Fluence Dependence (IMAGE) Forschungsverbund Berlin Caption Fluence dependence of the magnetic scattering signal for two different soft x-ray pulse durations. In the case of stimulated emission, which is responsible for a similar fluence-dependence at the Co 2p-to-valence transition, both curves are expected to coincide in this representation. Instead, the longer 120 fs pulses lead to significantly lower scattering. This is explained well by a model taking only ultrafast demagnetization induced by the soft x-ray beam itself into account (solid lines, shaded areas represent uncertainty of the model). Credit MBI Berlin Usage Restrictions The image may only be used with appropriate caption and credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.