Intrinsic spin

Definition

Intrinsic spin is a fundamental property of elementary particles, indicating an inherent form of angular momentum. Unlike orbital angular momentum, intrinsic spin is quantized and does not depend on the particle's motion in space.

5 Must Know Facts For Your Next Test

1. Intrinsic spin values are quantized and can only take on specific half-integer or integer values (e.g., $\pm \frac{1}{2}$, $\pm 1$).
2. The concept of intrinsic spin was introduced to explain fine structure in atomic spectra.
3. Electrons have an intrinsic spin value of $\pm \frac{1}{2}$, which contributes to the splitting of spectral lines.
4. Intrinsic spin interacts with magnetic fields, leading to phenomena such as the Zeeman effect.
5. Spin quantum numbers are used along with other quantum numbers to fully describe the state of a particle.

Review Questions

• What is the intrinsic spin value for an electron?
• How does intrinsic spin contribute to the splitting of spectral lines?
• What phenomenon occurs due to the interaction between intrinsic spin and magnetic fields?

Related terms

Quantum Number: A number that quantifies certain characteristics of particles in quantum mechanics, such as energy levels or angular momentum.

Zeeman Effect: The splitting of a spectral line into multiple components in the presence of a static magnetic field due to interaction with intrinsic spin.

Fine Structure: Small splittings in atomic energy levels caused by electron spin and relativistic corrections.