Precursor luminescence near the collapse of laser-induced bubbles in alkali-salt solutions

A precursor luminescence pulse consisting of atomic line emission is observed as much as 150 nanoseconds prior to the collapse point of laser-created bubbles in alkali-metal solutions. The timing of the emission from neutral Na, Li, and K atoms is strongly dependent on the salt concentration, which...

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Published in:Physical review letters 2009-05, Vol.102 (20), p.204301-204301, Article 204301
Main Authors: Chu, Han-Ching, Vo, Sonny, Williams, Gary A
Format: Article
Language:English
Subjects:
BUBBLES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
LASERS
LITHIUM
LUMINESCENCE
POTASSIUM
PULSES
SALTS
SODIUM
SOLUTIONS
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cited_by cdi_FETCH-LOGICAL-c506t-761adc5633ae52d8d478239fba6eca93c4ffa54c01d6f2a7e7e06343fb3ae8803
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creator Chu, Han-Ching
Vo, Sonny
Williams, Gary A
description A precursor luminescence pulse consisting of atomic line emission is observed as much as 150 nanoseconds prior to the collapse point of laser-created bubbles in alkali-metal solutions. The timing of the emission from neutral Na, Li, and K atoms is strongly dependent on the salt concentration, which appears to result from resonant radiation trapping by the alkali atoms in the bubble. The alkali emission ends at the onset of the blackbody luminescence pulse at the bubble collapse point, and the duration of the blackbody pulse is found to be reduced by up to 30% as the alkali-salt concentration is increased.
doi_str_mv 10.1103/physrevlett.102.204301
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subjects BUBBLES
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
LASERS
LITHIUM
LUMINESCENCE
POTASSIUM
PULSES
SALTS
SODIUM
SOLUTIONS
title Precursor luminescence near the collapse of laser-induced bubbles in alkali-salt solutions
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