Laboratory: CP-51 Phone: (859) 257-2761

Experimental Atomic Physics (AMO)

Research Interests

Interaction of highly excited (Rydberg-state) atoms with charged particles and fields. Coherence effects in collisions. Alignment and orientation in electron-atom and ion-atom collisions. Precision fine-structure spectroscopy of highly excited states. Collisions of coherent elliptic, circular and Stark Rydberg states. Laboratory measurement of collision processes relevant to the interstellar medium. Relationship of quantal, semi-classical and classical theoretical formulations of the Three-Body Problem applied to atomic collisions. Advanced instrumentation and techniques for research in highly excited atoms.

Education

• B.A., Physics Swarthmore College (1965)
• Ph.D., Experimental Atomic Physics, Harvard University (1971)

• K.B. MacAdam and C.S. Hwang, "The Stark ball: A programmable multipolar environment," Rev. Sci. Instrum. 74, 2267 (2003). pdf
• K.B. MacAdam and E. Horsdal-Pedersen, "Topical Review: Charge Transfer from Coherent Elliptic States," J. Phys. B. 36, R167 (2003). pdf
• S.F. Dyubko, V.A. Efremov, V.G. Gerasimov and K.B. MacAdam, "Microwave spectroscopy of Al I Rydberg states: F terms," J. Phys. B. 36, 3797 (2003). pdf.
• S. B�hm, A. M�ller, S. Schippers, W. Shi, H. Danared, N. Ekl�w, M. Fogel, R. Schuch, N. Djuric, G.H. Dunn and K.B. MacAdam, "Measurement of the field-induced dielectronic recombination rate enhancement of N4+ ions differential in the Rydberg quantum number n," Nucl. Instrum. Methods B 205, 370 (2003). pdf.
• K. Nagesha and K.B. MacAdam, "Electron impact ionization of sodium Rydberg atoms below 2 eV," Phys. Rev. Lett. 91, 113202 (2003). pdf.
• C.S. Hwang and K.B. MacAdam, "Electron Capture from Aligned p-State Rydberg Atoms," Phys. Rev. A. 68, 042709 (2003). pdf.
• S.F. Dyubko, V.A. Efremov, V.G. Gerasimov and K.B. MacAdam, "Microwave spectroscopy of Al I Rydberg states: D and G terms," J. Phys. B. 36, 4827 (2003). pdf.