparticles opens up a myriad of possibilities in both theoretical and applied physics. From addressing profound questions about the origins of the universe to advancing medical technology, antiparticles are a key component of the intricate tapestry that makes up our understanding of the physical world. As research continues to evolve, the mysteries surrounding antiparticles will undoubtedly lead to new discoveries and innovations that could reshape our comprehension of the universe we inhabit.

在粒子物理学的迷人领域中，最引人入胜的概念之一就是反粒子。反粒子是常规粒子的对应物，具有相同的质量但相反的电荷和量子数。例如，电子的反粒子称为正电子，它带有正电荷。这种粒子与其反粒子之间的二元性是我们理解亚原子层面宇宙的基础。反粒子的存在最早是由物理学家保罗·狄拉克在20世纪20年代预测的。他的突破性工作导致了狄拉克方程的形成，该方程不仅描述了电子的行为，还暗示了反粒子的存在。这在当时是一个革命性的想法，因为它表明宇宙中的每个粒子都有一个对应的反粒子。这一概念后来通过卡尔·安德森在1932年发现正电子而得到了实验验证。理解反粒子至关重要，原因有几个。首先，它们在宇宙学领域中发挥着重要作用。理论模型建议，在大爆炸期间，产生了等量的物质和反物质（涉及反粒子的术语）。然而，可观察的宇宙主要由物质组成。这种不对称性提出了现代物理学中最大的一个问题：为什么物质比反物质多？对这种物质-反物质失衡的研究可能为我们提供有关自然基本法则的见解。其次，反粒子不仅是理论构造；它们也有实际应用。其中最显著的用途之一是在医学成像技术中，如正电子发射断层扫描（PET）。在PET扫描中，将一种释放正电子的放射性物质引入体内。当这些正电子遇到电子时，它们会互相湮灭，产生伽马射线，这些射线可以被检测并用于创建身体代谢过程的详细图像。这项技术彻底改变了医学诊断领域，并继续成为检测癌症等疾病的重要工具。此外，研究反粒子还有助于我们理解物理学中的基本对称性。与粒子和反粒子的特性相关的CP对称性概念在解释粒子物理学中的某些相互作用时至关重要。这种对称性的任何违反都可能导致我们更好地理解为什么我们的宇宙由物质主导。总之，反粒子的研究在理论和应用物理学中打开了无数可能性。从解决关于宇宙起源的深刻问题到推动医疗技术的发展，反粒子是构成我们对物理世界理解的复杂织锦的关键组成部分。随着研究的不断发展，围绕反粒子的谜团无疑将导致新的发现和创新，这可能重塑我们对所居住宇宙的理解。