PyDDM.ISF_and_DDMmatrix_theoretical_models.dTheoryDoubleExp_OneNonerg_ISF

PyDDM.ISF_and_DDMmatrix_theoretical_models.dTheoryDoubleExp_OneNonerg_ISF#

dTheoryDoubleExp_OneNonerg_ISF(lagtime, f, tau1, s1, C, tau2, s2)#

Theoretical model with an exponential term for the intermediate scatting function.

Parameters:

  • lagtime (array) – 1D array of the lagtimes

  • f (float) – Fraction with relaxation time tau1 (part of non-ergodic)

  • tau1 (float) – The characteristic decay time

  • s1 (float) – Stretching exponent

  • C (float) – The non-ergodicity parameter

Returns:

ddm_matrix – DDM matrix as shown in equation below

Return type:

array

Contents