Positronium-dipole induced resonances in e+-H and e+-alkali systems. (20th January 2017)

• Record Type: Journal Article
• Authors: Umair, M; Jonsell, S
• Is Part Of: Journal of physics. Volume 50:Number 4(2017:Feb. 15)
• Publication Date: 2017-01-20
• Subjects: positronium -- resonances -- dipole series -- three-body systems; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/1361-6455/aa52e1
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: We derive general universal scaling relations governing resonances induced by the dipole moment of excited positronium interacting with atomic ions. A single non-universal parameter, which contains all the system-dependent information, is defined. Our results are compared to numerical calculations, using complex scaling, for S, P, and D -wave resonances below the positronium n = 2 threshold in the e + -(H, Li, Na, K) systems. The energy and width ratios of the successive resonances are found to agree well with the analytically derived scaling law.