Dipole Polarizability Studies @ REX-ISOLDE & TRIUMF€¦ · Suppression of typical rainbow in elastic cross sections. Are these features characteristic of halo nuclei? Long range

Dipole Polarizability Studies @ REX-ISOLDE & TRIUMF

Daniel Galaviz RedondoIEM,CSIC

MAGISOL meeting, Madrid

January 19th, 2007

Daniel Galaviz Redondo, IEM-CSIC Dipole Dipolarizability @ REX-ISOLDE & TRIUMF

Overview

Motivation

Observed effects on 6He

Proposed experiments:

11Be @ REX-ISOLDE

11Li @ TRIUMF

Summary


Motivation

Halo nuclei: new field in nuclear physics

Elastic scattering around the Coulomb Barrier

Recent results on 6He

presence of large dipole polarizability

motivation for further investigations


6He+208Pb Experiment @ CRC

beamtarget

LEDALAMPDINEX135o≤ ϑ ≤170o 20o≤ ϑ ≤64o 5o≤ ϑ ≤12o

Exp. PH189


6He : elastic scattering

6He + 208Pbelastic scattering

Experiment PH189 @ Louvain la Neuve

Forward and backward angular regions

Telescopes used for PiD


6He : elastic scattering

No coupling to the continuum( )

Unable to describe the data

Coupling to the continuum( )

Description of angular distribution

Contritutions { Nuclear

Dipole Polarizability


6He : break-up

Measured angular distribution for both:

Elastic (6He)

Break-up (4He)

TC ( )

TC ( )DB( )


6He : break-up6He + 208Pb @ 22 MeV

(ϑc.m. = 163o). . . . .. . . . . . . . . . Transfer to the continuum

Direct break-upBreak-up (4He)

No Direct break-up process

Transfer to continuumprovides reasonabledescription of data

neutrons transfered to low E continuum states in target

4He-nuclei carry large fraction of the energy


6He: what have we learned?

Breakup mechanism is dominated by neutron transfer to the continuum

Long range absorption dominant in elastic scattering of 6He

Suppression of typical rainbow in elastic cross sections.

Are these features characteristic of halo nuclei?

Long range absorption is produced by nuclear and Coulomb coupling to the continuum (4He + 2n)


Future experiments

Study of halo effects in the scattering of 11Li with heavy targets at energies around the Coulomb barrier

(TRIUMF)

Explore similar effects on other halo nuclei

Exploring halo effects in the scattering of 11Be on a heavy target at REX-ISOLDE


11Be @ REX-ISOLDE

Exploring halo effects in the scattering of 11Be on a heavy target at REX-ISOLDEExp. IS444:

Proposed: 27 shifts Accepted: 9 shifts

First shifts: November 2006 (together with Exp. IS438)

11Be beam { E = 2.91 MeV/uI = 3 103 pps

Demonstrate the separation between 11Be and 10Be


11Be @ REX-ISOLDE


11Be @ REX-ISOLDE11Be

6 DSSDs(42-44 µm,

16x16 strips)

6 PADs(～1500 µm)120Sn

(2mg/cm2)


10000 20000 30000 40000 50000 60000

20000

25000

30000

35000

40000

hist_de_e_f_5_15Entries 1948

0

1

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3

4

5

6

7

hist_de_e_f_5_15Entries 1948

E vs. E-back. Det. 5.Front 15!ΔE vs. Etotal. Det. 5. Front Strip 15. ϑlab ≈ 38o

ΔE (k

eV)

Etotal (keV)

11Be @ REX-ISOLDE

Preliminary Analysis

11Be10Be??


11Li @ TRIUMF

Exp. E1104: Study of halo effects in the scattering of 11Li with heavy targets at energies around the Coulomb Barrier

11Li beam

Possible beam time Summer 2007

Proposal approved Summer 2006

{ E = 2.4 - 3.1 MeV/uI = 104 pps

Similar set-up to the used in last REX-ISOLDE

experiment

Possibly use 20 µm DSSD


11Li @ TRIUMF

Chamber position(MAYA)

Text


11Li @ TRIUMF 01/17/2007 01:17 PMTRIUMF Public Home Page

Page 1 of 2http://www.triumf.info/public/index.php?summary=48

Canada's National Laboratory for Particle and Nuclear Physics

Left: One of the first MAYA events recorded, where a target hydrogen nucleus picks up the two outer

neutrons of 11Li, transforming it to 9Li and 3H.

Right: Robert Laxdal points out the instant when the first radioactive 11Li beam was delivered from ISAC-IIand transported to the first experiment (MAYA).

Welcome to TRIUMF.

Headline Story:

ISAC-II Delivers its first Radioactive Beam to an Experiment.

A major milestone at TRIUMF was passed Friday January 5, 2007 at 7:09pm when the first

radioactive beam, 11Li was delivered from the ISAC-II accelerator by TRIUMF scientist

Robert Laxdal, who has led the ISAC-II development from its inception. The beam was

transported to the MAYA experiment and within two hours data taking commenced. The

MAYA equipment was brought to TRIUMF from the GANIL laboratory in France by the

experiment co-spokesperson Herve Savajols to study the outer skin structure of the exotic

nucleus 11Li.

Read More...

Other Recent Headlines

Next Director of TRIUMF Announced (2006-12-04)

2006-2007 Saturday Morning Lecture Series (2005-11-06)

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Associate members University of Guelph, University of Manitoba,McMaster University,Université de Montréal,Queen's University, University of Regina,Saint Mary's University

Under a contribution through National Research Council of Canada

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http://www.triumf.info/public/index.php?summary=48


Summary

Study of halo nuclei: hot topic!

