Spectroscopy of Cd2 and Zn2 molecules in free-jet supersonic beams: experimental and theoretical studies

• Autorzy: Ruszczak M , Strojecki M , Krośnicki M , Łukomski M , Koperski J
• Języki publikacji: EN

Abstrakty

EN

A method of supersonic beam combined with techniques of laser spectroscopy and simulations of spectra were employed to study interatomic potentials of Cd2 and Zn2 molecules. Total laser induced fluorescence was recorded after an excitation of Cd2 using laser radiation in the range of 2200–2260 Å. The observed structures are interpreted as due to the transitions from υ" = 0 in the ground state to vibrational levels below the potential barrier of the 11u(51P1) electronic state. Studies of Zn2 consisted of simulations of excitation and fluorescence spectra recorded at the transition. In the simulations, both isotopic and rotational structures were taken into account.

Słowa kluczowe

EN

cadmium dimer; zinc dimer; potential energy curves; ab initio potentials; excitation spectra; fluorescence spectra; van der Waals molecules; supersonic free-jet beam

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2006
• Tom: Vol. 36, nr 4
• Strony: s. 451--459
• Opis fizyczny: Bibliogr. 19 poz., wykr.

Twórcy

autor

Ruszczak M

• Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland

autor

Strojecki M

• Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland

autor

Krośnicki M

• Institut für Theoretische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
• Institute of Theoretical Physics and Astrophysics, University of Gdańsk, Wita Stwosza 57,80-952 Gdańsk, Poland

autor

Łukomski M

• Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland

autor

Koperski J

• Marian Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland

Bibliografia

• [1] KOWALSKI A., CZAJKOWSKI M., BRECKENRIDGE W.H., Laser excitation spectrum of the transition in Cd2, Chemical Physics Letters 119(4), 1985, pp. 368–70.
• [2] CZAJKOWSKI M., BOBKOWSKI R., KRAUSE L., transitions in Cd2 excited in crossed molecular and laser beams, Physical Review A 40(8), 1989, pp. 4338–43.
• [3] CZAJKOWSKI M., KOPERSKI J., The Cd2 and Zn2 van der Waals dimers revisited. Correction for some molecular potential parameters, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 55(11), 1999, pp. 2221–9.
• [4] KOPERSKI J., ŁUKOMSKI M., CZAJKOWSKI M., Laser excitation spectrum and spectroscopic potential parameters of Cd2 molecule in the 1u(53P2) energy state, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 58(5), 2002, pp. 927–32.
• [5] ŁUKOMSKI M., KOPERSKI J., CZUCHAJ E., CZAJKOWSKI M., Structure of excitation and fluorescence spectra recorded at the transition of Cd2, Physical Review A 68(4), 2003, 042508; Erratum: Phys. Rev. A 69, 2004, 049901(E).
• [6] ŁUKOMSKI M., KOPERSKI J., Nuclear-spin intensity alternation and rotational-levels symmetry properties in isotopically-resolved excitation spectrum of Cd2, Chemical Physics Letters 384(4–6), 2004, pp. 317–9.
• [7] ŁUKOMSKI M., RUSZCZAK M., CZUCHAJ E., KOPERSKI J., Evidence of a weak dipole transition moment between the and 31u(53P1) electronic energy states in Cd2, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 61(8), 2005, pp. 1835–40.
• [8] CZAJKOWSKI M., BOBKOWSKI R., KRAUSE L., transitions in Zn2 excited in crossed molecular and laser beams, Physical Review A 41(1), 1990, pp. 277–82.
• [9] STROJECKI M., RUSZCZAK M., KROŚNICKI M., ŁUKOMSKI M., KOPERSKI J., The -state potential of Zn2 obtained from excitation spectrum recorded at the transition, Chemical Physics 327(2–3), 2006, pp. 229–36.
• [10] LEROY R.J., LEVEL 7.7, University of Waterloo Chemical Physics Research; Report CP-661, 2005. The source code http://leroy.uwaterloo.ca.
• [11] LEROY R.J., KRAEMER G.T., BCONT 2.2, University of Waterloo Chemical Physics, Research Report CP-650R2, 2004. The source code: http://leroy.uwaterloo.ca.
• [12] WERNER H.-J., KNOWLES P.J., LINDH R., SCHÜTZ M., CELANI P., KORONA T., MANBY F.R., RAUHUT G., AMOS R.D., BERNHARDSSON A., BERNING A., COOPER D.L., DEEGAN M.J.O., DOBBYN A.J., ECKERT F., HAMPEL C., HETZER G., LLOYD A.W., MCNICHOLAS S.J., MEYER W., MURA M.E., NICKLASS A., PALMIERI P., PITZER R., SCHUMANN U., STOLL H., STONE A.J., TARRONI R., THORSTEINSSON T., MOLPRO, version 2002.6, a package of ab initio programs, 2003; see http://www.molpro.net.
• [13] KOPERSKI J., Study of diatomic van der Waals complexes in supersonic beams, Physics Reports 369(3), 2002, pp. 177–326.
• [14] RUSZCZAK M., STROJECKI M., KOPERSKI J., Short-range repulsion in the -state potential of the CdRG (RG = Ar, Kr) molecules determined from a direct continuum← bound excitation detected at the transition, Chemical Physics Letters 416(1–3), 2005, pp. 147–51.
• [15] HERZBERG G., Molecular Spectra and Molecular Structure. I. Spectra of Diatomic Molecules, D. Van Nostrand, Princeton, New Jersey 1950.
• [16] CZUCHAJ E., private communication, 2005.
• [17] BROWN J.M., CARRINGTON A., Rotational Spectroscopy of Diatomic Molecules, 1st Edition, Cambridge University Press, Cambridge 2003.
• [18] KUTNER T., DAGLEWICZ-NOWAK R., GRYCUK T., Fluorescence spectra of the Cd2 dimer: transitions involving and 1u Rydberg states and the lowest excited gerade states, Chemical Physics Letters 384(1–3), 2004, pp. 171–8.
• [19] KUTNER T., KUBKOWSKA M. K., GRYCUK T., Absorption and emission studies of the transition in the Cd dimer, Journal of Molecular Spectroscopy 233(1), 2005, pp. 149–56.