Nuclear magnetic resonance relaxometry method for determining the longitudinal relaxation behaviour of nuclear spins of a sample, having the following steps: - exposing a sample to a static polarization magnetic field for saturation polarization of the nuclear spins, wherein the polarization magnetic field has a polarization field strength and a specified polarization magnetic field direction, such that the magnetization of the nuclear spins points in the z-direction; - changing the polarization field strength to an evolution field strength by exposing the sample to a static evolution magnetic field, wherein the change in the polarization field strength to the evolution field strength is effected non-adiabatically, wherein the sample is exposed to the evolution field strength over a specified evolution time period, wherein the evolution magnetic field has a specified evolution magnetic field direction, wherein the evolution field strength is lower than the polarization field strengths, - exposing the sample to a static detection magnetic field and measuring the z-component of the magnetization of the nuclear spins in the detection magnetic field, wherein the detection magnetic field has a detection field strength and a specified detection magnetic field direction, wherein the detection field strength is greater than the evolution field strength, wherein the measurement of the magnetization of the nuclear spins is effected by way of a readout pulse sequence, - repeating the preceding steps for different evolution time periods and determining the longitudinal relaxation behaviour of the nuclear spins from the measured z-component of the magnetization in dependence on the duration of the respective different evolution time periods, characterized in that the evolution magnetic field direction differs from the polarization magnetic field direction, wherein the evolution field strength is also determined from the measured z-component of the magnetization in dependence on the respective duration of the different evolution time periods, wherein the measured z-component of the magnetization in dependence on the respective duration of the different evolution time periods describes a damped oscillation curve (202; 300; 400), wherein determining the evolution field strength comprises determining the oscillation frequency of the oscillation curve (202; 300; 400). - exposing a sample to a static polarization magnetic field for saturation polarization of the nuclear spins, wherein the polarization magnetic field has a polarization field strength and a specified polarization magnetic field direction, such that the magnetization of the nuclear spins points in the z-direction; - changing the polarization field strength to an evolution field strength by exposing the sample to a static evolution magnetic field, wherein the change in the polarization field strength to the evolution field strength is effected non-adiabatically, wherein the sample is exposed to the evolution field strength over a specified evolution time period, wherein the evolution magnetic field has a specified evolution magnetic field direction, wherein the evolution field strength is lower than the polarization field strengths, - exposing the sample to a static detection magnetic field and measuring the z-component of the magnetization of the nuclear spins in the detection magnetic field, wherein the detection magnetic field has a detection field strength and a specified detection magnetic field direction, wherein the detection field strength is greater than the evolution field strength, wherein the measurement of the magnetization of the nuclear spins is effected by way of a readout pulse sequence, - repeating the preceding steps for different evolution time periods and determining the longitudinal relaxation behaviour of the nuclear spins from the measured z-component of the magnetization in dependence on the duration of the respective different evolution time periods,