Reexamining blackbody shifts for hydrogenlike ions

U. Jentschura, Martin Haas

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We investigate blackbody-induced energy shifts for low-lying levels of atomic systems, with a special emphasis on transitions used in current and planned high-precision experiments on atomic hydrogen and ionized helium. Fine-structure- and Lamb-shift-induced blackbody shifts are found to increase with the square of the nuclear charge number, whereas blackbody shifts due to virtual transitions decrease with increasing nuclear charge as the fourth power of the nuclear charge. We also investigate the decay width acquired by the ground state of atomic hydrogen, due to interaction with blackbody photons. The corresponding width is due to an instability against excitation to higher excited atomic levels, and due to blackbody-induced ionization. These effects limit the lifetime of even the most fundamental, a priori absolutely stable, "asymptotic" state of atomic theory, namely, the ground state of atomic hydrogen.

Original languageEnglish
Article number042504
JournalPhysical Review A
Volume78
Issue number4
DOIs
Publication statusPublished - Oct 13 2008

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shift
ions
hydrogen
atomic theory
ground state
fine structure
helium
ionization
life (durability)
photons
decay
excitation
interactions
energy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Reexamining blackbody shifts for hydrogenlike ions. / Jentschura, U.; Haas, Martin.

In: Physical Review A, Vol. 78, No. 4, 042504, 13.10.2008.

Research output: Contribution to journalArticle

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