Anomalous profile of a self-reversed resonance line from Ba+ in a laser produced plasma from YBa2Cu307

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Anomalous profile of a self-reversed resonance line from Ba+ in a laser produced plasma from YBa2Cu307

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dc.contributor.author Riju C, Issac
dc.contributor.author Harilal, S S
dc.contributor.author Bindhu, C V
dc.contributor.author Geetha K, Varier
dc.contributor.author Nampoori, V P N
dc.contributor.author Vallabhan, C P G
dc.date.accessioned 2011-12-02T09:49:47Z
dc.date.available 2011-12-02T09:49:47Z
dc.date.issued 1997
dc.identifier.issn 0584-8547
dc.identifier.other Spectrochimica Acta Part B 52 (1997) 1791-1799
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/2592
dc.description.abstract A laser produced plasma from the multielement solid target YBa2Cu3O7 is generated using 1.06 μm, 9 ns pulses from a Q-switched Nd:YAG laser in air at atmospheric pressure. A time resolved analysis of the profile of the 4554.03 Å resonance line emission from Ba II at various laser power densities has been carried out. It has been found that the line has a profile which is strongly self-reversed. It is also observed that at laser power densities equal to or exceeding 1.6×1011 W cm−2, a third peak begins to develop at the centre of the self-reversed profile and this has been interpreted as due to the anisotropic resonance scattering (fluorescence). The number densities of singly ionized barium ions evaluated from the width of the resonance line as a function of time delay with respect to the beginning of the laser pulse give typical values of the order of 1019 cm−3. The higher ion concentrations existing at smaller time delays are seen to decrease rapidly. The Ba II ions in the ground state resonantly absorb the radiation and this absorption is maximum around 120 ns after the laser pulse. en_US
dc.description.sponsorship Cochin University of Science and Technology en_US
dc.language.iso en en_US
dc.publisher Elsevier en_US
dc.subject Laser produced plasma en_US
dc.subject Plasma spectroscopy en_US
dc.subject Time-resolved spectroscopy en_US
dc.subject Self-absorption en_US
dc.subject Self-reversal en_US
dc.subject Resonance fluorescence en_US
dc.subject Resonance scattering en_US
dc.title Anomalous profile of a self-reversed resonance line from Ba+ in a laser produced plasma from YBa2Cu307 en_US
dc.type Working Paper en_US
dc.contributor.faculty Technology en_US
dc.identifier.url http://www.sciencedirect.com/science/article/pii/S0584854797000712 en_US


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