Jump to ContentJump to Main Navigation
Niels Bohr and the Quantum AtomThe Bohr Model of Atomic Structure 1913–1925$
Users without a subscription are not able to see the full content.

Helge Kragh

Print publication date: 2012

Print ISBN-13: 9780199654987

Published to Oxford Scholarship Online: May 2012

DOI: 10.1093/acprof:oso/9780199654987.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 26 September 2021

The Bohr–Sommerfeld Theory

The Bohr–Sommerfeld Theory

(p.140) 4 The Bohr–Sommerfeld Theory
Niels Bohr and the Quantum Atom

Helge Kragh

Oxford University Press

With A. Sommerfeld’s extension of the Bohr theory in 1915–1916, it was turned into a powerful tool of atomic research and adopted and further developed by German physicists in particular. The new and more general Bohr–Sommerfeld theory described the atom in terms of two quantum numbers, while Bohr had originally used only one quantum number. With this extension the theory provided an explanation of the Stark effect, the ordinary Zeeman effect, and the fine structure of the hydrogen spectrum. Other developments based on X-ray spectroscopy were less successful, as were attempts to understand the structure of the helium atom. Yet, by 1920 nearly all physicists accepted the theory as the only viable framework for atomic and quantum research. But not all agreed: the chapter includes an account of conceptual and other objections against the theory raised by J. Stark in Germany and a few other physicists.

Keywords:   Arnold Sommerfeld, hydrogen, X-ray spectroscopy, quantum numbers, Bohr–Sommerfeld theory, Zeeman effect, helium atom, Johannes Stark

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .