RelativeResourceManager(7)

RelativeResourceManager(7) - Optical atomic spectrometry...

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Optical atomic spectrometry Chem 420 September 17, 2008
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Problem set #1 z Pickup after class by alphabetical order z Group 1: A-J z Group 2: K-O z Group 3: P-Z z Average=73.1 z Key is available on-line z Grading issues must be contested in writing to Callie ( crousho1@illinois.edu ) within one week. You must provide your assignment by set next week Wednesday’s class.
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For PS#2—coming soon z Look for PS guideline to be posted on Compass for subsequent assignments. z Assignments are due at beginning of class—starts at 12 Noon! z For full credit assignments must be in box when the lecture begins. z Any assignment turned in between noon and 12:05 PM will automatically be deducted 5 points. z Assignments will NOT be accepted for credit after 12:05 PM. Score = 0
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Recap from last class z Slits—what are they good for? How do they work? z Advantages of time domain measurements z Throughput (Jaquinot) z Wavelength (Connes) z Multiplex (Fellgett) z What are the classes of photodetectors? z Photon transducers z Single channel: Photovoltaic cell, vacuum tube, PMT, photodiodes z Multichannel: Diode arrays, CCDs, CMOS z Thermal transducers z PMTs—How do they work? z What’s the difference between a CCD and CMOS array?
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Questions???
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Atomic energy level diagrams z As the number of outer shell electrons increases, the energy level diagrams become very complex. z Correlating atomic spectra with energy level diagrams is difficult for heavier elements. z Do not observe spin forbidden s Æ s, p Æ p, or d Æ d transitions 2340 792 201 182 147 294 124 170 106 # of lines Fe Cr Ba Ca Mg Ru K Na Li Element Sodium lines at ~590 nm
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Optical atomic spectroscopy z Atomic emission spectroscopy (AE) z Heat of a flame, plasma, electric arc or spark excited electron to higher orbitals.
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RelativeResourceManager(7) - Optical atomic spectrometry...

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