8th p-process workshop 2024

Updates on P-Process Related Measurements Using the Summing Technique with HECTOR

18 Oct 2024, 10:20

20m

Oral presentation Morning session

Speaker

John McDonaugh (University of Notre Dame)

Description

The High EffiCiency TOtal absorption spectrometeR (HECTOR) is a summing spectrometer comprised of 16 NaI(Tl) segmented crystals with 2 PMTs on each segment to allow for optimal light collection from incident $\gamma$-rays. The arrangement of the 16 NaI(Tl) crystals allows for almost total 4$\pi$ angular coverage to capture and sum together all $\gamma$-rays following the dexcitation of the compound nucleus formed during the reaction. An overview of the recent and current measurements with HECTOR to constrain the p-process will be discussed, including: 1) Cross-sections measured with HECTOR for (p,$\gamma$) and ($\alpha$,$\gamma$) reactions on ${}^{102}$Pd and ${}^{108,110}$Cd and their impact on the predictions of the $\gamma$-process abundances along with new branching point temperature constraints for ${}^{111}$In($\gamma$,n)/($\gamma$,p). 2) Cross-section measurements over possible resonant structures for ${}^{92,94}$Mo(p,$\gamma$) and their reaction rate impacts. 3) Current work on measuring the cross-sections for (p,$\gamma$) and ($\alpha$,$\gamma$) on ${}^{112,114,116}$Sn and ${}^{108}$Pd(p,$\gamma$)${}^{109}$Ag. 4) Future projects to continue measurements in this mass region. This project was supported by the National Science Foundation (NSF) under grant numbers PHY-2011890 and PHY-2310059.

Presentation materials

McDonaugh_8th_p-process_workshop.pdf

McDonaugh_8th_p-process_workshop.pptx