2-5 Data Analysis of the Schottky Mass Measurements of 152Sm Fragments

作     者：Yan Xinliang K.Blaum Yu.A.Litvinov F.Bosch C.Brandau Chen Lixin H.Geissel R.Knobel C.Kozhuharov J.Kurcewicz S.A.Litvinov G.Munzenberg C.Nociforo F.Nolden W.R.Pla M.S.Sanjari C.Scheidenberger M.Steck Sun Baohua Tu Xiaolin Wang Meng H.Weick N.Winckler M.Winkler Xu Hushan Zhang Yuhu Zhou Xiaohong 

作者机构：不详 

出 版 物：《IMP & HIRFL Annual Report》 (中国科学院近代物理研究所和兰州重离子研究装置年报（英文版）)

年 卷 期：2014年第1期

页      面：35-36页

学科分类：07[理学] 0702[理学-物理学] 

主　　题：Schottky Mass Measurements 

摘      要：Precision mass measurements of neutron-deficient 152Sm projectile fragments were conducted in 2005 at theFRS-ESR facility at GSI Helmholtz centre[1, 2], employing the time-resolved Schottky Mass Spectrometry[3]. A newmass evaluation method has been developed in the data analysis. The systematic error in the mass determinationwas significantly reduced with the new method[4].Exotic nuclei, produced by projectile fragmentation of a 615 AMeV 152Sm primary beam in a 4.009 g/cm2beryllium target, were transmitted and B-separated by the fragment separator FRS and then injected and storedin the experimental storage ring ESR. In ESR the electron-cooling process was continuously applied to the storedions. To first order approximation, the revolution-frequencies (f) of the stored ions in the ESR are related to theirvelocities (v) and mass-to-charge ratios (m=q) of the ions in rest frame: