6533b85bfe1ef96bd12baa39
RESEARCH PRODUCT
Mass Measurements of Very Neutron-Deficient Mo and Tc Isotopes and Their Impact on rp Process Nucleosynthesis
S. HofmannF. P. HeßbergerJens KetelaerE. HaettnerG. AudiMu WangPeter G. ThirolfKlaus BlaumFrank HerfurthThomas RauscherGerrit MarxYuri N. NovikovHendrik SchatzSergey EliseevLutz SchweikhardS. RahamanC. ScheidenbergerJochen KetterBao-hua SunDaniel RodríguezM. MazzoccoW. R. PlaßC. WebeDieter AckermannHans-jürgen KlugeMichael BlockT. FleckensteinG. Vorobjevsubject
PhysicsIsotope010308 nuclear & particles physicsGeneral Physics and AstronomyFOS: Physical sciencesrp-process[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Penning trapMass spectrometry7. Clean energy01 natural sciencesAtomic massNuclear physics13. Climate actionNucleosynthesis0103 physical sciencesNeutronNuclideNuclear Experiment (nucl-ex)010306 general physicsNuclear Experimentdescription
The masses of ten proton-rich nuclides, including the N=Z+1 nuclides 85-Mo and 87-Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Evaluation 2003 a systematic shift of the mass surface by up to 1.6 MeV is observed causing significant abundance changes of the ashes of astrophysical X-ray bursts. Surprisingly low alpha-separation energies for neutron-deficient Mo and Tc are found, making the formation of a ZrNb cycle in the rp process possible. Such a cycle would impose an upper temperature limit for the synthesis of elements beyond Nb in the rp process.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-03-01 |