期刊
PHYSICAL REVIEW LETTERS
卷 120, 期 26, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.262702
关键词
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资金
- U.S. Department of Energy, Office of Nuclear Physics [DE-AC02-06CH11357, PHY-1419765]
- NSERC (Canada) [SAPPJ-2015-00034 (CPI 1199136)]
- U.S. Department of Energy [DE-AC52-07NA27344, DE-SC0013039, DE-FG02-02ER41216]
- National Science Foundation [PHY-1430152]
- National Nuclear Security Administration of the U.S. Department of Energy at Los Alamos National Laboratory [DE-AC52-06NA25396]
The Canadian Penning Trap mass spectrometer at the Californium Rare Isotope Breeder Upgrade (CARIBU) facility was used to measure the masses of eight neutron-rich isotopes of Nd and Sm. These measurements are the first to push into the region of nuclear masses relevant to the formation of the rare-earth abundance peak at A similar to 165 by the rapid neutron-capture process. We compare our results with theoretical predictions obtained from reverse engineering the mass surface that best reproduces the observed solar abundances in this region through a Markov chain Monte Carlo technique. Our measured masses are consistent with the reverse-engineering predictions for a neutron star merger wind scenario.
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