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Precision mass measurements beyond 132Sn: anomalous behavior of odd-even staggering of binding energies.
- Source :
-
Physical review letters [Phys Rev Lett] 2012 Jul 20; Vol. 109 (3), pp. 032501. Date of Electronic Publication: 2012 Jul 16. - Publication Year :
- 2012
-
Abstract
- Atomic masses of the neutron-rich isotopes (121-128)Cd, (129,131)In, (130-135)Sn, (131-136)Sb, and (132-140)Te have been measured with high precision (10 ppb) using the Penning-trap mass spectrometer JYFLTRAP. Among these, the masses of four r-process nuclei (135)Sn, (136)Sb, and (139,140)Te were measured for the first time. An empirical neutron pairing gap expressed as the odd-even staggering of isotopic masses shows a strong quenching across N = 82 for Sn, with a Z dependence that is unexplainable by the current theoretical models.
Details
- Language :
- English
- ISSN :
- 1079-7114
- Volume :
- 109
- Issue :
- 3
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 22861839
- Full Text :
- https://doi.org/10.1103/PhysRevLett.109.032501