6533b827fe1ef96bd1285d5b
RESEARCH PRODUCT
Efficient, high-resolution resonance laser ionization spectroscopy using weak transitions to long-lived excited states
Iain MooreKieran FlanaganVolker SonnenscheinM. VerlindeGerda NeyensR. P. De Grootesubject
Physics - Instrumentation and DetectorsFOS: Physical sciencesHigh resolution01 natural sciencesResonance (particle physics)law.inventionlawIonization0103 physical sciencesPhysics::Atomic PhysicsNuclear Experiment (nucl-ex)010306 general physicsSpectroscopyNuclear Experimentexcited statesPhysicsta114010308 nuclear & particles physicsInstrumentation and Detectors (physics.ins-det)resonance laser ionization spectroscopyLaser3. Good healthPulse (physics)exotic nucleiExcited stateAtomic physicsExcitationdescription
Laser spectroscopic studies on minute samples of exotic radioactive nuclei require very efficient experimental techniques. In addition, high resolving powers are required to allow extraction of nu- clear structure information. Here we demonstrate that by using weak atomic transitions, resonance laser ionization spectroscopy is achieved with the required high efficiency (1-10%) and precision (linewidths of tens of MHz). We illustrate experimentally and through the use of simulations how the narrow experimental linewidths are achieved and how distorted resonance ionization spec- troscopy lineshapes can be avoided. The role of the delay of the ionization laser pulse with respect to the excitation laser pulse is crucial: the use of a delayed ionization step permits the best resolving powers and lineshapes. A high efficiency is maintained if the intermediate level has a lifetime that is at least of the order of the excitation laser pulse width. A model that describes this process re- produces well the observed features and will help to optimize the conditions for future experiments.
year | journal | country | edition | language |
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2017-03-07 |