6533b838fe1ef96bd12a3daf
RESEARCH PRODUCT
Proton decay of 108I and its significance for the termination of the astrophysical rp-process
S. ZhuD. SeweryniakP. CoppP. CoppM. AlbersGavin LotayS. A. KuvinS. A. KuvinA. M. RogersJ. SethiJ. SethiA. D. AyangeakaaRashi TalwarR. V. F. JanssensR. V. F. JanssensW. B. WaltersPhilip WoodsT. L. KhooS. BottoniM. P. CarpenterT. LauritsenCalem HoffmanH. M. DavidCatherine ScholeyJ. L. HarkerJ. L. HarkerC. J. ChiaraC. J. ChiaraKalle AuranenD. T. Dohertysubject
Nuclear and High Energy Physicsalpha decayProton decayQ valueastrofysiikkaNuclear Theory104Sb01 natural sciencesastrophysical rp process108I0103 physical sciencesMass analyzer107Te010306 general physicsNuclear ExperimentPhysicsIsotopeta114010308 nuclear & particles physicsInteraction energyrp-processlcsh:QC1-999proton decayHigh Energy Physics::ExperimentAtomic physicsydinfysiikkalcsh:Physicsdescription
Abstract Employing the Argonne Fragment Mass Analyzer and the implantation-decay-decay correlation technique, a weak 0.50(21)% proton decay branch was identified in 108I for the first time. The 108I proton-decay width is consistent with a hindered l = 2 emission, suggesting a d 5 2 origin. Using the extracted 108I proton-decay Q value of 597(13) keV, and the Q α values of the 108I and 107Te isotopes, a proton-decay Q value of 510(20) keV for 104Sb was deduced. Similarly to the 112,113Cs proton-emitter pair, the Q p ( I 108 ) value is lower than that for the less-exotic neighbor 109I, possibly due to enhanced proton-neutron interactions in N ≈ Z nuclei. In contrast, the present Q p ( Sb 104 ) is higher than that of 105Sb, suggesting a weaker interaction energy. For the present Q p ( Sb 104 ) value, network calculations with the one-zone X-ray burst model Mazzocchi et al. (2007) [18] predict no significant branching into the Sn-Sb-Te cycle at 103Sn.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-05-01 | Physics Letters B |