4pnp J=0(e)-2(e) autoionizing series of calcium: Experimental and theoretical analysis (Journal article)

Bolovinos, A./ LucKoenig, E./ Assimopoulos, S./ Lyras, A./ Karapanagioti, N. E./ Charalambidis, D./ Aymar, M.

The even parity 4pnp J = 0, 1, 2 doubly excited autoionizing states of neutral calcium in an atomic beam are investigated by a two-step isolated core excitation (ICE) method using two different combinations of polarization of the laser beams. The different excited energy levels are assigned to nine autoionizing Rydberg series 4p(1/2,3/2)nP J = 0, 1, 2 for 8 less than or equal to n less than or equal to 22. The theoretical interpretation is achieved by a combination of the eigenchannel R-matrix theory and the multichannel quantum defect (MQDT) method. Two, five and six closed interacting channels are introduced for the J = 0, J = 1 and J = 2 series respectively. Theoretical energy level positions, autoionization widths and excitation profiles are compared with the experimental data, confirming the identification of the observed structures and providing evidence of extended mixing between the 4p(1/2)np and 4p(3/2)np series.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: r-matrix calculation,laser optogalvanic spectroscopy,rydberg states,barium,strontium,threshold,spectrum,resonances,parameters,inversion
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/16826
ISSN: 0178-7683
Link: <Go to ISI>://A1996VZ45600002
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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