coding
coding


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warren "Hmm. So I'm wondering if part of the fit problem is because we're simply comparing intensity at the 14 points and 13 troughs. Take this example: ..." | Read more » almost 9 years ago
warren "Cool, thanks! I was mainly looking for a citation for the most common forms of Hg, and/or a clear reference for which is found in CFL bulbs. But aw..." | Read more » almost 9 years ago
gretchengehrke "I'm happy to post my dissertation, but it has nothing to do with this (it explores natural Hg isotopic composition and fractionation in the marine ..." | Read more » almost 9 years ago
warren "I'm going to revise: 211px and 742px, out of a total of 1390px. " | Read more » almost 9 years ago
warren "Oops, meant to share links to my tests -- here's the one I used the new calibration system on, and listed 3 approximate errors for: https://spectra..." | Read more » almost 9 years ago
warren "Hmm. I guess there are pros and cons to each approach. I agree that the 546 line doesn't result in a great linear calibration -- some end up about..." | Read more » almost 9 years ago
cfastie "If the original Snowy Sky CFL is calibrated by pinning down the 436 nm and 546 nm peaks (using a macro) it looks like this: Most of the peaks do..." | Read more » almost 9 years ago
warren "OK - I'm adapting the calibration slider to use the photoshop-corrected version of the Snow Sky spectrum. I read the blue 436 peak at 210px from l..." | Read more » almost 9 years ago
warren "Would you be willing to try a recalibration using the 436/546 lines as a starting point? Would that be useful as a point of comparison? Also - I b..." | Read more » almost 9 years ago
cfastie "That's a very important observation. Had I originally calibrated this spectrum on the 436 line and the 611 line (instead of 405 and 650), all the o..." | Read more » almost 9 years ago
warren "If it's helpful, we can probably ask some of the OTK beta participants for one, since a couple have access to lab spectrometers. In your image/ima..." | Read more » almost 9 years ago
warren "Oh, cool -- can you link us to your dissertation, as a source? I'm hoping this note can be a sort of bibliography for the calibration code decision..." | Read more » almost 9 years ago
gretchengehrke "Ah, it makes sense why Hg(0) won't have a fluorescence line on compound fluorescent bulbs though: the liquid Hg(0) in the tube needs to be ionized ..." | Read more » almost 9 years ago
gretchengehrke "I am absolutely positive that the most common forms of Hg are Hg(0) and Hg(II) -- my whole PhD is on mercury, specifically on Hg isotopes. The onl..." | Read more » almost 9 years ago
cfastie "Hi Gwill, there do seem to be a lot of terbium peaks. I have not yet figured out how to know which of those peaks are expected in the light from a ..." | Read more » almost 9 years ago
warren "Thanks, Gwill -- good resource. Chris, I wanted to get some more clarity from @gretchengehrke on the mercury oxidation states in the comments of m..." | Read more » almost 9 years ago
warren "Hmm, is there a reason Hg (0) is not listed in the NIST spectra? Perhaps Hg (0) does not have any intense peaks? My list is filtered for most inten..." | Read more » almost 9 years ago
Guillaume123 "Chris, Have you ever looked at "The Elements Spectra"; it gives you numerical values of the peaks, you can get it from: www.infini-t.com or email..." | Read more » almost 9 years ago
warren "Don't we have an ocean optics spectrum to source from too? I don't remember if we took a cfl spectrum with it, but we could maybe ask Mary to take ..." | Read more » almost 9 years ago
gretchengehrke "Oh, and clarification for my comment above: oxidation states are simply different common ions. Hg (0) is neutral, Hg (II) is short two electrons,..." | Read more » almost 9 years ago
gretchengehrke "Hg (II), Hg (I), and Hg (0) are oxidation states of mercury. Hg (II) and Hg (0) are by far the most common forms of Hg in the environment -- Hg (I..." | Read more » almost 9 years ago
cfastie "Now there is a new set of references. A newly corrected image (background) of the diffraction pattern of Snowy Sky CFL with emission lines shifte..." | Read more » almost 9 years ago
cfastie "Correcting the diffraction pattern was done this way: marquee select lines and translate them left and right? This was done in the Photoshop file..." | Read more » almost 9 years ago
warren "I see that the 14 peaks you've chosen are sourced from the NIST data, not the Wikipedia/Ocean Optics data. OK, one last issue -- for intensities o..." | Read more » almost 9 years ago