A1 Journal article (refereed)
Proton decay of 108I and its significance for the termination of the astrophysical rp-process (2019)
Auranen, K., Seweryniak, D., Albers, M., Ayangeakaa, A.D., Bottoni, S., Carpenter, M.P., Chiara, C.J., Copp, P., David, H.M., Doherty, D.T., Harker, J., Hoffman, C.R., Janssens, R.V.F., Khoo, T.L., Kuvin, S.A., Lauritsen, T., Lotay, G., Rogers, A.M., Scholey, C., . . . Zhu, S. (2019). Proton decay of 108I and its significance for the termination of the astrophysical rp-process. Physics Letters B, 792, 187-192. https://doi.org/10.1016/j.physletb.2019.03.039
JYU authors or editors
Publication details
All authors or editors: Auranen, K.; Seweryniak, D.; Albers, M.; Ayangeakaa, A.D.; Bottoni, S.; Carpenter, M.P.; Chiara, C.J.; Copp, P.; David, H.M.; Doherty, D.T.; et al.
Journal or series: Physics Letters B
ISSN: 0370-2693
eISSN: 1873-2445
Publication year: 2019
Volume: 792
Issue number: 0
Pages range: 187-192
Publisher: Elsevier BV
Publication country: Netherlands
Publication language: English
DOI: https://doi.org/10.1016/j.physletb.2019.03.039
Publication open access: Openly available
Publication channel open access: Open Access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/63538
Additional information: SCOAP3
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 108 I for the first time. The 108 I proton-decay width is consistent with a hindered l=2 emission, suggesting a d [Formula presented] origin. Using the extracted 108 I proton-decay Q value of 597(13) keV, and the Q α values of the 108 I and 107 Te isotopes, a proton-decay Q value of 510(20) keV for 104 Sb was deduced. Similarly to the 112,113 Cs proton-emitter pair, the Q p (I108) value is lower than that for the less-exotic neighbor 109 I, possibly due to enhanced proton-neutron interactions in N≈Z nuclei. In contrast, the present Q p (Sb104) is higher than that of 105 Sb, suggesting a weaker interaction energy. For the present Q p (Sb104) 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 103 Sn.
Keywords: nuclear physics; astrophysics
Free keywords: alpha decay; proton decay; astrophysical rp process; 104Sb; 107Te; 108I
Contributing organizations
Related projects
- Ydin- ja kiihdytinfysiikan huippuyksik/3
- Julin, Rauno
- Research Council of Finland
Ministry reporting: Yes
VIRTA submission year: 2019
JUFO rating: 2