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Mass measurements near the r-process path using the Canadian Penning Trap mass spectrometer.
- Source :
-
Physical Review C: Nuclear Physics . Apr2012, Vol. 85 Issue 4, p1-14. 14p. - Publication Year :
- 2012
-
Abstract
- The masses of 40 neutron-rich nuclides from Z = 51 to 64 were measured at an average precision of δm/m = 10-7 using the Canadian Penning Trap mass spectrometer at Argonne National Laboratory. The measurements, of fission fragments from a 252Cf spontaneous fission source in a helium gas catcher, approach the predicted path of the astrophysical r process. Where overlap exists, this data set is largely consistent with previous measurements from Penning traps, storage rings, and reaction energetics, but large systematic deviations are apparent in β-endpoint measurements. Differences in mass excess from the 2003 Atomic Mass Evaluation of up to 400 keV are seen, as well as systematic disagreement with various mass models. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 05562813
- Volume :
- 85
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Physical Review C: Nuclear Physics
- Publication Type :
- Academic Journal
- Accession number :
- 77253271
- Full Text :
- https://doi.org/10.1103/PhysRevC.85.045805