Thorsten Kröll* / Gary Simpson+

Slides:

Advertisements

Similar presentations

Investigation of short-lived nuclei using RIBs

Advertisements

Study of single particle properties of neutron-rich Na istopes on the „shore of the island of inversion“ by means of neutron-transfer reactions Thorsten.

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.

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

Coulomb excitation with radioactive ion beams

University of Liverpool

Study of single particle properties of neutron-rich Na istopes on the „shore of the island of inversion“ by means of neutron-transfer reactions Thorsten.

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°-

Proton Inelastic Scattering on Island-of-Inversion Nuclei Shin’ichiro Michimasa (CNS, Univ. of Tokyo) Phy. Rev. C 89, (2014)

Evolution of nuclear shape in the light Radon isotopes Andrew Robinson, David Jenkins, Stewart Martin-Haugh University of York Jarno Van De Walle CERN.

Latest results from MINIBALL at REX‐ISOLDE

Spectroscopy and lifetime measurements at ReA12 Hiro IWASAKI (NSCL/MSU) 7/12/2014Recoil Separator for ReA12 workshop1.

ISCC 24 May 2004L.M. Fraile L.M. Fraile, CERN PH/IS ISOLDE scientific coordinator’s report ISOLDE Collaboration Committee 24 th May 2004 ISOLDE scientific.

UNIVERSITY OF JYVÄSKYLÄ Results from the first tests with the SPEDE spectrometer Philippos Papadakis ISOLDE Workshop and Users Meeting 2014.

Luis M Fraile ISOLDE, PH/IS, CERN, Switzerland Universidad Complutense, Madrid, SPAIN FastPool Fast timing pool of detectors and electronics FastPool EURONS.

N. Saito The RISING stopped beam physics meeting Technical status of RISING at GSI N. Saito - GSI for the RISING collaboration Introduction Detector performance.

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

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

CJ Barton Department of Physics INTAG Meeting – GSI – May 2007 Large Acceptance Bragg Detector at ISOLDE.

Coulomb excitation of 127,128 Cd R. Krücken 1, M. Gorska 2, P. Boutachkov 2, A. Dewald 5, R. Gernhäuser 1, A. Jungclaus 4, Th. Kröll 3, D. Mücher 1, F.

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

3/1/13 WR, DGS111 Inverse-kinematic studies with Gretina and Phoswich Wall Walter Reviol and Demetrios Sarantites (Washington University) Gretina Workshop,

UNIVERSITY OF JYVÄSKYLÄ RDDS measurements at RITU and prospects at HIE-ISOLDE T. Grahn University of Jyväskylä HIE-ISOLDE Spectrometer Workshop, Lund

Ideas for fast-timing experiments from TU Darmstadt … and recent results and technical developments Thorsten Kröll (TU Darmstadt) Work supported by BMBF.

Probed with radioactive beams at REX-ISOLDE Janne Pakarinen – on behalf of the IS494 collaboration – University of Jyväskylä ARIS 2014 Tokyo, Japan Shapes.

Coulomb excitation of neutron-rich 32,33 Mg nuclei with MINIBALL at HIE-ISOLDE P. Reiter 1, B. Siebeck 1, M. Seidlitz 1, A. Blazhev 1, K. Geibel 1, N.

H.Sakurai Univ. of Tokyo Spectroscopy on light exotic nuclei.

B elgian R esearch I nitiative on e X otic nuclei ISOLDE INTC-P-316 Spokespersons: G. Neyens, M.M. Rajabali, K.U. Leuven Local contact: K.T. Flanagan,

Title page J Van de Walle 1, I. Stefanescu 1, P Mayet 1, O Ivanov 1, F Aksouh 1, D Smirnov 1, JC Thomas 1, R Raabe 1, M Huyse 1, P Van Duppen 1 1 IKS KULeuven.

Trends in Heavy Ion Physics Research, Dubna, May Present and future physics possibilities at ISOLDE Karsten Riisager PH Department, CERN

Andreas Görgen INTC Shape Transitions and Coexistence in Neutron-Deficient Rare Earth Isotopes A. Görgen 1, F.L. Bello Garrote 1, P.A. Butler.

High-precision mass measurements below 48 Ca and in the rare-earth region to investigate the proton-neutron interaction Proposal to the ISOLDE and NToF.

