I found three transition lines of magnesium fluoride during LIBS process at 0.5 mm axial distance. Can any one tell me which elements are presents in these transition lines? Screenshot of graph is attached here.
I would suggest the 610nm and 670nm peaks are from Lithium impurities. [See https://physics.nist.gov/cgi-bin/ASD/lines1.pl?composition=Li%3A100&mytext%5B%5D=Li&myperc%5B%5D=100&spectra=Li0-2&low_wl=500&upp_wl=700&show_av=2&unit=1&resolution=1000&temp=1&eden=1e17&libs=1]
Do you have a frequency doubled [greed] Nd:YAG laser in your system? If so, this could explain the 532nm peak.
As already mentioned, the lines at 670 nm and 610 nm are most probably due to lithium impurity in your sample. Whereas, the 532 line is very well known second harmonic of a Nd:YAG laser.
May I ask what kind of laser you are using in your experiment and what is the sample made of? Is it a solid MgF window?
If you search literature, I reported the LIBS on the LiF sample that was published a few years ago in Physics of Plasma Journal.
If your sample is MgF, you must detect the resonance line of Mg at 285 nm.
If your sample is MgF then you must see a triplet structure around 518, 517,516 nm. The spectrum you have uploaded doesn't contain these lines. Please check your sample again. These three lines are the finger print of Mg.
Thanks for acknowledging my response. I am still puzzled, your LIBS data looks like generated from LiF rather than from MgF that is why the lithium atomic lines are present. You will not identify any fluorine lines as they lie in the UV region.
I checked my data that I got from a MgF sample. It shows clearly the Mg triplet around 518 nm and a few other lines along with the resonance line of Mg at 285nm. I suggest you check your sample again. If you need ny help, just let me know.