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Poland@ISOLDE

Poland@ISOLDE. Nuclear physics in Poland and plans related to ISOLDE. Marek Pfützner. ISOLDE Collaboration Committee Meeting, CERN, November 4, 2014. Some history.

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Poland@ISOLDE

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  1. Poland@ISOLDE Nuclear physics in Poland and plansrelated to ISOLDE Marek Pfützner ISOLDE Collaboration Committee Meeting, CERN, November 4, 2014

  2. Some history ● 1964 -1991 – Poland was the only country from behind the Iron Curtain having the oficial „observer” status at CERN ● July 1, 1991 – Poland becomes a member of CERN ● early 90’s(?) – Poland became a member of ISOLDE (W. Kurcewicz), after two years the funding was refused 2004: 50 years of CERN – a review by W. Kurcewicz lists 50 papers from ISOLDE experiments coauthored by Polish physicists  Some projects initiated and lead by scientists from Poland (before 2004):Octupole deformation in actinides (IS322 – W. Kurcewicz) New neutron-rich isotopes of bismuth, lead, and thallium(IS354 – K. Rykaczewski)Search for detour transitions in REC decay of 81Kr (IS355 – M. Pfützner)Coulomb excitations of neutron-rich 88Kr beam (IS424 – J. Iwanicki)

  3. Where we are In 2007 we were about 330 people active in nuclear physics Szczecin University University of Warsaw Faculty of Physics Heavy Ion Laboratory  National Centre for Nuclear Research  University of Łódź Maria Curie-Skłodowska University, Lublin  Institute of Nuclear Physics (PAN) Jagielonnian University University of Silesia

  4. Polska@ISOLDE Miniworkshop on Polish membership in CERN-ISOLDE Heavy-Ion Laboratory, Warsaw, May 23, 2014 A consortium „Polska@ISOLDE” was set up and all signaturesunder the agreement were collected October 1, 2014 Institute of Nuclear Physics, Kraków  Bogdan Fornal National Centre for Nuclear Research, Warsaw  Henryk Mach University of Łódź  Józef Andrzejewski University of Warsaw Heavy Ion Laboratory  Katarzyna Wrzosek-Lipska Faculty of Physics  Marek Pfützner

  5. Cluster transfer reactions for gamma-ray yrast spectroscopy AX + 7LiA+3-xY+α+xn Bogdan Fornal Institute of Nuclear Physics, Polish Academy of Sciences Krakow, Poland A new method for gamma-ray spectroscopic studies of yrast and non-yrast structuresin neutron-rich nuclei. It relies on the triton transfer process induced by radioactive beams on a 7Li target. Z Z+1  n ~2º 7Li AX A+1Y Z n Z+1 

  6. Gamma spectroscopy of n-rich 98,99Sr nuclei by the incomplete fusion reaction of 98Rb on 7Li: introduction to HIE-ISOLDE studies - experiment with MINIBALL + T-REX at REX-ISOLDE Spokespersons: Bogdan Fornal (Kraków) and Silvia Leoni (Milano) Collaboration: IFJ PAN Krakow – Univ. Milano - SLCJ Warsaw – ISOLDE CERN Reaction: 98Rb+ 7Li @ 2.85 MeV/A IS536 Detection system: MINIBALL + T-REX Coincidencec between g rays and a particles Results: Transfer of tritons into 98Rb, with emission of alpha particles, has a sizeable cross-section as predicted by DWBA calculations. By tagging on a particles one obtains clean g-ray spectra from triton transfer products. Yrast, near-yrast and non-yrast states are populated.

  7. 98Rb(60%)/98Sr(40%) (2.84 MeV/u) + 7LiF (1.5 mg/cm2) IBEAM (98Ru/98Sr) ≈ 2.5 x 104 pps Countingrate: ~0.03ev/s for a-g (10 k in 4 days) 98 99 98 99 Sr Sr Sr Y 98 Rb S. Bottoni et al, to be published, and S. Bottoni, PhDThesis

  8. 132Sn+ 7Li133Sb+α+2n A new proposal has been submitted to ISOLDE INTC: „Spectroscopy of particle-phonon coupled states in 133Sb by the cluster transfer reaction 132Sn on 7Li: an advanced test of nuclear interactions” Spokespersons: Silvia Leoni and Bogdan Fornal P-419presented tomorrow 2n 133 Sb t 132 Sn

  9. Ultra fast timing studies on exotic nuclei (at ISOLDE) by Henryk Mach, NCBJ for the Fast Timing Isolde Collaborations

  10. Basic Principles of Ultra Fast Timing (Advanced Time-Delayed Method) beta β The range for the measurements is from 30 ps to 30 ns (or longer) by the slope method and down to about 5-10 ps by the centroid shift method, see H.Mach et al. Nucl. Phys. A523 (1991) 197.

