1. The LISA spectrometer David O’Donnell STFC Daresbury Laboratory

2. What is LISA? Light Ion Spectrometer Array Array of silicon detectors Design based on TIARA -Si array for transfer reactions at GANIL Designed to detect charged particles at the target position of the Jyvaskyla JUROGAM-RITU-GREAT apparatus

3. Why use LISA?...but it has its limitations Decay by proton emission – too fast for standard RDT Use LISA to detect fast proton decays ToF > 0.5  s Recoil-decay tagging has proven to be extremely successful...

4. Why use LISA?...but it has its limitations Decay by proton emission – too fast for standard RDT Use LISA to detect fast proton decays ToF > 0.5  s Recoil-decay tagging has proven to be extremely successful...

5. Why use LISA?...but it has its limitations Decay by proton emission – too fast for standard RDT Use LISA to detect fast proton decays ToF > 0.5  s Recoil-decay tagging has proven to be extremely successful...  

6. Why use LISA?...but it has its limitations Decay by proton emission – too fast for standard RDT Use LISA to detect fast proton decays ToF > 0.5  s Recoil-decay tagging has proven to be extremely successful...

7. Why use LISA?...but it has its limitations Decay by proton emission – too fast for standard RDT Use LISA to detect fast proton decays ToF > 0.5  s Recoil-decay tagging has proven to be extremely successful...  p

8. Why use LISA?...but it has its limitations Decay by proton emission – too fast for standard RDT Use LISA to detect fast proton decays Recoil-decay tagging has proven to be extremely successful...

9. Why use LISA? Detection of prompt charged particles emitted from deformed high-lying states Rudolph et al., PRL 80 (1998) 3018 Also as a veto to select weak xn evaporation channels following fusion-evaporation reactions

10. LISA: a few details Novel target changing mechanism: two rotating targets, an alpha source and quartz glower Two octagonal Si barrels and two Si annular detectors: ≈ 80% of 4  Molybdenum foils to shield from scattered heavy-ions

11. LISA: a few details Novel target changing mechanism: two rotating targets, an alpha source and quartz glower Two octagonal Si barrels and two Si annular detectors: ≈ 80% of 4  Molybdenum foils to shield from scattered heavy-ions

12. LISA: a few details Novel target changing mechanism: two rotating targets, an alpha source and quartz glower Two octagonal Si barrels and two Si annular detectors: ≈ 80% of 4  Molybdenum foils to shield from scattered heavy-ions

13. LISA: a few details Novel target changing mechanism: two rotating targets, an  source and quartz glower Two octagonal Si barrels and two Si annular detectors: ≈ 80% of 4  Molybdenum foils to shield from scattered heavy-ions

14. Commissioning experiment @ JYFL November 2009 58 Ni (300 MeV) + 106 Cd -> 164 Os * LISA – JUROGAM II – RITU – GREAT Limited electronics set-up: two inner barrel detectors, two outer barrel detectors and one annular detector

15. Results of commissioning Simulation

16. Future of LISA Plan to repeat 58 Ni + 106 Cd commissioning measurement with full array –study 159 Re (p4n) Other intertesting cases include 169 Au

17. Future of LISA Identify candidates for prompt proton emission outside of Z~28, N~28 –Possibly neutron-deficient Te isotopes? Use in “double-  -tagging” (D.G. Jenkins et al. proposal to JYFL) –Si detectors replaced with plastic scintillator to provide larger coverage –Study astrophysically important nuclei beyond N=Z line ( 66 Se) Any other ideas?

18. LISA collaboration STFC Daresbury: R. Griffiths, M. Labiche, P. Morrall, D. O’Donnell, J. Simpson and J. Strachan. University of Liverpool: R.J. Carroll, D.T. Joss, R.D. Page, J. Thornhill and D. Wells. University of Jyväskylä: T. Grahn, P.T. Greenlees, K. Hauschild, A. Herzan, U. Jakobsson, P.M. Jones, R. Julin, S. Juutinen,S. Ketelhut, M. Leino, A. Lopez-Martens, P. Nieminen, P. Peura, P. Rahkila, S. Rinta-Antila, P. Ruotsalainen, M. Sandzelius, J. Sarén, C. Scholey, J. Sorri and J. Uusitalo. University of the West of Scotland: J.F. Smith