Mass Measurements beyond the Major r-Process Waiting Point {sup 80}Zn

Journal Article · Wed Dec 31 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.101.262501· OSTI ID:21180077

Baruah, S; Herlert, A; Schweikhard, L ^[1]; Audi, G; Guenaut, C; Lunney, D ^[2]; Blaum, K; George, S ^[3]; Dworschak, M; Herfurth, F; Yazidjian, C ^[3]; Hager, U ^[4]; Kellerbauer, A ^[5]; Kluge, H -J ^[3]; Schatz, H ^[6]

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1. Institut fuer Physik, Ernst-Moritz-Arndt-Universitaet, 17487 Greifswald (Germany)
2. CSNSM-IN2P3-CNRS, Universite de Paris Sud, Orsay (France)
3. GSI, Planckstr. 1, 64291 Darmstadt (Germany)
4. Department of Physics, University of Jyvaeskylae, P.O. Box 35 (YFL), 40014 Jyvaeskylae (Finland)
5. Physics Department, CERN, 1211 Geneva 23 (Switzerland)
6. Department of Physics and Astronomy, NSCL, and JINA, Michigan State University, East Lansing, Michigan 48824 (United States)

High-precision mass measurements on neutron-rich zinc isotopes {sup 71m,72-81}Zn have been performed with the Penning trap mass spectrometer ISOLTRAP. For the first time, the mass of {sup 81}Zn has been experimentally determined. This makes {sup 80}Zn 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.

• OSTI ID: 21180077
• Journal Information: Physical Review Letters, Vol. 101, Issue 26; Other Information: DOI: 10.1103/PhysRevLett.101.262501; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASTROPHYSICS
CAPTURE
MASS
MASS SPECTROMETERS
NEUTRON REACTIONS
NEUTRON SEPARATION ENERGY
NEUTRON-RICH ISOTOPES
Q-VALUE
R PROCESS
ZINC 71
ZINC 72
ZINC 73
ZINC 74
ZINC 75
ZINC 76
ZINC 77
ZINC 78
ZINC 79
ZINC 80
ZINC 81