Transitional 150Sm88 : Octupole Deformed or Not ?

Slides:

Advertisements

Similar presentations

T he Decline and Fall of β-Vibrations Newton: by William Blake ( ) Newton: by Godfrey Kneller 1689 John Sharpey-Schafer University of the Western.

Advertisements

Initial Science Case For GRETINA at ATLAS M.P. Carpenter Physics Division, Argonne National Laboratory ANL Gretina Workshop March 1, 2013.

The LISA spectrometer David O’Donnell STFC Daresbury Laboratory.

12 th January 2011 PRESPEC Decay Physics Workshop University of Brighton 2011 High-spin states feeding seniority isomers in the heaviest N=82 isotones.

The evolution of nuclear structure in light osmium isotopes; gamma ray spectroscopy of 163 Os and 165 Os Mark Drummond.

High spin states in 136,137 La, 148 Ce and 105 Mo.

Beyond Band Termination: Spectroscopy at Ultra-High Spin

A LaBr3 Fast Timing Array of NUSTAR detectors at JYFL

Measurements of cross-sections of neutron threshold reactions and their usage in high energy neutron measurements Ondřej Svoboda Nuclear Physics Institute,

INRNE BAS NEC'2007, Varna, Bulgaria Positron annihilation versus electron cloud Angel H. Angelov Institute for Nuclear Research and Nuclear Energy.

UNIVERSITY OF JYVÄSKYLÄ Lifetime measurements probing triple shape coexistence in 175 Au Tuomas Grahn Department of Physics University of Jyväskylä The.

IN A SEARCH FOR TETRAHEDRAL SYMMETRIES IN 156Dy S.N.T Majola†$, J F Sharpey-Schafer#*, R A Bark$, P Datta$, S P Bvumbi#, E A Georgieva Lawrie$, P Jones$,

Status of the ISOLDE DECAY STATION - IDS Hilde De Witte IDS status report, ISCC, June 24 th 2014.

Research activities of ATOMKI at former LSF IReS Strasbourg High-spin states J Timár, ATOMKI, Debrecen Prague 2007.

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

Some Ideas for A Future Plan of Research at ATLAS Xiaofeng Wang The Riley Group at FSU.

Search for two-phonon octupole excitations in 146 Gd Energy Postgraduate Conference 2013 University of Zululand/ University of the Western Cape Nontobeko.

High-spin structures in the 159 Lu nucleus Jilin University, China Institute of Atomic Energy 李聪博 The 13th National Nuclear Structure Conference of China.

FINUPHY Instrumentation for radioactive nuclear beam facilities Rauno Julin FINUPHY Madeira, February 9, 2005.

F. Azaiez (IPN-Orsay) The European Collaboration for Stable Ion Beams – ECOS Pushing the limits with high intensity stable beams A typical bottom up initiative.

Quadrupole collectivity in neutron-rich Cd isotopes Thorsten Kröll for the IS411/IS477/IS524 collaborations Work supported by BMBF (Nr. 06DA9036I and 05P12RDCIA),

D. CurienKazimierz Workshop September TetraNuc Collaboration.

1,2 Tshepo Dinoko, 3 Vasilij Andrianov, 3 Pavel Sedyshev 1 iThemba LABS, Somerset West 7129, South Africa 2 University of the Western Cape, Bellville 7535,

The changing structure of 160 Er from low to ultrahigh spin J. Ollier Daresbury Laboratory.

Saclay, 30 January 2007 Rauno Julin Department of Physics University of Jyväskylä FinlandJYFL In-beam Spectroscopy of In-beam Spectroscopy of Transfermium.

Search for chiral doublet structures in odd-A 79 Kr with the Hyperball2 CYRIC CYRIC/Tohoku University J.Timar ATOMKI (Hungary) K. Starosta (MSU)

Ondřej Svoboda Nuclear Physics Institute, Academy of Sciences of Czech Republic Department of Nuclear Reactors, Faculty of Nuclear Sciences and Physical.

