Determination of absolute cross sections for cluster-specific decays. (5th May 2016)

• Record Type: Journal Article
• Authors: Hans, Andreas; Knie, André; Förstel, Marko; Schmidt, Philipp; Reiß, Philipp; Ozga, Christian; Hergenhahn, Uwe; Ehresmann, Arno
• Is Part Of: Journal of physics. Volume 49:Number 10(2016:May 15)
• Publication Date: 2016-05-05
• Subjects: clusters -- cross sections -- fluorescence -- ICD; 3250 + d -- 3640Sx; Atoms -- Periodicals; Molecules -- Periodicals; Optics -- Periodicals; Nuclear physics -- Periodicals; 539.6
• DOI: 10.1088/0953-4075/49/10/105101
• Languages: English
• ISSNs: 0953-4075

Abstract

Abstract: Fluorescence spectrometry is used to determine absolute cross sections of cluster-specific decay processes following photon excitation. Absolute values for selected processes in partially condensed supersonic jets are determined using atomic benchmarks. This method is applicable to a wide variety of processes in clusters in which a photon is emitted. In a proof-of-principle experiment, absolute cross sections of processes in two prototype systems were measured: (I) inner-valence excitation and ionization of Ar clusters and (II) resonant interatomic Coulombic decay (rICD) in Ne clusters. Example II is the first measurement of absolute cross sections of ICD whatsoever.