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						<h1 itemprop="headline">AMO Seminar - Michael V. DePalatis: Th3+ Ion Trapping and Production of Cold Molecular Ions</h1>
						
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														Tuesday 27  August 2013,
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														&nbsp;at 10:15 -  11:00
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														<span itemprop="name">Grete Flarup</span>
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									<p><strong>Speaker</strong>: Michael V. DePalatis
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<p><strong>Title</strong>: Th<sup>3+</sup> Ion Trapping and Production of Cold Molecular Ions
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<p><strong>Abstr<img class="t3-TCEforms-reqImg" name="req_tt_news_103125_bodytext" src="clear.gif" alt>act</strong>:
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<p>Frequency metrology using trapped ions has provided some of the most precise tests of fundamental physics to date. <sup>229</sup>Th has a uniquely low-lying nuclear transition of only a few eV which could be exploited to extend this precision even further. Th<sup>3+</sup> ions prove to be an ideal platform for accessing this nuclear state as well as for testing modern atomic physics <em>ab initio</em> computational methods. Here I will describe some of the many challenges involved in working with trapped Th<sup>3+</sup> ions and some experiments performed with them.
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<p>A second topic involves the production of sympathetically cooled barium monohalide ions, BaX<sup>+</sup> (X = F, Cl, Br). This class of molecular ions proves to be particularly promising for cooling to the rovibrational ground state. Our method of producing BaX<sup>+</sup> ions involves reactions between cold, trapped Ba<sup>+</sup> ions and neutral gas phase reactants at room temperature. Here I will present experiments to characterize these reactions for producing Coulomb crystals composed of laser cooled Ba<sup>+</sup> ions and sympathetically cooled BaX<sup>+</sup> ions.
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<p><em>Coffee, tea and breadrolls will be served at 10</em>.<br><br>Aurelien Dantan</p>
								
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