Presentation is loading. Please wait.

Presentation is loading. Please wait.

EWON Workshop, Prague, 10-12 May 2007 GOSIA as a tool for COULEX on exotic beams Katarzyna Wrzosek Heavy Ion Laboratory Warsaw University.

Published byTheodore Ryan Modified over 9 years ago

Similar presentations

Presentation on theme: "EWON Workshop, Prague, 10-12 May 2007 GOSIA as a tool for COULEX on exotic beams Katarzyna Wrzosek Heavy Ion Laboratory Warsaw University."— Presentation transcript:

1 EWON Workshop, Prague, 10-12 May 2007 GOSIA as a tool for COULEX on exotic beams Katarzyna Wrzosek Heavy Ion Laboratory Warsaw University

2 EWON Workshop, Prague, 10-12 May 2007 LOW - ENERGY COULOMB EXCITATION:  Well-established method to study collective excitations in nuclei.  Purely electromagnetic  the only nuclear properties involved are the matrix elements of the electromagnetic multipole moments.

3 EWON Workshop, Prague, 10-12 May 2007 208 Pb

4 EWON Workshop, Prague, 10-12 May 2007 COULEX Analysis Scheme Measured  yields available spectroscopic data ( , BR,  ) available spectroscopic data ( , BR,  ) Level scheme Experimental setup geometry: particle and  detectors set of matrix elements shape parameters for individual states SIGMA GOSIA MINIMALIZATION PROCEDURE Errors estimation Quadrupole rotational invariant sum rules

5 EWON Workshop, Prague, 10-12 May 2007 GOSIA  GOSIA is a Rochester – Warsaw semiclassical coupled- channel Coulomb excitation least-squares search code.  Developed in early eighties by T. Czosnyka, D. Cline, C.Y.Wu and continuously upgraded to fulfill requirements of new experiments.  Used extensively for Coulomb excitation studies of a wide range of nuclei.  Typical use of GOSIA: 1. Fitting of the matrix elements to the experimental data. 2. Simulation of the experiments: to predict which  - ray will be observed to check to what extent the observation will depend on individual matrix elements.

6 EWON Workshop, Prague, 10-12 May 2007 AN EXAMPLE: COULOMB EXCITATION OF 74,76 Kr @ GANIL  Coulomb excitation is the only method that can directly distinguish between different shapes of the nucleus  ideally suited to verify the shape coexistence scenario in the Kr isotopes.  Shape parameters of the two lowest 0 + states in 74 Kr and 76 Kr nuclei were inferred from coulomb excitation data.  The Coulomb excitation analysis were performed using the last squares fitting code GOSIA.

7 EWON Workshop, Prague, 10-12 May 2007 EXPERIMENTS (SPIRAL @ GANIL) 74 Kr + 208 Pb (5·10 5 pps, 4.7·A MeV) 74 Kr 76 Kr 76 Kr + 208 Pb (10 6 pps, 4.4·A MeV) E. Clement et al., submitted to Phys Rev C 508 keV 770 keV

8 EWON Workshop, Prague, 10-12 May 2007 39.5° - 49.0°61.4° - 71.8°71.0° - 87.7°107.0° - 121.5° 76 Kr

9 EWON Workshop, Prague, 10-12 May 2007 RESULTS

10 QUADRUPOLE ROTATIONAL INVARIANT SUM RULES model independent description of the nuclear shape is based on a fact, that scalar products of E2 operators are rotational invariants. Operator products may be expressed using the intermediate state expansion formula: is based on a fact, that scalar products of E2 operators are rotational invariants. Operator products may be expressed using the intermediate state expansion formula:

11 EWON Workshop, Prague, 10-12 May 2007 QUADRUPOLE ROTATIONAL INVARIANT SUM RULES model independent description of the nuclear shape To get information on triaxiality the higher order invariant is needed: To get information on triaxiality the higher order invariant is needed:

12 EWON Workshop, Prague, 10-12 May 2007RESULTS  The deformation of the 0 + 1 is very similar in 74 Kr and 76 Kr. Triaxiality parameter:  the ground state of 76 Kr is prolate, while the 0 + 2 state has an triaxial shape.  Both, the ground state and the 0 + 2 state of 74 Kr are triaxial, but with different  parameter.

