Measurement of the 92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

K Göbel ,E Casarejos ,O Kiselev ,N Kurz ,H Geißel ,M Winkler ,M Böhmer ,A R Junghans ,H Weick ,L Deveaux ,H Johansson ,T Berg ,F Aksouh ,C Nociforo ,S Walter ,T Aumann ,T Heftrich ,R C Lemmon ,D Cortina-Gil ,K Sonnabend ,T Nilsson ,M Labiche ,H Álvarez‐Pol ,A Klimkiewicz ,Nils Paar ,M Chartier ,M Elvers ,F Käppeler ,F Wamers ,W Waluś ,N Winckler ,B Fernández–Domínguez ,G Ickert ,M Weigand ,C Langer ,G Surówka ,P Adrich ,Kai Lindenberg ,K-H Behr ,L Schnorrenberger ,T Le Bleis ,J V Kratz ,Yu A Litvinov ,S Altstadt ,Th W Elze ,D Rossi ,M Hellstroem ,R Plag ,U Datta Pramanik ,R Beyer ,H Emling ,M Górska ,W Prokopowicz ,A Wagner ,K Boretzky ,R Kulessa ,A Movsesyan ,A Chatillon ,M Babilon ,M Erhard ,A Brünle ,Ershova Ershova,M Heil ,R Palit ,R Reifarth ,P Maierbeck ,K Sümmerer ,H Simon ,Dario Vretenar ,J Benlliure ,S Paschalis ,Sebastian Müller ,A Zilges

doi:10.1088/1742-6596/665/1/012034

Abstract

The Coulomb Dissociation (CD) cross sections of the stable isotopes 92,94,100Mo and of the unstable isotope 93Mo were measured at the LAND/R3B setup at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt, Germany. Experimental data on these isotopes may help to explain the problem of the underproduction of 92,94Mo and 96,98Ru in the models of p-process nucleosynthesis. The CD cross sections obtained for the stable Mo isotopes are in good agreement with experiments performed with real photons, thus validating the method of Coulomb Dissociation. The result for the reaction 93Mo(γ,n) is especially important since the corresponding cross section has not been measured before. A preliminary integral Coulomb Dissociation cross section of the 94Mo(γ,n) reaction is presented. Further analysis will complete the experimental database for the (γ,n) production chain of the p-isotopes of molybdenum.

Highlights

Background subtraction In addition toCoulomb excitation, the projectile may experience nuclear interactions in the target and reactions with the material outside of the target
The 92,93,94,100Mo(γ,n) reactions were measured via Coulomb Dissociation at the Large Area Neutron Detector (LAND)/R3B setup at GSI Helmholtzzentrum fur Schwerionenforschung in Darmstadt, Germany
The Coulomb Dissociation cross section σCD is determined by σCD =

Summary

Introduction

Background subtraction In addition toCoulomb excitation, the projectile may experience nuclear interactions in the target and reactions with the material outside of the target. In order to understand the abundance ratio of 94Mo to 92Mo, the determination of the cross section of the 94Mo(γ,n) reaction is necessary. The 92,93,94,100Mo(γ,n) reactions were measured via Coulomb Dissociation at the LAND/R3B setup at GSI Helmholtzzentrum fur Schwerionenforschung in Darmstadt, Germany.

Results

Conclusion