Electron affinity of strontium

D. Berkovits*, E. Boaretto, S. Ghelberg, O. Heber, M. Paul

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

We have observed a threshold in the electron photodetachment cross section of S88r- ions at a photon energy hν=1.820 eV and assign it to a p-wave transition from the 5s25p P2 ground state in Sr- to the 5s5p P3 state in neutral Sr. The measurement was made with a new technique combining the tunable laser photodetachment threshold method with accelerator mass spectrometry. We determine for the first time the electron affinity of Sr to be 48±6 meV, much smaller than predicted in recent calculations. The P1/22- P3/22 fine splitting of the Sr- ground state is estimated to be 26±8 meV.

Original languageEnglish
Pages (from-to)414-417
Number of pages4
JournalPhysical Review Letters
Volume75
Issue number3
DOIs
StatePublished - 1995

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