Dipa Bandyopadhyay University of York

UNIVERSITY OF JYVÄSKYLÄ Mapping the boundaries of the seniority regime and collective motion: Coulomb excitation studies of 208 Po and 210,212 Rn Addendum.

Coulomb-excitation of the exotic nuclei 94 Kr and 96 Kr M. Albers 1, N. Warr 1, D. Mücher 1, A. Blazhev 1, J. Jolie 1, B. Bastin 2, C. Bernards 1, J. Butterworth.

Shape coexistence in the neutron- deficient Pb region: Coulomb excitation at REX-ISOLDE Liam Gaffney 1,2 Nele Kesteloot 2,3 1 University of the West of.

KS group meeting April 2007Transfer reactions at REX-ISOLDE: Status and a physical case to be studied K. U. Leuven One Nucleon Transfer Reactions Around.

Detection of X rays in the Neutron-Deficient Polonium Coulomb Excitation Experiments Nele Kesteloot IKS KU Leuven SCK CEN.

Coulomb excitation of the two proton-hole nucleus 206 Hg CERN-ISOLDE, Geneva, Switzerland (M. Kowalska, E. Rapisarda, T. Stora, F.J.C. Wenander) GSI, Darmstadt,

Georgi Georgiev CSNSM, Orsay, France Nuclear structure studies at the r-process path Coulomb excitation of odd-A neutron-rich Rb isotopes at REX-ISOLDE.

Magnetic moment and lifetime measurements in 140 Ba Proposal to the INTC Committee A. Jungclaus, C. Bauer, M. Danchev, R. Gernhäuser, A. Illana, P. John,

Addendum to IS587: Characterising excited states in and around the semi-magic nucleus 68 Ni using Coulomb excitation and one-neutron transfer Spokespersons:

Coulomb excitation of Coulomb excitation of doubly magic 132 Sn with MINIBALL at HIE-ISOLDE P. Reiter 1, D. Rosiak 1, B. Siebeck 1, M. Seidlitz 1, A. Blazhev.

HIE-ISOLDE experiments workshop

In-source laser spectroscopy of mercury isotopes (P-424)

HIE-ISOLDE experiments IS546 and IS596

Status report MINIBALL J. Van de Walle for the MINIBALL collaboration

Georgi Georgiev CSNSM, Orsay, France

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

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

Shape coexistence measurements in even-even neutron-deficient Polonium isotopes by Coulomb excitation, using REX-ISOLDE and the Ge MINIBALL array Proposal.

Structure of Sb nuclei around 132Sn as a testing ground for realistic shell model interactions Bartłomiej Szpak Institute of Nuclear Physics, Polish Academy.

IUAC H.J. Wollersheim, P. Doornenbal, J. Gerl

Measurement of the fission cross-section of 240Pu and 242Pu at CERN’s n_TOF facility CERN-INTC , INTC-P-280 Spokespersons: M. Calviani (CERN),

Coulomb Excitation of Neutron-rich

L. Acosta1, M. A. G. Álvarez2, M. V. Andrés2, C. Angulo3, M. J. G

Emmanuel Clément IN2P3/GANIL – Caen France

EUROPEAN ORGANIZATION FOR NUCLEAR RESEARCH Proposal to the ISOLDE and Neutron Time-of-Flight Committee Effects of the neutron halo in 15C scattering at.

ISOLDE Workshop and Users Meeting 2017

PHL424: γ-decay γ-decay is an electromagnetic process where the nucleus decreases in excitation energy, but does not change proton or neutron numbers This.

Perspectives for Nuclear Spectroscopy at the UNILAC

H.J. Wollersheim, P. Doornenbal, J. Gerl

Rare Isotope Spectroscopic INvestigation at GSI

Coulomb Excitation of 114, 116Sn

Physics cases for tracking

INTC matters . Magdalena Kowalska.