13 EWON Workshop, Prague, 10-12 May 2007 Collaboration of 74,76 Kr Project CEA Saclay, France E.ClémentA.GörgenW.KortenE.BouchezA.ChatillonA.Hürstel Y.Le Coz A.ObertelliCh.TheisenJ.N.Wilson CEA/DIF, France J.-P. Delaroche M.GirodH.GoutteS.Péru GANIL, Caen, France J.M.Casandjian G. de France HIL Warsaw, Poland T.Czosnyka J.Iwanicki (OLL, Liverpool) P.J.Napiorkowski M.Zielińska (CEA Saclay) Oliver Lodge Lab., Liverpool, UK C.Andreoiu P.A.Butler R.-D.Herzberg D.G.Jenkins G.D.Jones Univ. Of Surrey, Guildford, UK W.N.Catford C.Timis GSI, Darmstadt, Germany F.Becker J.Gerl NBI, Copenhagen, Denmark G.Sleten

14 EWON Workshop, Prague, 10-12 May 2007 List of the experiments where GOSIA was recently used ISOLDE (MINIBALL), CERN:  J. Cederkall – 108 Sn, 110 Sn  J. Iwanicki - 88 Kr, 92 Kr  A. Hurst - 70 Se  I. Stefanescu – 68 Cu, 70 Cu  J. Van de Walle – 74 Zn GANIL (EXOGAM), FRANCE:  E. Bouchez – 76 Kr  E. Clement – 74 Kr  M. Zielińska – 44 Ar JYVASKYLA, FINLAND  F. Becker – 78 Kr JAEA, TOKAI, JAPAN:  M. Koizumi - 66 Zn, 68 Zn  T. Hayakawa – 78 Se  A. Osa - 84 Kr  Y. Toh – 70 Ge  M. Zielińska – 96 Mo ANL (Gammasphere), USA  A.Hayes – 178 Hf Next experiments ISOLDE (MINIBALL), CERN:  E. Clement – 96 Sr (Jul 2007)  P.Butler, P. Van Duppen - 182,184 Hg (Aug 2007) JRA6 INTAG

15 EWON Workshop, Prague, 10-12 May 2007 Warsaw Coulomb Excitation Group @ Heavy Ion Laboratory, Warsaw Univ.  Tomasz Czosnyka  Julian Srebrny  Jędrzej Iwanicki  Paweł Napiorkowski  Magdalena Zielińska (CEA Saclay)  Katarzyna Wrzosek  Katarzyna Hadyńska (UAM, Poznań)  Daniel Piętak (PW, Warsaw)

16 EWON Workshop, Prague, 10-12 May 2007 Thank you Thank you

Download ppt "EWON Workshop, Prague, 10-12 May 2007 GOSIA as a tool for COULEX on exotic beams Katarzyna Wrzosek Heavy Ion Laboratory Warsaw University."

Similar presentations

Model independent determination of quadrupole deformation parameters from Coulomb excitation measurements XVII th Nuclear Physics Workshop, Kazimierz Dolny.

Model independent determination of quadrupole deformation parameters from Coulomb excitation measurements XVII th Nuclear Physics Workshop, Kazimierz Dolny.
GOSIA As a Simulation Tool J.Iwanicki, Heavy Ion Laboratory, UW.

GOSIA As a Simulation Tool J.Iwanicki, Heavy Ion Laboratory, UW.
Shape coexistence in exotic nuclei studied by low energy coulomb excitation Emmanuel Clément CERN-PH, Geneva.

Shape coexistence in exotic nuclei studied by low energy coulomb excitation Emmanuel Clément CERN-PH, Geneva.
Coulomb excitation with radioactive ion beams

Coulomb excitation with radioactive ion beams
Initial Science Case For GRETINA at ATLAS M.P. Carpenter Physics Division, Argonne National Laboratory ANL Gretina Workshop March 1, 2013.

