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

Poster session, J28 191New analysis of the triplet (b 3 Σ - – a 3 Π) system of the AlHW. Szajna 1 , R. Hakalla 2 , M. Zachwieja 3 ,I. Piotrowska 4 , M. Ostrowska-Kopeć 5 , P. Kolek 6 , R. Kępa 71,2,3,4,5,6,7 Atomic and Molecular Physics Laboratory, Institute of Physics,University of Rzeszów, 35-310 Rzeszów, POLAND1 szajna@univ.rzeszow.pl, 2 hakalla@univ.rzeszow.pl, 3 zachwiej@univ.rzeszow.pl,4 ipiotrowska@if.univ.rzeszow.pl, 5 mostrow@univ.rzeszow.pl,6 kolek@if.univ.rzeszow.pl, 7 krepa@univ.rzeszow.pl,Szajna W.Hakalla R.Zachwieja M.Piotrowska I.Ostrowska-Kopec M.Kolek P.Kepa R.The emission spectrum of the b 3 Σ - – a 3 Π system of the AlH molecule was reinvestigatedin the spectral region of about 26 000 cm -1 by using a high accuracy dispersive opticalspectroscopy. The AlH molecules were formed and excited in an aluminium hollowcathodelamp with two anodes, filled with a mixture of Ne buffer gas and a trace ofNH 3 . The emission from the discharge was observed with a plane grating spectrographand recorded by a photomultiplier tube. The full rotational structure of the 0-0 and 1-1bands was precisely measured end rotationally analyzed and many new constants of theb 3 Σ - and a 3 Π states have been derived from the analysis. Also, pointed out by Zhu et al. 1differences in the λ constants values for the υ = 0 and υ = 1 of the b 3 Σ - state have beenexplained. Although the b - a system has previously been seen in emission 2,3,4,5 , ourwork represents the first modern and complete analysis of this transition of the AlHmolecule.Fig. 1: An overview of the b 3 Σ - – a 3 Π system of AlH in the spectral region of 26 000 cm -1 .References[1] Y. Zhu, R. Shehadeh, E. Grant, J. Chem. Phys., 97, 883, 1992.[2] W. Holst, Z. Phys., 86, 338, 1933.[3] C. N. Challacombe, G. M. Almy, Phys. Rev., 51, 930, 1937.[4] M. Rafi, M. Aslam Baig, Il Nuo. Cim., 43, 271, 1978.[5] C. Tao, X. Tan, P. Dagdigian, M. Alexander, J. Chem. Phys., 118, 10477, 2003.