Nonstatistical behavior of the photoionization of spin–orbit doublets. (3rd May 2021)

• Record Type: Journal Article
• Authors: Püttner, Ralph; Martins, Jessica B; Marchenko, Tatiana; Travnikova, Oksana; Guillemin, Renaud; Journel, Loïc; Ismail, Iyas; Goldsztejn, Gildas; Koulentianos, Dimitris; Céolin, Denis; Rocco, Maria Luiza Miranda; Piancastelli, Maria Novella; Simon, Marc; Keating, David A; Rasadi Munasinghe, C; Deshmukh, Pranawa C; Manson, Steven T
• Is Part Of: Journal of physics. Volume 54:Number 8(2021)
• Publication Date: 2021-05-03
• Subjects: photoionization -- interchannel coupling -- relativistic effects; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/abef51
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: The photoionization branching ratios of spin–orbit doublets are studied both experimentally and theoretically at energies several keV above threshold. The results show significant relativistic effects for Ar 2 p in the autoionizing region below the 1 s threshold, and large many-body effects for Xe 3 d and 4 d in the vicinity of the L-shell thresholds. The branching ratios in Xe are also found to vary significantly over very broad multi-keV energy regions both above and below the inner-shell thresholds. In addition, the Ar 2 p study confirms experimentally the decades-old theoretical prediction that the nonresonant branching ratio does not approach the statistical (nonrelativistic) value, and, in fact, progressively diverges from statistical with increasing photon energy.