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

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Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 2