Lifetime measurements from EXILL-FATIMA campaign Pietro Spagnoletti University of the West of Scotland.

Radioactive beam spectroscopy of 212 Po and 213 At with the EXOGAM array Nick Thompson University of Surrey.

Recoil-beta tagging David Jenkins. Odd-odd N=Z Fascinating laboratory for studying interplay of T=0 and T=1 states Very unusual low level density for.

NN2012, San Antonio, May 27 - June 1, 2012 High-seniority states in spherical nuclei: Triple pair breaking in tin isotopes Alain Astier, CSNSM Orsay, France.

Simulating the position sensitivity of the iThemba LABS segmented clover detector S. P. Noncolela 1, 2, T. D. Bucher 1, E. A. Lawrie 1, O. Shirinda 1,

PhD Experience By Suzan Bvumbi From University of Johannesburg South Africa.

Studies of chirality in the mass 80,100 & 190 regions Rob Bark iThemba LABS Chiral Symmetry in Hadrons & Nuclei.

Exploring the alpha cluster structure of nuclei using the thick target inverse kinematics technique for multiple alpha decays. Marina Barbui June, 23 rd,

J. F. Sharpey-Schafer Physics Department, University of Western Cape, Belleville, South Africa. Failures of Nuclear Models of Deformed Nuclei.

Dimitar Tonev, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences Lifetime measurements in mass regions A=100 and A=130 as.

Three years of cross-section measurements of (n,xn) threshold reactions at TSL Uppsala and NPI Řež O. Svoboda, A. Krása, A. Kugler, M. Majerle, J. Vrzalová,

Exploring the spectroscopy of vibrational levels in the transitional rare earth region University of Cape Town / iThemba LABS Siyabonga Majola Energy Postgraduate.

High accuracy neutron inelastic cross section measurements on 206 Pb A.Negret 1, L.C. Mihailescu 1,2, C. Borcea 1, Ph. Dessagne 3, K.H. Guber 4, M. Kerveno.

of very neutron deficient heavy nuclei

The 8Be anomaly and the fifth force

Shape coexistence in odd-Au isotopes investigated with BEGe detectors

E408S: The structure of 212Po from 8He reactions on 208Pb Phil Walker, University of Surrey photo from Wilton Catford (2004)

International Workshop SDANCA 2015

Georgi Georgiev CSNSM, Orsay, France

CERN-ISOLDE (J. Cederkäll, P. Delahaye, D. Voulot, L. Fraile, F

Measurement of the b-branch of 12B to the Hoyle state in 12C

P-347 Measurements of octupole collectivity in Rn and Ra nuclei using Coulomb excitation Addendum Peter Butler, David Joss and Marcus Scheck on behalf.

DSAM lifetime measurements in 194Tl

High Resolution 148Nd(3He,nγ) Two Proton Stripping Reaction and the structure of the 02+ State in 150Sm J. F. Sharpey-Schafer1, P. Papka2,3, S. P. Bvumbi4,

Status of the AGATA installation at GANIL

Properties of neutron-rich hafnium high-spin isomers: P-325

Cross-section Measurements of (n,xn) Threshold Reactions

Thorsten Kröll* / Gary Simpson+

Octupole correlation between the multiple chiral doublet bands in 78Br

Investigation into the gas mixing effect in ECRIS

Evolution of octupole collectivity in 221Th

Triangle Universities Nuclear Laboratory

Systematic study of Z = 83 nuclei: 193,194,195Bi

AIDA: introduction Advanced Implantation Detector Array (AIDA)

Multinucleon transfer reactions in the 40Ar+208Pb

Feeding of low-energy structures with different deformations by the GDR decay: the nuBall array coupled to PARIS M. Kmiecik, A. Maj, B. Fornal, P. Bednarczyk.

(Lawrence Berkeley National Laboratory)

Key Resonances in the 30P(p,γ)31S Gateway Reaction for the Production of Heavy Elements in ONe Novae Why is this important? The 30P(p,γ)31S had been shown.

