[en] The importance of core-polarization effects on oscillator strength determination in Ce III is emphasized. The inclusion of these effects in relativistic Hartree-Fock (HFR) calculations leads to theoretical lifetime values for some 4f6p levels of this ion in close agreement with recent time-resolved laser-induced fluorescence measurements. These new atomic data, the most accurate to date, have allowed the refinement of the stellar abundance determination of cerium in the chemically peculiar star HD 192913, but have not altered in a drastic way the conclusions derived in recent analyses regarding the overabundance of this element.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Biémont, Emile ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Quinet, Pascal ; Université de Liège - ULiège > Département de physique > Physique nucléaire, atomique et spectroscopie
Ryabchikova, T. A.
Language :
English
Title :
Core-polarization effects in doubly ionized cerium (Ce III) for transitions of astrophysical interest
Biémont E., Froese Fischer C., Godefroid M. R., Palmeri P., Quinet P., 2000a, Phys. Rev. A, 62, 032512
Biémont E., Pinnington P. H., Quinet P., Zeippen C. J., 2000b, Phys. Scr., 61, 567
Biémont E., Garnir H.-P. Palmeri P., Quinet P., Li Z. S., Zhang Z. G., Svanberg S., 2001, Phys. Rev. A, 64, 022503
Bord D. J., Cowley C. R., Norquist P. L., 1997, MNRAS, 284, 869
Cowan R. D., 1981, The Theory of Atomic Structure and Spectra. Univ. California Press, Berkeley
Cowley C. R., 1976, ApJS, 32, 631
Fraga S., Karwowski J., Saxena K. M. S., 1976, Handbook of Atomic Data. Elsevier, Amsterdam
Jaschek C., Jaschek M., 1995, The Behavior of Chemical Elements in Stars. Cambridge Univ. Press, Cambridge
Li Z. S., Lundberg H., Wahlgren G. M., Sikström C. M., 2000, Phys. Rev. A, 62, 032505
Li Z. S. et al., 2001, J. Phys. B: At. Mol. Opt Phys., 34, 1349
Martin W. C., Zalubas R., Hagan L., 1978, NSRDS - NBS 60, Atomic Energy Levels - The Rare Earth Elements. US Dept. Commerce, Washington, DC
Mashonkina L. I., Ryabtsev A. N., Ryabchikova T. A., 2002, Astron. Lett., 28, 23
Quinet P., Palmeri P., Biémont E., McCurdy M. M., Rieger G., Pinnington E. H., Wickliffe M. E., Lawler J. E., 1999, MNRAS, 307, 934
Ryabchikova T. A., Ptitsyn D. A., 1986, in Cowley C. R., Dworetsky M. M., Mégessier C., eds, Upper Main Sequence Stars with Anomalous Abundances. Reidel, Dordrecht, p. 319
Ryabchikova T. A., Davidova E. S., Adelman S. J., 1990, PASP, 102, 581
Ryabchikova T. A., Savanov I. S., Malanushenko V. P., Kudryavtsev D. O., 2001, Astron. Rep., 45, 382
