[Ifeffit] Question about rare noise in Pb spectra at high k

Dear all, I measured Na2Ti3O7 with Pb replacing Na. I measured the L3 edge in transmission mode. Mainly all samples have noise at k>8 but two of them show the "same noise". Pb0375 replaces 18% of Na by Pb while Pb1000 replaces 50%. I would like to know if this is a signal to pay attention or just cut it off. I am planning to measure at low temperatures in the next call. Any suggestion is welcome. I also attach the csv of the samples and PbO2 std. Best regards. [image: image.png] (^ㅇᆽㅇ^)(=˃ᆺ˂=)(=🝦 ༝ 🝦=) Eugenio H. OTAL Assistant Professor Research Initiative for Supra Materials, Shinshu University 4-17-1 Wakasato, Nagano city. 380-8553, Japan eugenio_otal@shinshu-u.ac.jp ¯\_(ツ)_/¯ ¯\_(ツ)_/¯ Who is John Galt? ¯\_(ツ)_/¯ ¯\_(ツ)_/¯