Triangle Universities Nuclear Laboratory

Quest for chirality in 107Ag

O. Svoboda, A. Krása, A. Kugler, M. Majerle, J. Vrzalová, V. Wagner

Investigation of 178Hf – K-Isomers

Presentation transcript:

Transitional 150Sm88 : Octupole Deformed or Not ? Two Experiments: 1. 148Nd(α,2n)150Sm Eα = 25 MeV at Jyväskylä, Finland June 2009 2. 136Xe(18O,4n)150Sm E18O = 75 MeV at iThemba LABS, SA June 2009

J F Sharpey-Schafer, S P Bvumbi, P Papka, T E Madiba, PJones, R A Bark, L Bianco, D Curien, D Cullen, P E Garrett, P T Greenlees, R Julin, S Juutinen, E Khalee, A Korichi, E A Lawrie, J J Lawrie, S N T Majola, L P Masiteng, A Minkova, S M Mullins, P Nieminen, L L Riedinger, O Shirinda, J Simpson, J Timár University of Western Cape, South Africa. University of Zululand, South Africa. iThemba Laboratory for Accelerator Based Sciences, South Africa University of Stellenbosch, South Africa. JYFL, Jyväskylä, Finland. University of Guelph, Canada DRS-IPHC, Strasbourg, France CSNSM, Orsay, France INRNE, Bulgarian Academy of Sciences, Sofia, Bulgaria University of Tennessee, Tennessee, USA STFC Daresbury Laboratory, Warrington, UK ATOMKI, Debrecen, Hungary

152Gd88 Octupole Deformed ?? │02+> K=2- │01+> R R Chasman, PRL 42 (1979) 630 │02+> K=2- │01+> 152Gd88

Previous 150Sm Urban et al., Acta. Phys. Pol. B32 (2001) 2527 Phys. Lett. 185 (1987) 331 20+ 18+ 136Xe(18O,4n)150Sm 150Nd(α,4n)150Sm

1. 148Nd(α,2n)150Sm Eα = 25 MeV at Jyväskylä, Finland June 2009 JUROGAM: 24 “Clover” detectors in BGO shields near 90º to the beam direction → Pγ + 15 “large” HPGe in BGO shields. ~4 mg cm -2 thick 148Nd target (94% enriched) 2½ days gave 1.5 Tbyt data

JUROGAM at Jyväskylä

Air Conditioned Locked Digital Electronics

Susan Amel Siyabonga

from 148Nd(α,2n)150Sm reaction

2. 136Xe(18O,4n)150Sm E18O = 75 MeV at iThemba LABS, June 2009 AFRODITE: 8 “Clover” detectors in BGO shields 4 at 90º to the beam direction 4 at 135º to the beam direction ~3 mg cm -2 thick 136Xe target (99.8% enriched) Cryogenically frozen on to a liquid nitrogen cooled backing ( 1mm Cu covered with 20 mg cm -2 Bi) Xe freezes at 161K; Liquid Nitrogen boils at 63K. 4 days gave ~ 5.108 γγ coincidences

from 136Xe(18O,4n)150Sm reaction

156Dy from the K=2 γ-band ground state band aligned i13/2 band 2nd Gammasphere Data Nov. 2008 K=2 γ-band ground state band aligned i13/2 band 2nd vacuum 156Dy from the 148Nd(12C,4n)156Dy reaction Spin I ( ħ )

156Dy from the K=2 γ-band built on the aligned i13/2 band ground state 148Nd(12C,4n)156Dy reaction Spin I ( ħ )

Progress Report: 1. (α,2n) data from JUROGAM looks very good; need to do γγγ analysis. Should get DSAM lifetimes of high spin states from the (18O,4n) data. The decay scheme is unusually complex; it will need hard work to find the second vacuum and γ-vibrational states. No conclusion yet on Octupole deformation vs. Octupole vibrations !!