Filters
Results 1 - 10 of 14
Results 1 - 10 of 14.
Search took: 0.029 seconds
| Sort by: date | relevance |
[en] The present investigation involves improved measurements of the Qsub(β)-values of 75-78Zn and determinations of the total decay energies of sup(79,80)Zn which are not reported in the literature before. Also 81Zn was detected but at the time for the experiment the ion-source was not efficient enough to yield sufficient activity for an accurate Qsub(β)-determination. (orig./HSI)
Source
Klepper, O. (ed.); Gesellschaft fuer Schwerionenforschung m.b.H., Darmstadt (Germany, F.R.); Technische Hochschule Darmstadt. Schriftenreihe Wissenschaft und Technik; v. 26; 756 p; ISBN 3-88607-036-0; 
; 1984; p. 102-111; 7. international conference on atomic masses and fundamental constants (AMCO-7); Seeheim-Jugenheim (Germany, F.R.); 3-7 Sep 1984
; 1984; p. 102-111; 7. international conference on atomic masses and fundamental constants (AMCO-7); Seeheim-Jugenheim (Germany, F.R.); 3-7 Sep 1984
[en] Single-neutron states in the Z=30, N=49 isotope "7"9Zn have been populated using the "7"8Zn(d, p)"7"9Zn transfer reaction at REX-ISOLDE, CERN. The experimental setup allowed the combined detection of protons ejected in the reaction, and of γ rays emitted by "7"9Zn. The analysis reveals that the lowest excited states populated in the reaction lie at approximately 1 MeV of excitation, and involve neutron orbits above the N=50 shell gap. From the analysis of γ-ray data and of proton angular distributions, characteristic of the amount of angular momentum transferred, a 5/2"+ configuration was assigned to a state at 983 keV. Comparison with large-scale-shell-model calculations supports a robust neutron N=50 shell-closure for "7"8Ni. These data constitute an important step towards the understanding of the magicity of "7"8Ni and of the structure of nuclei in the region
Journal
[en] The β-decay properties of neutron-rich fission fragments of Cu, Zn, and Ga isotopes were studied at the Holifield Radioactive Ion Beam Facility. Beams of 75-79Cu, 79-81Zn, and 83-85Ga were formed and delivered to two new end-stations at the facility. The Low-energy Radioactive Ion Beam Spectroscopy Station is a traditional on-line low energy (200 keV) beam line with 4 clover Ge detectors, two half-cylindrical plastic β-detectors, and a moving tape collector. In addition, many of the beams were accelerated to above 2 MeV/u and delivered to a micro-channel plate and transmission ion chamber located just in front of the same detector setup. In both cases, fine adjustment of an isobar separator was used to enhance the isotope of interest. Excited levels in the daughters and β-delayed neutron branching ratios were measured and used to confirm isotope identification. The decays from 79Cu and 85Ga were observed for the first time as was the 84Ge 2+1 level populated by β and βn decay channels. (author)
Journal
Acta Physica Polonica. Series B; ISSN 0587-4254; ; v. B40(3); p. 447-455
; v. B40(3); p. 447-455
[en] High-precision mass measurements on neutron-rich zinc isotopes 71m,72-81Zn have been performed with the Penning trap mass spectrometer ISOLTRAP. For the first time, the mass of 81Zn has been experimentally determined. This makes 80Zn the first of the few major waiting points along the path of the astrophysical rapid neutron-capture process where neutron-separation energy and neutron-capture Q-value are determined experimentally. The astrophysical conditions required for this waiting point and its associated abundance signatures to occur in r-process models can now be mapped precisely. The measurements also confirm the robustness of the N=50 shell closure for Z=30
Journal
No abstract available
Journal
Verhandlungen der Deutschen Physikalischen Gesellschaft; ISSN 0420-0195; ; CODEN VDPEAZ; v. 41(3); [1 p.]
; CODEN VDPEAZ; v. 41(3); [1 p.]
| 1 | 2 | Next |