The influence of Rydberg populations on the charge state evolution of 700-MeV foil-excited Kr ions

Journal Article · Wed May 01 04:00:00 EDT 1996 · Bulletin of the American Physical Society

OSTI ID:394129

Kanter, E P; Ali, R; Dunford, R W ^[1]

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1. Univ. of Toledo, OH (United States); and others

Traditional beam-foil methods of measuring the lifetimes for low-lying atomic levels are impractical beyond Z {approximately} 35 because of the correspondingly shorter flight times when lifetimes become shorter than a few tens of picoseconds. The authors recently reported the results of an experiment using a novel two-foil method to measure the 9.5 psec lifetime of the 2 {sup 3}P{sub 2} level in heliumlike krypton. They report here the results of an extension of that experiment in which they measured the time evolution of the N {ge} 2 excited state population between the foils by observing the dependence upon foil seperation of the charge state distributions emerging from the second foil. The results are consistent with the well-known power-law dependence of Rydberg-fed atomic transitions observed in beam-foil studies, but probe a much shorter time scale than has hitherto been accessible.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 394129
• Report Number(s): CONF-9605105--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 3 Vol. 41; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHARGE STATES
EXCITED STATES
KRYPTON IONS
MEV RANGE 100-1000
RYDBERG STATES
TIME DEPENDENCE