Mass measurement in the fp-shell using the TOFI spectrometer

被引：13

作者：

Bai, Y ^{[1
]}

Vieira, DJ ^{[1
]}

Seifert, HL ^{[1
]}

Wouters, JM ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

ENAM 98: EXOTIC NUCLEI AND ATOMIC MASSES | 1998年 / 455卷

关键词：

D O I：

10.1063/1.57312

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The masses of 48 neutron-rich nuclei extending from Sc-55 to Cu-75 have been determined from the final set of data to be acquired with the time-of-flight-isochronous (TOFI) spectrometer. The masses of eight isotopes (Fe-68, Co-70,Co-71, Ni-73, and Cu72-75) are reported for the first time. The resulting masses now tie in neatly with the masses of previously measured neutron-rich Zn and Ga isotopes determined from fission product beta-endpoint measurements. A careful evaluation of the calibration sensitivity is made with respect to inclusion or exclusion of these heavy known species and excellent calibration stability is found. Contrasting these results with previous TOFI measurements, we find that these new results fall between the results of Tu et al.(1) which trend to slightly less bound masses as one proceeds to the most neutron-rich species and Seifert et al.(2) which shows the opposite trend. Good agreement with the predictions of several mass models and Audi-Wapstra systematics are found.

引用

页码：90 / 93

页数：4