Direkte Massen-Messungen exotischer Kerne am ESR der GSI Wissenschaftlicher Bericht

SIGLEAvailable from TIB Hannover: DtF QN1(53,6) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Hochenergetische Schwerionen zur Untersuchung duenner Schichten mit der ERDA Methode Wissenschaftlicher Bericht

Available from TIB Hannover: DtF QN1(53,9) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman

Direct mass measurements of A = 80 isobars

Direct mass measurements of A=80 isobars were performed using the second cyclotron of SARA (Système Accéléra teur Rhône-Alpes) of the ISN (Institut des Sciences Nucléaires) in Grenoble as a time-of-flight mass spectrometer. Using the $300$ MeV $^{58}$Ni$^{27}$Al reaction, the isobars $^{80}$Rb, $^{80}$Sr, $^{80}$Y, and $^{80}$Zr (only one event!) were measured. For $^{80}$Y we found a mass value of $79.934320(180)$ u, corresponding to a decay energy Q ($^{80}$Y $\rightarrow$ $^{80}$Sr) of $(9120 \pm 170)$ keV. Comparing this value to the former experiments of Lister et al. and Della Negra et al. results in a difference of about $2.2$ MeV. However, it does agree with the recommended value of Audi and Wapstra, which is derived from systematic trends. For $^{80}$Zr the single event was identified with a probability of $0.999975$ and a mass value of $79.940400(1600)$ u could be deduced from our experiment