Improved theory of helium fine structure
Abstract
Improved theoretical predictions for the fine-structure splitting of 23PJ levels in helium are obtained by the calculation of contributions of order α5 Ry. New results for transition frequencies, 01 = 29 616 943.01(17) kHz and 12 = 2 291 161.13(30) kHz disagree significantly with the experimental values, indicating an outstanding problem in bound state QED.
0
Turn this paper into a full lesson
ArcXiv compiles a staged curriculum from this paper: 8-12 lessons across beginner → advanced, synthesised section guides, visuals, flashcards, a quiz, exercises, and on-demand deep dives per section. Grounded in the abstract, never invented.