108Sn studied with intermediate-energy Coulomb excitation

Catalin Borcea IFIN-HH INPC 2019, Glasgow, United Kingdom

Presentation transcript:

Thorsten Kröll* / Gary Simpson+ Evolution of quadrupole and octupole collectivity north-east of 132Sn: the even Te and Xe isotopes CERN-INTC-2012-041, INTC-P-342 Thorsten Kröll* / Gary Simpson+ *TU Darmstadt – +LPSC Grenoble – TU München – TRIUMF – LMU München KU Leuven – CERN – IEM CSIC Madrid – Univ. Sofia – IFIN HH Bucharest IRNRE BAS Sofia – HIL Warszawa – Univ. Köln – Central Michigan Univ. Univ. Guelph – ILL Grenoble – Univ. West of Scotland – Univ. Jyväskylä Helsinki Inst. of Physics – IPHC Strasbourg – Univ. York – UC Madrid Work supported by BMBF (Nr. 06DA7040), LOEWE / HIC for FAIR, and the MINIBALL/REX-ISOLDE collaborations 5. Juli 2018 |

Region of Interest Doubly-magic shell closure in 132Sn ± 1 pair of neutrons and 1 pair of neutrons è irregular behaviour in 128Cd (IS477) and 136Te Xe isotopes: - regular behaviour at low spin/excitation energy (IS411) - onset of octupole collectivity (nf7/2 « ni13/2) N=82 140,142Xe Z=54 Xe Z=52 Te 136Te Z=50 Sn 132Sn terra incognita … concerning spectroscopy Letter of Intent: CERN-INTC-2010-045; INTC-I-111 October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 2

Octupole states in 142Xe Xe W. Urban et al., EPJA A 16, 303 (2003) Increasing D0 towards N=88 (maximum, “magic”??) ... indirect sign of increasing octupole collectivity? ... octupole collectivity expected to be smaller than in Ba with the octupole “magic” Z=56 Only indirect determination of D0 (except 140Xe) No octupole states known for 144Xe (N=90) No B(E3) values known in Xe above N=82! October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 3

Particle detector HIE-ISOLDE energies allow for heavy target / normal kinematics Multiple Coulomb excitation Reorientation best measured at backward CM angles è large angular coverage needed: T-REX Elastic scattering at forward angles cause problem (radiation damage) (in IS411 with Xe beams the inner rings of the standard CD had to be covered) è Modified T-REX configuration No forward CD No forward barrel Moving forward barrel away from target Moving CD closer to target Angular resolution: 2-6° Angular resolution: 2.5° Max. QLab (forward): 75° Max. QLab (forward): 65° ... works successfully @ intensity > 107/s D. Mücher et al. (IS510) October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 4

Particle detector Forward CD Backward barrel October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 5

Physics aims Multiple Coulomb excitation Observed yields depend on many transitional and diagonal MEs (E1,E2,E3) Additional input needed! - Coulex data from IS411 (lower beam energy, other target) - lifetimes will be measured at ILL Physics aims - diagonal E2 MEs (above 2+ state) è quadrupole moments Q2 - transitional octupole MEs è B(E3) values ... quantities not be determined by other methods!!!! October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 6

Target Forward CD Backward barrel 1 mg/cm2 206Pb 142Xe @ 4.5 MeV/u è middle of target E = 4.38 MeV/u Good separation in region covered by CD Pulse height deficite P energy loss (SRIM) P October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 7

Rate estimate / beam time request (I) 40 x s at REX 10 x s at REX B(E3) values estimated S. Raman et al., Phys. Rev. C 43, 556 (1991) B(E2) from IS411 Sensitivity to diagonal ME up to 30% (ME = ± 0.5 eb) Large angular range (CMS): 40°-132°, 147°-171° è different sensitivities on single/multiple excitation and reorientation Safe energy: 4.5 MeV/u (206Pb target) Cross section for target excitation: 0.5 mb è normalisation October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 8

Rate estimate / beam request (II) MINIBALL + T-REX, 206Pb target (1 mg/cm2) Beam intensity like in IS411 (106/s) … good for Day-1 experiment Beam contaminant: 142Cs, decay product of 142Xe (T1/2 = 1.23 s) Most challenging is the 3- state: è 200 particle-g-coincidences/d è doubly-differential cross section split data set into 7 angular bins (5 forward, 2 backward) < 10% statistical error per angular bin in 10 days of beam time è sensitivity on transitional ME: > 10%/0.5 eb … for positive parity states Q2 values will be determiend with much better precision + beam development for 136Te … already on our wish list for 10 years (IS411 and IS415) We request 30 shifts (10 days) of beam time October 31, 2012 | INTC Meeting | TUD - Institut für Kernphysik | Thorsten Kröll | 9