Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

142 Poster session, H29First analysis of the Ångström bands system (B 1 Σ + -A 1 Π) in the rare12 C 17 O isotopic moleculeR. Hakalla 1 , W. Szajna 2 , M. Zachwieja 3 , I. Piotrowska 4 , M. Ostrowska-Kopeć 5 ,P. Kolek 6 , and R. Kępa 71 Atomic and Molecular Physics Laboratory, Institutute of Physics, University ofRzeszów, ul. Rejtana 16A, Rzeszów, POLAND, hakalla@univ.rzeszow.pl;2 szajna@univ.rzeszow.pl; 3 zachwiej@univ.rzeszow.pl; 4 ipiotrowska@if.univ.rzeszow.pl;5 mostrow@univ.rzeszow.pl; 6 pkolek@univ.rzeszow.pl; 7 rkepa@univ.rzeszow.plHakalla R.Szajna W.Zachwieja M.Piotrowska I.Ostrowska-Kopec M.Kolek P.Kepa R.The Ångström bands system (B 1 Σ + -A 1 Π) so far unobserved in the rare 12 C 17 O isotopicmolecule has been obtained under high resolution as an emission spectrum using a highaccuracy dispersive optical spectroscopy.In total, 200 transition wave numbers belonging to the (0-1) and (0-2) bands wereprecisely measured and rotationally analyzed. The obtained result was the mergedrotational constants B 0 =1.8988823(41) cm −1 and D 0 =6.4283(26)·10 −6 cm −1 for the B 1 Σ +Rydberg state as well as the individual rotational constants B 1 =1.54088(12)cm −1 ,D 1 =6.950(87)·10 −6 cm −1 , B 2 =1.519292(69)cm −1 , D 2 =8.22(16)·10 −6 cm −1 for the A 1 Πstate in the 12 C 17 O isotopologue. The 0−v′′ bands origins were also calculated.Moreover, numerous rotational perturbations observed in the A 1 Π state in 12 C 17 Oisotopic molecule were identified and analyzed in detail. The observed perturbationswere confronted with those predicted from theoretical calculations. Simultaneously, theB 1 Σ + (v′ = 0) Rydberg state was observed which turned out to be quite regular up to theJ max level.Fig. 1: Band-head region of the B 1 Σ +- A 1 Π emission spectrum of the rare 12 C 17 O isotopicmolecule for the 0-2 band (as an example). Part of the less intense 0-2 band of theÅngström system in the 12 C 16 O molecule is showed at left (its band head is marked withasterisk). The dotted lines indicate the tips of the relatively very strong Th calibrationlines.