M.A.Czajkowski – fields of  interest

(a) Spectroscopy  of  van  der Waals molecules ( complexes ). Molecules such  as : CdRG , ZnRG , and MgRG   ( RG  stands  for He , Ne , Ar , Kr , and  Xe atoms )   formed in a  cold supersonic molecular  jet-expansion  beam are subject of  excitation  and  their  spectra  studied using techniques of  laser  spectroscopy. Excitation  and  fluorescence spectra  are  measured and

analyzed  by means  of various numerical  methods , leading  to  spectroscopic determination of

potential  energy curves  parameters for  the  appropriate molecular  states. Computer  simulation of the experimental  spectra  is  also employed and  leads to  a  better understanding  of  the  molecular  structure.

(b) Rydberg  Molecules : An extension of the  above described experimental approach  which  includes the “ optical –optical – double resonance “ method  leads  to  studies of  higher Rydberg

states of  the  van  der  Waals molecules – an  exciting  new  area  of  laser  spectroscopy. The  results  of  such  investigation  can  be  compared with  the  latest  ab  initio calculations and  the  theoretical predictions can  be  verified. The  lowest  Rydberg  states of  CdNe , Cd Ar and  CdKr have been   already  investigated  in  our  laboratory and  some theoretically  predicted  excited molecular  states  with double  minima in  their  potential  energy  curves has  been  found .



      Some  Refereed Journals Publications


1.      M.Czajkowski , W.Kedzierski ,J.Koperski (2007) “Interatomic potential parameters of  

       CdHe  van der Waals complex derived from excitation spectrum of the C11(51P1)←X0+    

      vibrational  transitions “. Spectrochimica Acta Part A67(2007)730



2.  M.Czajkowski and J.Koperski (2005) Experimental studies of  a  double-well potential 

      energy curves    theoretically  implied  as the representation of  the  lowest molecular      

            Rydberg  states of CdRG(RG = Ne,Ar,Kr) diatomic  clusters

              SPIE Proceedings, vol.5849 ,pp 70-81 (2005)


  3  A.S.Czajkowski and M.A .Czajkowski ,(2005) “Sensitized fluorescence and excitation

         energy transfer in inelastic collisions of Cd(53P1 ) and Cs(6S1/2) atoms”,SPIE

         Proceedings,  vol.5849 , pp.250-252,(2005)





    4 .    J.Koperski and M.Czajkowski (2004) Electronic structure of the CdKr lowest Rydberg 

           state determined from laser-excitation spectra using supersonic beam and double

           optical  resonance method”.  Phys.Rev A  69 , 042509-1


      5.     M.Lukomski, J.Koperski , E.Czuchaj and M.Czajkowski : (2003)   “The structure of

               excitation  spectra recorded at the O+u(51P1) - X0g+ transition of Cd2 .   Phys Rev.A 

               68, 042508 (2003).


6.          J.Koperski and M.A.Czajkowski :(2003)” Potential energy barrieres observed in CdNe 

           and CdAr  van der Waals complexes excited in the first E1(3Σ+) Rydberg state.”

                The Proceedings of The Society of Photo-Optical  Instrumentation  Engineers (SPIE) ,

                 vol.5258 ,p.13 - 20


7.           M.Lukomski , J.Koperski and M.A.Czajkowski (2003) Laser spectroscopy of van

           der Waals  molecules  in supersonic beam. Example of the CdKr and Cd2 complexes”

                 The Proceedings of SPIE ,vol.5258 , 121 - 126


      8.      M.Czajkowski and J. Koperski: (2003) ,”The structure of the lowest electronic Rydberg

                state of  CdAr complex as determined by laser double resonance method in a

                supersonic jet-expansion beam” ,   Spectrochimica Acta Part A ,59, 2435


 9.   J.Koperski,  M.Lukomski and M.Czajkowski, 2002 ,”Spectroscopic characterization of 

         the X0+, B1 and A0+ molecular states of the CdXe van der Waals complex “

               Acta Physica Polonica B ,33, 2283


                  10.  M. Lukomski , J.Koperski and M.Czajkowski, 2002. “Double-well potential energy

                          curve of the B1 state in cadmium-krypton molecule, Spectrochimica Acta PartA58,1757


      11.   J. Koperski  and M. Czajkowski, 2002. Spectroscopical  characterization of CdNe

               van der Waals complex in the E1 (3Σ+) Rydberg state”,Chem. Phys .Lett 357 , 119


      12.   J. Koperski and M. Czajkowski, 2002.  “Short-range characterization of the MeAr (Me = 

              Zn, Cd) ground-state potentials from fluorescence spectra  J. Molec. Spectr.212, 162


13.   J.Koperski ,  M.Lukomski and M.Czajkowski, 2002.  “Laser spectroscopy of CdKr

          molecules in ultraviolet region”, , Spectrochimica Acta Part A, 58, 2709


14.    J. Koperski , M.  Lukomski and M.Czajkowski, 2002. “Laser excitation spectrum and

          spectroscopic potential parameters of Cd2 molecule in the 1u(53P2) energy state”

       .  Spectrochimica Acta, Part A 58, 927


       15.    J.Koperski and M.  Czajkowski 2001. Interatomic potential parameters of CdHe van

                der  Waals complex in A30+,  B31 and X10+ states - revisited”, Chem. Physics Letters.

                 350,367, (2001)