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Measurement of atomic lifetimes with a mode-locked laser
B M Patterson1, C D Lindstrom, T Takekoshi
1Department of Physics, United States Air Force Academy, Colorado 80840, USA. brian.patterson@usafa.af.mil
Optics Letters
|September 30, 2003
Summary
Researchers developed a new laser technique to measure atomic lifetimes. This method precisely determines the decay rate of excited atomic states, demonstrated using cesium atoms.
Area of Science:
- Atomic Physics
- Laser Spectroscopy
- Quantum Mechanics
Background:
- Accurate measurement of atomic lifetimes is crucial for understanding atomic structure and interactions.
- Traditional methods for determining excited-state lifetimes can be complex and time-consuming.
Purpose of the Study:
- To introduce and validate a novel technique for measuring atomic lifetimes using a mode-locked laser system.
- To determine the excited-state lifetime of the 6P(3/2) state in cesium atoms with high precision.
Main Methods:
- Utilized a mode-locked laser to excite cesium atoms with a single pulse.
- Employed a frequency-doubled pulse for time-resolved ionization of excited atoms.
- Collected and counted resulting ions to determine the excited-state decay rate by varying pulse separation.
Main Results:
- Successfully measured the atomic lifetime of the cesium 6P(3/2) state.
- Obtained a lifetime value of 30.5 nanoseconds with a statistical uncertainty of 0.1 nanoseconds.
- Identified systematic effects contributing to an overall experimental uncertainty of approximately 0.6 nanoseconds in this initial study.
Conclusions:
- The presented laser-based technique offers a precise and efficient method for measuring atomic lifetimes.
- The results provide valuable data for the 6P(3/2) state of cesium, contributing to atomic physics research.
- Further refinement of the technique can potentially reduce systematic uncertainties for future measurements.