Mass measurement in the fp-shell using the TOFI spectrometer
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
The masses of 48 neutron-rich nuclei extending from {sup 55}Sc to {sup 75}Cu 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 ({sup 68}Fe, {sup 70,71}Co, {sup 73}Ni, and {sup 72-75}Cu) 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.
- OSTI ID:
- 21207891
- Journal Information:
- AIP Conference Proceedings, Vol. 455, Issue 1; Conference: ENAM 98: 2. international conference on exotic nuclei and atomic masses, Bellaire, MI (United States), 23-27 Jun 1998; Other Information: DOI: 10.1063/1.57312; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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