1s(2s2pP1)P2nl , 1s(2s3sS3,1)S2np , and 1s(2s3pP1)P2ns K-shell photoexcited Rydberg series of beryllium atoms
Abstract
The inner-shell photoexcitation of the Rydberg series of Be atoms is explored from both experimental and theoretical points of view. We used synchrotron radiation to photoionize Be atoms and the time-of-flight method to record charge-separated photoion yield spectra. Many new autoionizing resonance peaks were observed in the Be2+ and Be+ spectra. They were categorized as Rydberg series members converging to the 1s(2s2pPo1)Po2 , 1s(2s3sS3)S2 , and 1s(2s3sS1)S2 series limits. Furthermore, numerical calculations using multiconfiguration Dirac-Fock (MCDF) method enabled us to assign unknown resonance peaks as the 1s(2s3pPo3)Po2ns series members. The calculation of the ground state of Be atoms revealed that the admixture of the 1s22p2 into the ground state amounts to 8.67%.
- Publication:
-
Physical Review A
- Pub Date:
- January 2007
- DOI:
- 10.1103/PhysRevA.75.012714
- Bibcode:
- 2007PhRvA..75a2714Y
- Keywords:
-
- 32.80.Fb;
- 32.80.Dz;
- Photoionization of atoms and ions;
- Autoionization