1 / 18

Proton emission from deformed rare earth nuclei

Proton emission from deformed rare earth nuclei. Robert Page. AREA. µ. t. e. 1. /. 2. Simple model for spherical proton emitters. Proton decay of 160 Re. Q p = 1271 keV. Proton emission as a spectroscopic tool. 160 Re Half-life (ms) E p ( keV ) d 3/2 h 11/2 Expt

moral
Download Presentation

Proton emission from deformed rare earth nuclei

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Proton emission from deformed rare earth nuclei Robert Page

  2. AREA µ t e 1 / 2 Simple model for spherical proton emitters Proton decay of 160Re Qp = 1271 keV

  3. Proton emission as a spectroscopic tool 160Re Half-life (ms) Ep (keV) d3/2h11/2Expt 1263 0.24480 0.67 h11/2 d3/2

  4. Deformed proton emitters 135Tb P.J. Woods et al., PRC69 (2004) 051302

  5. Known Proton Emitters B. Blank & M.J.G. Borge, Progress in Particle and Nuclear Physics 60 (2008) 403

  6. Why are there so few known proton emitters in this region? Known Proton Emitters Selectivity Yield B. Blank & M.J.G. Borge, Progress in Particle and Nuclear Physics 60 (2008) 403

  7. Counts (106) / 10 keV Decay Particle Energy (MeV) Implantation – proton – alpha correlation

  8. The proton emitter 159Re Counts / 10 keV t1/2 = 21 ms Decay Particle Energy (MeV) D.T. Joss et al., Physics Letters B641 (2006) 34

  9. Implantation – proton correlations 50Cr + 92Mo → 135Tb + p6n Argonne FMA A = 135 only 60 mm thick DSSD P.J. Woods et al., PRC69 (2004) 051302

  10. Beta-decay half-lives Moller, Nix & Kratz, Atomic Data & Nuclear Data Tables 66 (1997) 131

  11. Proton-decay half-lives

  12. Fusion-evaporation reactions Compound nuclei

  13. Fusion-evaporation pxn reactions ~3 nb ~30 mb

  14. (Super-)FRS A & Z separation AIDA Isomer g decays or known p for unique A & Z identification Selectivity

  15. Atomic number Z  = 3.6 / hour = 0.6 / week Neutron number N  Predicted Super FRS Yields @ 1012/s Yield

  16. Predicted Super FRS Yields @ 1012/s Yield Atomic number Z  = 3.6 / hour = 0.6 / week Neutron number N 

  17. Some physics opportunities • New proton emitters • Weak proton-decay branches • Proton-decay fine structure • Precision measurements • Beta-delayed gamma spectroscopy

  18. Outstanding questions • Background from b and bp decays • (1 mm thick DSSDs cf. 60 mm) • Identify best physics cases • Choose best primary beam • Your input is welcome... Robert Page

More Related