Initial Science Case For GRETINA at ATLAS M.P. Carpenter Physics Division, Argonne National Laboratory ANL Gretina Workshop March 1, 2013.
March 1, 2013GRETINA workshop 20131 Coulomb excitation of even 108-112 Ru and 104-108 Mo isotopes Juho Rissanen Nuclear Structure Group, Lawrence Berkeley.

March 1, 2013GRETINA workshop Coulomb excitation of even Ru and Mo isotopes Juho Rissanen Nuclear Structure Group, Lawrence Berkeley.
MINIBALL g-ray Spectroscopy far from Stability

MINIBALL g-ray Spectroscopy far from Stability
Coulomb excitation with radioactive ion beams

Coulomb excitation with radioactive ion beams
University of Liverpool

University of Liverpool
Alpha Stucture of 12 B Studied by Elastic Scattering of 8 Li Excyt Beam on 4 He Thick Target M.G. Pellegriti Laboratori Nazionali del Sud – INFN Dipartimento.

Alpha Stucture of 12 B Studied by Elastic Scattering of 8 Li Excyt Beam on 4 He Thick Target M.G. Pellegriti Laboratori Nazionali del Sud – INFN Dipartimento.
Γ spectroscopy of neutron-rich 95,96 Rb nuclei by the incomplete fusion reaction of 94 Kr on 7 Li Simone Bottoni University of Milan Mini Workshop 1°-

Γ spectroscopy of neutron-rich 95,96 Rb nuclei by the incomplete fusion reaction of 94 Kr on 7 Li Simone Bottoni University of Milan Mini Workshop 1°-
Measurement of the GMR and the GQR in unstable nuclei using the MAYA active target C. Monrozeau (Ph. D), E. Khan, Y. Blumenfeld.

Measurement of the GMR and the GQR in unstable nuclei using the MAYA active target C. Monrozeau (Ph. D), E. Khan, Y. Blumenfeld.
1 Andreas Görgen EURISOL – EURONS Town Meeting, Helsinki, 17.-19.9.2007.

1 Andreas Görgen EURISOL – EURONS Town Meeting, Helsinki,
Evolution of nuclear shape in the light Radon isotopes Andrew Robinson, David Jenkins, Stewart Martin-Haugh University of York Jarno Van De Walle CERN.

Evolution of nuclear shape in the light Radon isotopes Andrew Robinson, David Jenkins, Stewart Martin-Haugh University of York Jarno Van De Walle CERN.
Relativistic Coulomb excitation of nuclei near 100 Sn C.Fahlander, J. Eckman, M. Mineva, D. Rudolph, Dept. Phys., Lund University, Sweden M.G., A.Banu,

Relativistic Coulomb excitation of nuclei near 100 Sn C.Fahlander, J. Eckman, M. Mineva, D. Rudolph, Dept. Phys., Lund University, Sweden M.G., A.Banu,
UNIVERSITY OF JYVÄSKYLÄ Results from the first tests with the SPEDE spectrometer Philippos Papadakis ISOLDE Workshop and Users Meeting 2014.

UNIVERSITY OF JYVÄSKYLÄ Results from the first tests with the SPEDE spectrometer Philippos Papadakis ISOLDE Workshop and Users Meeting 2014.
Nele Kesteloot1,2 On behalf of the IS452/IS479 collaboration

Nele Kesteloot1,2 On behalf of the IS452/IS479 collaboration
Wolfram KORTEN 1 Euroschool Leuven – Septemberi 2009 Coulomb excitation with radioactive ion beams Motivation and introductionMotivation and introduction.

Wolfram KORTEN 1 Euroschool Leuven – Septemberi 2009 Coulomb excitation with radioactive ion beams Motivation and introductionMotivation and introduction.
Xy position from LYCCA Slowed down beams - new perspective for GOSIA scattering experiments at relativistic energies.

Xy position from LYCCA Slowed down beams - new perspective for GOSIA scattering experiments at relativistic energies.
Reiner Krücken - Yale University Reiner Krücken Wright Nuclear Structure Laboratory Yale University Why do we measure lifetimes ? The recoil-distance method.

Reiner Krücken - Yale University Reiner Krücken Wright Nuclear Structure Laboratory Yale University Why do we measure lifetimes ? The recoil-distance method.

Similar presentations

Ads by Google