V2EX larmor frequency

Larmor Frequency

释义 Definition

拉莫尔频率:带磁矩的粒子(如电子、自旋或原子核)在外加磁场中发生拉莫尔进动时的进动频率。常用关系式为
\[ \omega_0 = \gamma B \] 其中 \(\omega_0\) 为角频率,\(\gamma\) 为旋磁比,\(B\) 为磁场强度。(对应的普通频率 \(f=\omega_0/2\pi\))

发音 Pronunciation (IPA)

/lrmr frikwnsi/

例句 Examples

The Larmor frequency increases when the magnetic field gets stronger.
当磁场变强时,拉莫尔频率会增大。

In NMR, precise tuning to the Larmor frequency allows nuclei to absorb and re-emit radiofrequency energy, producing measurable signals.
在核磁共振(NMR)中,精确调谐到拉莫尔频率会使原子核吸收并再辐射射频能量,从而产生可测量的信号。

词源 Etymology

Larmor 来自爱尔兰物理学家 Joseph Larmor(约瑟夫拉莫尔) 的姓氏,他在 19 世纪末提出并发展了与带电粒子在磁场中进动相关的理论;frequency 源自拉丁语 frequentia(“频繁、次数”)。合起来指“拉莫尔(动)对应的频率”。

相关词 Related Words

文学与著作 Notable Works

  • Aether and Matter Joseph Larmor
  • Principles of Magnetic Resonance Charles P. Slichter
  • Spin Dynamics: Basics of Nuclear Magnetic Resonance Malcolm H. Levitt
  • Modern Quantum Mechanics J. J. Sakurai & Jim Napolitano
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