# Sources for Ultraviolet Nuclear Spectroscopy of Thorium (SUNSPOT)

Canonical: https://abierto.us/opportunities/hr001125s0008

- Solicitation number: HR001125S0008
- Notice type: Solicitation
- Status: Closed. Deadline was March 13, 2025
- Department: Department of Defense
- Agency: Defense Advanced Research Projects Agency
- Contracting office: Def Advanced Research Projects Agcy (HR0011)
- NAICS: 541715 Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)
- Product or service code: AC12 National Defense R&D Services; Department Of Defense - Military; Applied Research
- First posted: January 27, 2025
- Last posted: March 5, 2025
- SAM.gov: https://sam.gov/workspace/contract/opp/394a934a5e0c440ab12531c1f8ff4122/view

## Description

The Defense Advanced Research Projects Agency (DARPA) is soliciting innovative proposals in the development of highly coherent sources of vacuum ultraviolet (VUV) radiation for clock-grade spectroscopy of the recently discovered thorium (229m-Th) nuclear isomeric transition. Proposed research should investigate innovative approaches that enable revolutionary advances in science, devices, or systems. Specifically excluded is research that primarily results in evolutionary improvements to the existing state of practice.

## Publications

- January 27, 2025: Solicitation, due March 13, 2025. Notice f59da88448564322b6c81bc97a575162. https://sam.gov/workspace/contract/opp/f59da88448564322b6c81bc97a575162/view
- January 28, 2025: Solicitation, due March 13, 2025. Notice 54d33f01c86045b98b6d707e15e14d4d. https://sam.gov/workspace/contract/opp/54d33f01c86045b98b6d707e15e14d4d/view
- February 5, 2025: Solicitation, due March 13, 2025. Notice dc48907f8bcf4064b8bb371ee29fef55. https://sam.gov/workspace/contract/opp/dc48907f8bcf4064b8bb371ee29fef55/view
- March 5, 2025: Solicitation, due March 13, 2025. Notice 394a934a5e0c440ab12531c1f8ff4122. https://sam.gov/workspace/contract/opp/394a934a5e0c440ab12531c1f8ff4122/view

## Points of contact

- BAA Coordinator, SUNSPOT@darpa.mil

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Source: SAM.gov Contract Opportunities bulk extract. Confirm deadlines on SAM.gov before responding. Cite https://abierto.us/opportunities/hr001125s0008.