The Zeeman effect and optical pumping are two mechanisms capable of inducing polarization signals in the spectral lines that originate in the outer layers of stellar atmospheres. The Zeeman effect 12 ...

Astronomers have now observed the radio emission from the neutral hydrogen gas (HI) in a nearby galaxy. Hydrogen gas emits radio emission in a spectral line at a very specific frequency of 1420 MHz.

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Transitions between different electronic energy levels in elements occur at unique energies and intensities, giving each element a distinctive emission spectrum. When the energy of an incident photon ...

Resonantly coupled photonic systems exhibiting dispersive and nontrivial line shapes are attracting growing attention in recent years. In particular, light–matter interactions are of interest owing to ...

SAN DIEGO, December 4, 2019 -- Atom music is a fun new way to explore the atomic world via musical synthesis techniques. Atoms absorb and release energy in the form of photons that we perceive as ...

Spectral examination is now the norm in fundamental and applied research, in applications covering detection of chemicals, process instrumentation, characterization of novel materials, and disease ...

High resolution and sensitivity are critical in nuclear magnetic resonance (NMR) spectroscopy. Both can be overdoubled when using heteronuclear decoupling. This enables the severance of overlapping ...