Table 4.

Values of the parameters obtained when fitting at the same time 11 Q values, from 0.33 to 0.96 Å−1.

	f	p fast	p slow	p CH2	DTfast	DRfast	τ fast	DTslow	DRslow	τ slow	Γ CH2
RH	0.040 ± 0.002	0.736 ± 0.002	0.123 ± 0.002	0.100 ± 0.002	2.5 ± 0.1	2.3 ± 0.2	1.8 ± 0.1	0.20 ± 0.02	1.10 ± 0.05	6.7 ± 0.3	0.39 ± 0.02
LH	0.062 ± 0.003	0.715 ± 0.003	0.135 ± 0.003	0.088 ± 0.003	2.3 ± 0.2	2.3 ± 0.3	1.8 ± 0.5	0.16 ± 0.03	0.40 ± 0.03	9.7 ± 0.3	0.33 ± 0.05
Bulk water*					2.5	2.3	0.9
Bulk water**					2.3		1.1

f is the fraction of immobile protons; p_fast, p_slow and p_CH2 are respectively the fraction of free water population, of restricted water population and of protons not attributed to water. D_Tfast/slow, D_Rfast/slow and τ_fast/slow are the translational and rotational diffusion coefficients and residence times of free water (fast) and restricted water (slow). Γ_CH2 is the line-width of the S_CH2 (Q, ω) contribution. Units for D_Tfast, D_Tslow, D_Rfast, and D_Rslow are expressed in [10⁻⁵ cm²/s], while τ_fast and τ_low are expressed in [ps] and Γ_CH2 in [meV]. * = Diffusion coefficient of bulk water determined experimentally from a scan of pure water measured at 300 K on IN5 at the same energy resolution. ** = Diffusion coefficient of bulk water found in literature^42,47 for T = 298 K. The associated errors were estimated using the Minuit minimization algorithm and the Minuit processor MINOS⁶⁰.