Direct mass measurement of bare short-lived V-44, Mn-48, Ti-41 and Cr-45 ions with isochronous mass spectrometry

摘要

We present direct mass measurements of the short-lived V-44, Mn-48, Ti-41 and Cr-45 nuclei. A novel experimental method has been used that is based on projectile fragmentation, in-flight separation of relativistic heavy ions with the fragment separator (FRS). and on isochronous operation of the experimental storage ring (ESR). A mass resolving power of I 10 000 (FWHM) and an accuracy of about (100-500) keV has been achieved. The impact of the present results on the rp-process in X-ray burst models is discussed. (C) 2004 Elsevier B.V. All rights reserved.