6533b852fe1ef96bd12ab4e9
RESEARCH PRODUCT
Precision Mass Measurements beyondSn132: Anomalous Behavior of Odd-Even Staggering of Binding Energies
Heikki PenttiläTommi EronenAri JokinenMarkus KortelainenAntti SaastamoinenIain MooreAnu KankainenSami Rinta-antilaVeli KolhinenJuha ÄYstöDmitry GorelovJuho RissanenVolker SonnenscheinJani HakalaJacek Dobaczewskisubject
QuenchingPhysicsIsotopePairingBinding energyTheoretical modelsGeneral Physics and AstronomyNeutronPhysics::Atomic PhysicsAtomic physicsNuclear ExperimentMass spectrometryAtomic massdescription
Atomic masses of the neutron-rich isotopes $^{121--128}\mathrm{Cd}$, $^{129,131}\mathrm{In}$, $^{130--135}\mathrm{Sn}$, $^{131--136}\mathrm{Sb}$, and $^{132--140}\mathrm{Te}$ have been measured with high precision (10 ppb) using the Penning-trap mass spectrometer JYFLTRAP. Among these, the masses of four $r$-process nuclei $^{135}\mathrm{Sn}$, $^{136}\mathrm{Sb}$, and $^{139,140}\mathrm{Te}$ 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-07-16 | Physical Review Letters |