prelab2 - ↓ GPIB The signal from the photomultiplier is...

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Karen Horovitz 17 September 2009 CHM 231 Expt 2: Flash Lamps Flash lamps are used in order to excite samples with light, and a computer will detect the signal from scattered light. In the future, this will be used in order to measure the phosphorescence lifetime of molecules excited to the triplet state. In figure 1, the equipment used is shown. In this lab, different experimental settings will be changed in order to see their effects on the signal. The parameters include power supply voltage, resistance box, scope gain, and flash lamp rate. Fig. 1: Flash Lamp signal Power Supply
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Unformatted text preview: ↓ GPIB The signal from the photomultiplier is monitored with a digital oscillosope and transferred to the computer. In this experiment, there will be no sample; rather, the instrument response will be tested. After changing the parameters, data will be gathered and fitted to an Sample Housing Photomultipli er Tube Digital Scope compute r exponential using the Excel solver after it is inverted. Further detailed excel analysis will be done using the LINEST function and a linear regression. This analysis will be done on each of the 12 experiments and then compared....
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prelab2 - ↓ GPIB The signal from the photomultiplier is...

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