The simulation shows a population of nuclear spins precessing around an external magnetic field at the Larmor frequency, being tipped by a radio-frequency pulse, and then relaxing back into alignment while their decaying signal (the free induction decay) is transformed into a peaked frequency spectrum with chemical shifts and multiplet splitting.
Adjust the external field strength slider to see the Larmor frequency shift, choose different simulated chemical environments to see their peaks move along the chemical shift axis, and toggle neighboring spins on or off to watch spin-spin coupling split a single peak into a doublet, triplet, or quartet.
Magnetic field strength slider, chemical environment select, neighboring spin toggle, pulse/play button, reset
The 2003 Nobel Prize in Physiology or Medicine was awarded for discoveries that turned nuclear magnetic resonance into magnetic resonance imaging, and modern clinical MRI scanners use magnetic fields tens of thousands of times stronger than Earth's own magnetic field to align and probe the hydrogen nuclei in water throughout the human body.
The simulation shows a population of nuclear spins precessing around an external magnetic field at the Larmor frequency, being tipped by a radio-frequency pulse, and then relaxing back into alignment while their decaying signal (the free induction decay) is transformed into a peaked frequency spectrum with chemical shifts and multiplet splitting.
The simulation shows a population of nuclear spins precessing around an external magnetic field at the Larmor frequency, being tipped by a radio-frequency pulse, and then relaxing back into alignment while their decaying signal (the free induction decay) is transformed into a peaked frequency spectrum with chemical shifts and multiplet splitting.
Adjust the external field strength slider to see the Larmor frequency shift, choose different simulated chemical environments to see their peaks move along the chemical shift axis, and toggle neighboring spins on or off to watch spin-spin coupling split a single peak into a doublet, triplet, or quartet.
The 2003 Nobel Prize in Physiology or Medicine was awarded for discoveries that turned nuclear magnetic resonance into magnetic resonance imaging, and modern clinical MRI scanners use magnetic fields tens of thousands of times stronger than Earth's own magnetic field to align and probe the hydrogen nuclei in water throughout the human body.