1. Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04 In-beam and decay spectroscopy of transfermium elements 251 Md

2. Contents Focal plane decay studies – 255 Lr, 253 No In-beam electron spectroscopy – 254 No In-beam gamma-ray spectroscopy – 254 No, 250 Fm, 251 Md Future developments Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

3. Focal Plane Decay Studies Recent Experiments: 255 Lr alpha decay (P.T. Greenlees et al., JYFL) also studied in GANIL (Ch. Theisen et al., Saclay) and at GSI in decay of 259 Db (F.P.Heßberger et al., GSI) 255 No alpha decay/ 254 No Isomer (JYFL expt - R.-D. Herzberg et al., Uni. Liverpool) 254 No Isomer also studied at ANL (T.L. Khoo et al.,ANL) 253 No alpha decay (JYFL expt - R.-D. Herzberg et al., Uni. Liverpool) (GSI expt - F.P.Heßberger et al., GSI) Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

4. Single-Particle States in 255 Lr Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04 Theory: 100 7/2- 5/2- 7/2+ 9/2+ 1/2- 0 0.5 WSHFB Cwiok et al., NPA 573 (1994) 356 Bender et al., NPA 723 (2003) 354

5. The GREAT Spectrometer UK Universities + Daresbury 2 x 60mm x 40mm DSSD 28 x 28mm x 28mm PIN Diodes 24 x 12 Segmented Planar Ge Compton-Suppressed Segmented Ge Clover Position-Sensitive MWPC Total Data Readout (TDR) Acquisiton System Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

6. Alpha Decay of 255 Lr – JYFL data Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04 P. T. Greenlees et al. preliminary data N.B. in-growth of 8.37 MeV peak No α-γ or α-e coincidences

7. Alpha Decay of 255 Lr – GANIL data Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04 Ch. Theisen et al. preliminary data New states in 247 Es Strongest α line is not the g.s. to g.s. transition 290 keV 247 Es 251 Md 7544 keV 235 keV 7596 keV

8. Alpha Decay of 253 No Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04 48 Ca + 207 Pb σ  1.3  b F. P. Heßberger et al. (GSI) R.-D. Herzberg et al. (JYFL) Ground state expected to be 9/2  [734] Recoil-α-γ/CE measurements

9. Alpha Decay of 253 No – JYFL Expt. R.-D. Herzberg, J. Phys G30 (2004) R123 Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

10. The SACRED Electron Spectrometer Paul Greenlees, Department of Physics, University of Jyväskylä, Finland H. Kankaanpää et al., Accepted for publication in NIM A see also P.A. Butler et al., NIM A381 (1996) 433 ENAM’04, Callaway Gardens, Sept04

11. CE spectra from 208 Pb( 22 Ne,4n) 226 U Paul Greenlees, Department of Physics, University of Jyväskylä, Finland H.Kankaanpää et al., Accepted for publication in NIM A R.D. Humphreys et al., PRC 69 (2004) 064234 226U level scheme: P.T. Greenlees et al., J. Phys. G 24 (1998) L63 ENAM’04, Callaway Gardens, Sept04

12. Recoil-gated CE spectrum from 208 Pb( 48 Ca,2n) 254 No Paul Greenlees, Department of Physics, University of Jyväskylä, Finland P.A. Butler et al., PRL 89 (2002) 202501 ENAM’04, Callaway Gardens, Sept04

13. The JUROGAM Ge Array Paul Greenlees, Department of Physics, University of Jyväskylä, Finland 43 PhaseI and GASP-type detectors – Ex. EUROBALL and UK-France loan pool Efficiency ~ 4.2% @ 1.3 MeV TDR data acquisition system – Data rate ~ 5 MB/s @ 10 kHz Software BGO suppression Autofill system built by University of York, part of GREAT Project Online/Offline Sorting – Grain developed by P. Rahkila ENAM’04, Callaway Gardens, Sept04

14. Recoil-Gated Gamma-Ray Spectrum from 208 Pb( 48 Ca,2n) 254 No S.Eeckhaudt et al., JYFL – Poster 143 Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

