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 language | English |
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Pages (from-to) | 414-417 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 75 |
Issue number | 3 |
DOIs | |
State | Published - 1995 |