  11. IS322 - IS386 Ra - Ac octupole region IS386 Ba octupole region IS414 Mg island of inversion IS441 (2009) 81,82Zn decays IS441 134Sn, 136Sn decays IS317 76Rb to 76Kr decay IS474 Mn decay

  12. Lifetime of the 2+ state in 32Mg • Centroid shift technique using a two gamma ray cascade involving beta and 2151-885 keV gammas. • Detector calibration for BaF2 at energies close to a 2151 y 885 keV, and cascading via levels of precisely known lifetimes : • 88Rb (898-1836 keV) • 30Al (1263-2235 keV) • 24Na (1369-2754 keV) Triple coincidence: • Beta-Ge-Ge • Beta-Ge-BaF2(t) Beta-BaF2(t) time spectra gated by Ge energy

  13. B(E2)’s for Mg isotopes ATD [from O. Niedermaier] Low E CoulEx, Timing Intermediate E CoulEx

  14. IS474 IS579 P-429presented tomorrow

  15. Analysis of ISOLDE Coulex experiments: GOSIA code GOSIA: mostwidelyusedcodeforlow-energyCoulex T. Czosnyka et al., Bull. Am. Phys. Soc. 28 (1982) 745 http://www.slcj.uw.edu.pl/gosia Strong involvement of HIL Warsaw in Coulex data analysisof numerous ISOLDE experiments Shape coexistence 182-188Hg, 196-202Po, 188,190Pb Oblate shapes 140,142Sm 2+1 → 0+1 Evolution of collectivity and shape coexistence 96,98Sr, 93-99Rb, 94,96Kr 112Cd recoil (2+1 → 0+1) Kα (Hg) 4+1 → 2+1 Kβ (Hg) 2+2 → 0+1 182Hg MINIBALL: 8 triple clusters • E2 matrix elements between • yrast and non-yrast states up to 4+ • quadrupole moments of the 2+ states • shape parameters of the low-lying 0+ states • degree of mixing between low-lying • states K. Wrzosek-Lipska, M. Zielińska, P. Napiorkowski Bree et al., Phys. Rev. Lett. 112 (2014) 162701

  16. GOSIA - semiclassical Coulomb excitation codes Developed and supported at Rochester, Warsaw, and Köln.

  17. GOSIA Workshop, HIL, Warsaw • 1st GOSIA Workshop 2008 - EURONS • 2nd GOSIA Workshop 2013 - ENSAR • 27 participantsform 15 institutes9 ISOLDE users • Program • 12 presentations:examples of COULEX analysis • 3 working groups for hands-on session:practice with the GOSIA codededicated session for ISOLDE users • round-table discussion:users needs to GOSIA development.

  18. Future: 182,184Hg cont. Future: 180,182Hf P-??? IS562

  19. P-429presented tomorrow M. Madurga, S. Paulauskas

  20. Conversion electron spectroscopy Jarosław Perkowski University of Łódź

  21. ULESE(University of Lodz an electron spectrometer )

  22. Efficiency of the spectrometer

  23. Electrons from184Pt

  24. counting gas at atmospheric pressure p HV electrodes incomingidentified ion p ionizationelectrons e gating electrode charge amplification Trigger light PMT CCD Recordingsystem TPC with optical readout 6He 31Ar ?

  25. Probing the neutron halo of 6He using the Warsaw Optical Time Projection Chamber (OTPC) • Weak decay branch (10-6) 6He  a + d provides insight into the 2n halo of 6He • Bunches of 6He ions were delivered by REX-Isolde and implanted into the OTPC • Clear images of decay events with tracks of an a particle and a deuteron were recorded by a CCD camera • Detailed analysis is in progress Raabe Anthony Preliminary! ISOLDE, August 2012

  26. b decay of 8He @ Dubna CCD 4He 3H Q = 4.3 MeV 8He PMT Ea = 1150 keVEt = 2570 keVEn = 610 keV We see about 400 triton events.The branching for the bt is 0.9 %

  27. Thank you! The consortium Polska@ISOLDE is planning to apply to thePolish National Science Centre for funding our membership in ISOLDE. We hope to become a member again… Poland@

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