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Title: Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation

Abstract

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.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1467432
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 120; Journal Issue: 26; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Orford, R., Vassh, N., Clark, J. A., McLaughlin, G. C., Mumpower, M. R., Savard, G., Surman, R., Aprahamian, A., Buchinger, F., Burkey, M. T., Gorelov, D. A., Hirsh, T. Y., Klimes, J. W., Morgan, G. E., Nystrom, A., and Sharma, K. S. Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation. United States: N. p., 2018. Web. doi:10.1103/PhysRevLett.120.262702.
Orford, R., Vassh, N., Clark, J. A., McLaughlin, G. C., Mumpower, M. R., Savard, G., Surman, R., Aprahamian, A., Buchinger, F., Burkey, M. T., Gorelov, D. A., Hirsh, T. Y., Klimes, J. W., Morgan, G. E., Nystrom, A., & Sharma, K. S. Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation. United States. doi:10.1103/PhysRevLett.120.262702.
Orford, R., Vassh, N., Clark, J. A., McLaughlin, G. C., Mumpower, M. R., Savard, G., Surman, R., Aprahamian, A., Buchinger, F., Burkey, M. T., Gorelov, D. A., Hirsh, T. Y., Klimes, J. W., Morgan, G. E., Nystrom, A., and Sharma, K. S. Fri . "Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation". United States. doi:10.1103/PhysRevLett.120.262702.
@article{osti_1467432,
title = {Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation},
author = {Orford, R. and Vassh, N. and Clark, J. A. and McLaughlin, G. C. and Mumpower, M. R. and Savard, G. and Surman, R. and Aprahamian, A. and Buchinger, F. and Burkey, M. T. and Gorelov, D. A. and Hirsh, T. Y. and Klimes, J. W. and Morgan, G. E. and Nystrom, A. and Sharma, K. S.},
abstractNote = {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.},
doi = {10.1103/PhysRevLett.120.262702},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 26,
volume = 120,
place = {United States},
year = {2018},
month = {6}
}

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