BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Direct Neutron Capture Measurements with a Storage Ring
DTSTART:20260604T091500Z
DTEND:20260604T111500Z
DTSTAMP:20260606T132400Z
UID:indico-event-39322@indico.in2p3.fr
DESCRIPTION:Speakers: Iris Dillman (TRIUMF)\n\n\n\nNeutron‑capture react
 ions play a central role in the synthesis of elements heavier than iron\, 
 proceeding through the slow (s)\, intermediate (i)\, and rapid (r) neutron
 ‑capture processes in stellar environments. Despite decades of experimen
 tal effort\, direct measurements of (n\,γ) reactions remain largely restr
 icted to stable or very long‑lived nuclei. Of the thousands of neutron
 ‑rich isotopes involved in astrophysical reaction networks\, only about 
 350 stable and fewer than 20 unstable isotopes have been studied directly.
  For nuclei with half‑lives of days or seconds\, direct measurements are
  generally considered impossible with existing techniques. Consequently\, 
 nucleosynthesis models rely heavily on theoretical predictions\, which can
  differ by orders of magnitude only a few steps away from stability\, maki
 ng neutron‑capture rates one of the dominant uncertainties in nuclear as
 trophysics.\nHeavy‑ion storage rings coupled to radioactive‑beam facil
 ities offer a promising path forward. Over the past decade\, the ESR and C
 RYRING at GSI Darmstadt have demonstrated the power of inverse‑kinematic
 s measurements of astrophysically relevant reaction rates\, although so fa
 r this approach has been limited to charged‑particle reactions.\nIn this
  talk\, I will outline two initiatives aimed at enabling direct neutron‑
 capture measurements in storage rings. The NRING project at CRYRING propos
 es to install a novel neutron target at an existing storage ring and to es
 tablish the required experimental methods. Ultimately\, fully exploiting n
 eutron‑capture studies with stored radioactive beams will require a purp
 ose‑built facility. The TRISR project aims to design and\, if feasible\,
  install a low‑energy heavy‑ion storage ring with an integrated neutro
 n target at the ISAC‑I facility at TRIUMF. Such a dedicated neutron‑ca
 pture storage ring\, optimized for the ISAC beam characteristics\, is expe
 cted to increase the achievable luminosity by up to eight orders of magnit
 ude compared to CRYRING\, allowing for the first time to measure directly 
 neutron‑capture reactions on nuclei with half‑lives down to seconds.\n
  \n\n\n[1] Ariel Tarifeño-Saldivia\, César Domingo-Pardo\, Iris Dillman
 n\, Yuri A. Litvinov\, "Direct Neutron Reactions in Storage Rings Utilizin
 g a Supercompact Cyclotron Neutron Target"\, https://arxiv.org/abs/2508.15
 465\, accepted for Phys. Rev. Acc.and Beams (2026)\n\nhttps://indico.in2p3
 .fr/event/39322/
URL:https://indico.in2p3.fr/event/39322/
END:VEVENT
END:VCALENDAR