- Spectroscopy of Proton-rich Nuclei in Explosive Nuclear Astrophysics

PJ Woods, University of Edinburgh

on behalf of ANL, Edinburgh, York collaboration

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IGNITIONREACTIONS

NOVA, X-RAY Bursts,Type I SN

rp process

25,6Al(p,)26,7Si reactions and the abundance of the cosmic gamma ray emitter 26Al

The FMA at ATLAS

GammaSphere Coupled to the FMA

16O + 12C -> 26Si + 2n

Gate on 2+ ->0+ transition in 26Si

New results on gamma decaying states above proton thresholdin 27Si D Seweryniak, PJW et al., data being analysed

15O(,)19Ne reaction rate

First measurements of lifetimes of key astrophysical resonances in 19Ne made by Notre Dame Group

17 O(3 He, n –gamma)19Ne reaction used at Notre Dame tomake 1st measurement of lifetime of astrophysicalresonance, WP Tan et al. PRC 72 041302 (2005)

(also Kanungo et al. PRC 74 045803 (2006))

12 C + 10 B -> 19 Ne + 1p2n

Decays from 4.03 and 4.38 MeV states in 19Ne

Gamma energy as a function of gammasphere angle

Abundance curve of the elementsab

unda

nce

Atomic number

Fe

“The 11 Greatest Unanswered Questions of Physics”based on National Academy of Science Report, 2002

[Committee for the Physics of the Universe (CPU)]

How were the elements from iron to uranium made?

R-process nuclei will be synthesised by the fastfission of 1 GeV/u 238U ions at the new FAIR facility

Advanced Implantation Detection Array (AIDA)- will use new ASIC instrumented DSSDs

238U fission fragmentsfrom new super-FRS

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DESPEC collaboration

Summary

New data on 26,7Si resonances (and 24 Al)

Analysis in progress on Lifetimes of 19 Ne

Resonances

New AIDA project underway for FAIR

decay measurements on Super-FRS