How is spin measured experimentally ?

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In summary, the conversation discusses the measurement of spin in particles and how it is determined experimentally. The Stern-Gerlach Experiment is mentioned as a helpful resource in understanding spin. It is also noted that spin is not the physical rotation of a particle in 3D space.
  • #1
xortdsc
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Hi,

this probably has been answered somewhere here already, but I was unable to find it.
Could someone explain how the spin of a particle is actually measured in an experiment ? Most interesting to me is how the 3d spin vector for 1/2 spin particles is determined experimentally.

Cheers.
 
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  • #2
It is impossible to measure a 3d spin vector - i.e. all three components - of anything.
 
  • #4
thank you. the Stern-Gerlach Experiment was helpful indeed.
 

1. How is spin measured in an experiment?

In an experiment, spin is measured using a technique called magnetic resonance imaging (MRI). This involves placing an object, such as a molecule or atom, in a strong magnetic field and then using radio waves to excite the spin of its particles. The resulting signals are then analyzed to determine the spin properties of the object.

2. What is the principle behind spin measurement?

The principle behind spin measurement is based on the fact that particles with spin, such as electrons and protons, behave like tiny magnets. When placed in a magnetic field, they will align either parallel or anti-parallel to the field, which can be detected and measured.

3. How accurate is spin measurement in experiments?

The accuracy of spin measurement in experiments depends on various factors, such as the strength of the magnetic field, the sensitivity of the equipment used, and the stability of the system. Generally, the accuracy can be within a few parts per million.

4. Can spin measurement be used to study different types of particles?

Yes, spin measurement can be used to study different types of particles, including atoms, molecules, and subatomic particles such as electrons and protons. However, the techniques and equipment used may vary depending on the type of particle being studied.

5. What are some applications of spin measurement in scientific research?

Spin measurement has various applications in scientific research, including in the fields of physics, chemistry, and biology. It is used to study the magnetic properties of materials, analyze molecular structures, and understand the behavior of particles in different environments. It also has applications in medical imaging, such as in MRI scans, to study the structure and function of tissues and organs in the body.

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