Nuclear Forward Scattering of Synchrotron Radiation by 99Ru

Dimitrios Bessas (1) , D. G. Merkel (1) , A.I. Chumakov (1) , R. Rueffer (1) , Raphaël P. Hermann (2, 3) , Ilya Sergueev (1) , Abdelfattah Mahmoud (2) , B. Klobes (2) , Michael A. Mcguire (2) , Moulay Tahar Sougrati (4, 5) , Lorenzo Stievano (5, 4)

1 ESRF - European Synchrotron Radiation Facility
2 JCNS - PGI, JARA-FIT - Jülich Centre for Neutron Science
3 Faculté des Sciences
4 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
5 RS2E - Réseau sur le stockage électrochimique de l'énergie

We measured nuclear forward scattering spectra utilizing the Ru99 transition, 89.571(3) keV, with a notably mixed E2/M1 multipolarity. The extension of the standard evaluation routines to include mixed multipolarity allows us to extract electric and magnetic hyperfine interactions from Ru99-containing compounds. This paves the way for several other high-energy Mössbauer transitions, E∼90  keV. The high energy of such transitions allows for operando nuclear forward scattering studies in real devices.

Domaines: Matériaux

Dimitrios Bessas, D. G. Merkel, A.I. Chumakov, R. Rueffer, Raphaël P. Hermann, et al.. Nuclear Forward Scattering of Synchrotron Radiation by 99Ru. Physical Review Letters, 2014, 113, pp.147601. ⟨10.1103/PhysRevLett.113.147601⟩. ⟨hal-01091244⟩