ATM-34

Natural width

Lifetime broadening.

Reading speed

Atomicnatural width

Governing equation

\Gamma=\hbar A

where

A: A (1/s)
\Gamma: Width (µeV)

Lecture brief

Historical brief

Balmer, Rydberg, Bohr (1913), fine structure, Zeeman and Stern–Gerlach built the spectrum of one atom. The lab computes levels, selection and magnetic splitting. This sheet (ATM-34 — Natural width) is the form associated with natural width. Working symbols: $A$ $\rightarrow$ $\Gamma$ . Lifetime broadening.

Purpose

Purpose: compute

\Gamma

from

A

in Atomic physics via

\Gamma=\hbar A

Lifetime broadening. Use it when a real atomic physics question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

A = 1.000e+8\,\mathrm{1/s}

, the governing relation

\Gamma=\hbar A

yields

\Gamma = 0.0658\,\mathrm{\mu eV}

. Lifetime broadening. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

A A100000000 1/s

Outputs

Width \Gamma0.0658 µeV

Reading speed

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Narration of this film

Lifetime broadening.

Reading speed

Watch on YouTube