Change of 113 peak profile during the LIESST process of the LS-dis phase. (a) Selected q-scans after different irradiation times and temperature. (b) FWHM and peak separation as a function of the LIESST process. At t = 0 the irradiation was switched on and kept constant for 65 min (vertical line 4, q-scan 4). From t = 65 to t = 245 min the sample temperature remained constant and was then heated to 55 K where the spin transition to the LS state occurred.