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Author  |
Tarifeño-Saldivia, A.; Domingo-Pardo, C.; Dillmann, I.; Litvinov, Y.A. |
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Title |
Direct neutron reactions in storage rings utilizing a supercompact cyclotron neutron target |
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Journal Article |
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Year |
2026 |
Publication |
Physical Review Accelerators and Beams |
Abbreviated Journal |
Phys. Rev. Accel. Beams |
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Volume |
29 |
Issue |
6 |
Pages |
061601 - 24pp |
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Abstract |
We propose a new approach for a high-density free-neutron target, primarily aimed at nuclear astrophysics reaction studies in inverse kinematics with radioactive ions circulating in a storage ring. The target concept integrates four key subsystems: a neutron production source driven by a supercompact cyclotron utilizing 9Be(p; xn) reactions, an optimized moderator/reflector assembly using either heavy water or beryllium oxide with a graphite reflector shell to thermalize fast neutrons, a cryogenic liquid hydrogen moderator to maximize thermal neutron density in the interaction region, and beam pipe geometries that enable neutron-ion interactions while maintaining vacuum conditions for ion circulation. This integrated approach focuses on feasibility by incorporating readily available technologies. Using a commercial supercompact cyclotron delivering a proton beam of 130 μA, the design achieves thermal neutron areal densities of similar to 3.4 & times; 106 n/cm2 for a proof-of-concept demonstrator at the CRYRING ionstorage ring at GSI Darmstadt. This autonomous accelerator-target assembly design enables deployment at both in-flight and ISOL facilities to exploit their complementary production mechanisms. Potential upgrades based on higher-energy and/or higher-current cyclotrons will enable an increase in areal density to similar to 109 n/cm2. In combination with a customized low-energy storage ring and a radioactive ion-beam facility, the proposed solution could deliver luminosities above 1023 cm-2 s-1, thereby enabling neutron capture measurements of similar to mb cross sections within a few days of experiment. The proposed system represents a significant milestone toward enabling large neutron-capture surveys on short-lived nuclei, thereby opening a new avenue for understanding the synthesis of heavy elements in our universe. |
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Address |
[Tarifeno-Saldivia, Ariel; Domingo-Pardo, Cesar] UV CSIC, Inst Fis Corpuscular IFIC, Burjassot, Spain, Email: atarisal@ific.uv.es |
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Amer Physical Soc |
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English |
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Notes |
WOS:001792536400001 |
Approved |
no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7284 |
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