15. Singles Gamma-Ray Spectra from 204 Hg( 48 Ca,2n) 250 Fm Paul Greenlees, Department of Physics, University of Jyväskylä, Finland A. Pritchard, R.-D. Herzberg et al., University of Liverpool ”Online” Data! ENAM’04, Callaway Gardens, Sept04

16. Coincidence Gamma-Ray Spectra from 204 Hg( 48 Ca,2n) 250 Fm Paul Greenlees, Department of Physics, University of Jyväskylä, Finland A. Pritchard, R.-D. Herzberg et al., University of Liverpool ”Online” Data! Energy (keV) Counts 467 (20+) ENAM’04, Callaway Gardens, Sept04

17. Electromagnetic Properties Odd-proton orbitals in 251Md / 255Lr B(M1)/B(E2) depends on (g K -g R )/Q 0 Paul Greenlees, Department of Physics, University of Jyväskylä, Finland g K ~ 0.7 Mainly E2 [514] 7-27-2 7 -27 -2 7 +27 +2 [633] 7+27+2 g K ~ 1.3 Mainly M1 1 -21 -2 [521] 1-21-2 a ~ 0.9 : g K ~ -0.55 Mainly E2 ENAM’04, Callaway Gardens, Sept04

18. Recoil-Gated Gamma-Ray Spectrum from 205 Tl( 48 Ca,2n) 251 Md Paul Greenlees, Department of Physics, University of Jyväskylä, Finland A.Chatillon, Ch. Theisen et al., CEA Saclay ENAM’04, Callaway Gardens, Sept04

19. Gamma-Gamma Coincidences 205 Tl( 48 Ca,2n) 251 Md Paul Greenlees, Department of Physics, University of Jyväskylä, Finland A.Chatillon, Ch. Theisen et al., CEA Saclay ENAM’04, Callaway Gardens, Sept04

20. Dynamic Moments of Inertia J (2) Paul Greenlees, Department of Physics, University of Jyväskylä, Finland J (2) (hbar 2 MeV -1 ) Rotational Frequency ENAM’04, Callaway Gardens, Sept04

21. Future Developments Paul Greenlees, Department of Physics, University of Jyväskylä, Finland + = SAGE Combined In-beam electron and gamma spectroscopy Liverpool/Daresbury/JYFL Collaboration Digital Electronics Near Future: In-beam spectroscopy of 253 No and 255 Lr with JuroGam ENAM’04, Callaway Gardens, Sept04

22. Collaborators: Paul Greenlees, Department of Physics, University of Jyväskylä, Finland University of Liverpool, UK DAPNIA/SPhN CEA Saclay, France GSI Darmstadt, Germany IReS Strasbourg, France ANL Argonne, USA University of Helsinki, Finland University of Oslo, Norway Ludwig Maximilians Universität, Germany Niels Bohr Institute, Denmark ENAM’04, Callaway Gardens, Sept04

23. 250 Fm Dynamic Moment of Inertia J (2) Paul Greenlees, Department of Physics, University of Jyväskylä, Finland Theory: M. Bender et al., NPA 723 (2003) 354 ENAM’04, Callaway Gardens, Sept04

24. 251 Md Dynamic Moment of Inertia J (2) Paul Greenlees, Department of Physics, University of Jyväskylä, Finland Theory: M. Bender et al., NPA 723 (2003) 354 ENAM’04, Callaway Gardens, Sept04

25. Cf Isotopes: Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

26. Cm Isotopes: Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

27. Fm Isotopes: Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

28. Non-yrast states in 254 No Paul Greenlees, Department of Physics, University of Jyväskylä, FinlandENAM’04, Callaway Gardens, Sept04

29. Gamma-Gamma Coincidences 208 Pb( 48 Ca,2n) 254 No Paul Greenlees, Department of Physics, University of Jyväskylä, Finland S. Eeckhaudt et al., JYFL Counts Energy (keV) 537 (22+) 498 20+ ENAM’04, Callaway Gardens, Sept04