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 ~ 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.
Orford, Rodney, et al. "Precision mass measurements of neutron-rich neodymium and samarium isotopes and their role in understanding rare-earth peak formation." Physical Review Letters, vol. 120, no. 26, Mar. 2018. https://doi.org/10.1103/PhysRevLett.120.262702
Orford, Rodney, Mumpower, Matthew Ryan, Vassh, Nicole, Surman, Rebecca, Clark, Jason, Savard, Guy, Aprahamian, Ani, Burkey, M. T., Gorelov, D. A., Buchinger, F., Hirsh, T. Y., Klimes, J. W., Morgan, G. E., Nystrom, Andrew, & Sharma, K. S. (2018). Precision mass measurements of neutron-rich neodymium and samarium isotopes and their role in understanding rare-earth peak formation. Physical Review Letters, 120(26). https://doi.org/10.1103/PhysRevLett.120.262702
Orford, Rodney, Mumpower, Matthew Ryan, Vassh, Nicole, et al., "Precision mass measurements of neutron-rich neodymium and samarium isotopes and their role in understanding rare-earth peak formation," Physical Review Letters 120, no. 26 (2018), https://doi.org/10.1103/PhysRevLett.120.262702
@article{osti_1726163,
author = {Orford, Rodney and Mumpower, Matthew Ryan and Vassh, Nicole and Surman, Rebecca and Clark, Jason and Savard, Guy and Aprahamian, Ani and Burkey, M. T. and Gorelov, D. A. and Buchinger, F. and others},
title = {Precision mass measurements of neutron-rich neodymium and samarium isotopes and their role in understanding rare-earth peak formation},
annote = {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 ~ 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},
url = {https://www.osti.gov/biblio/1726163},
journal = {Physical Review Letters},
issn = {ISSN 0031-9007},
number = {26},
volume = {120},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2018},
month = {03}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 337, Issue 1https://doi.org/10.1016/0168-9002(93)91142-A
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 266, Issue 19-20https://doi.org/10.1016/j.nimb.2008.05.091