Results on 6He

Status of present/upcoming experiments:

motivation for further experiments

11Be @ REX-ISOLDE (Exp. IS444)

11Li @ TRIUMF (Exp. E1104)


Collaborators

IEM, CSIC, Madrid, Spain

University of York, United Kingdom

Universidad de Sevilla, Spain

CRC, Université Catholique de Louvain, Louvain-la-Neuve, Belgium

Nuclear Research Centre, Tehran, IranUniversidad de Huelva, Spain

TRIUMF, CanadaUniversity of Leuven, Belgium

ISOLDE, CERN, Geneva, Switzerland

Andrzej Soltan Institute for Nuclear Studies, Warsaw, Poland

University of Birmingham, United Kingdom

University of Edinburgh, United Kingdom

Aarhus University, Denmark

Chalmers University of Technology, Göteborg, Sweden

INFN Laboratori Nazionali del Sud, Catania, Italy


11Be @ REX-ISOLDE

Suggestions by the end of the meeting (deadline January 21, Sunday!)

JUNE 3–8, 2007Tokyo International Forum

原子核物理学国際会議会期：2007年６月3日（日）～８日（金）会場：東京国際フォーラム

http://www.inpc2007. jp/E-mail: [email protected]

　Conference Topics

The Standard Model and beyondNeutrino Physics

Hot and dense QCDHadron StructureHadrons in NucleiNuclear Structure

Nuclear ReactionsNuclear Astrophysics

Nuclear Applications and Interdisciplinary Researches

New Facilities and Instrumentations

Centennial Celebration of the Birth of Hideki Yukawa

　Conference Topics

The Standard Model and beyondNeutrino Physics

Hot and dense QCDHadron StructureHadrons in NucleiNuclear Structure

Nuclear ReactionsNuclear Astrophysics

Nuclear Applications and Interdisciplinary Researches

New Facilities and Instrumentations

Centennial Celebration of the Birth of Hideki Yukawa

Local Organizing CommitteeS. Nagamiya (KEK, chair)T. Motobayashi (RIKEN, vice-chair)H. En'yo (RIKEN)H. Horiuchi (Kyoto U.)T. Nagae (KEK)M. Oka (Tokyo Inst. Tech.)H. Sakai (U. Tokyo)T. Suda (RIKEN)H. Toki (Osaka U.)

Program Committee

K. Asahi (RIKEN)K. Imai (Kyoto U.)H. Ohigawa (JAEA)T. Otsuka (U. Tokyo)T. Kajino (NAO)K. Kato (Hokkaido U.)T. Kishimoto (Osaka U.)T. Kugo (Kyoto U.)S. Kubono (U. Tokyo)N. Saito (KEK)H. Sakurai (RIKEN)Y. Suzuki (U. Tokyo)T. Nakano (Osaka U.)T. Noro (Kyushu U.)O. Hashimoto (Tohoku U.)T. Hatsuda (U. Tokyo)E. Hiyama (Nara Women U.)Y. Miake (Tsukuba U.)H. Miyatake (KEK)M. Yahiro (Kyushu U.)S. Kumano (KEK)W. Zhan (Lanzhou)H.C. Bhang (Seoul Natil. U.)S.N. Yang (Taiwan U.)

Local Organizing Committee S. Nagamiya (KEK, chair) T. Motobayashi (RIKEN, vice-chair) H. En'yo (RIKEN)H. Horiuchi (Kyoto U.)T. Nagae (KEK)M. Oka (Tokyo Inst. Tech.)H. Sakai (U. Tokyo)T. Suda (RIKEN)H. Toki (Osaka U.)

Program Committee

K. Asahi (RIKEN)K. Imai (Kyoto U.)H. Ohigawa (JAEA)T. Otsuka (U. Tokyo)T. Kajino (NAO)K. Kato (Hokkaido U.)T. Kishimoto (Osaka U.)T. Kugo (Kyoto U.)S. Kubono (U. Tokyo)N. Saito (KEK)H. Sakurai (RIKEN)Y. Suzuki (U. Tokyo)T. Nakano (Osaka U.)T. Noro (Kyushu U.)O. Hashimoto (Tohoku U.)T. Hatsuda (U. Tokyo)E. Hiyama (Nara Women U.)Y. Miake (Tsukuba U.)H. Miyatake (KEK)M. Yahiro (Kyushu U.)S. Kumano (KEK)W. Zhan (Lanzhou)H.C. Bhang (Seoul Natil. U.)S.N. Yang (Taiwan U.)

Local Organizing Committee S. Nagamiya (KEK/JAEA, chair) T. Motobayashi (RIKEN, vice-chair) H. En'yo (RIKEN) H. Horiuchi (Kyoto U.) T. Nagae (KEK) M. Oka (Tokyo Inst. Tech.) H. Sakai(U. Tokyo) T. Suda (RIKEN) H. Toki (Osaka U.)International Advisory Committee F. Alejandro (Mexico), A. Arima (Japan), J. Aysto (Finland), A. B. Balantekin (USA), P. D. Barnes (USA), G. Baym (USA), G. F. Bertsch (USA), J.-P. Blaizot (Italy), P. Braun-Munzinger (Germany), T. Bressani (Italy), L. S. Cardman (USA), R. F. Casten (USA), T. Di Toro(Italy), A. C. S. Fonseca (Portugal), S. J. Freedman (USA), B. Frois (France), B. R. Fulton (England), A. Gal (Israel), S. Gales (France), D. F. Geesaman (USA), C. K. Gelbke (USA), H.-A. Gustafsson (Sweden), I. Hamamoto (Sweden), M. N. Harakeh (The Netherlands), W. Haxton (USA), W. F. Henning (Germany), D. W. Hertzog (USA), K. Heyde (Belgium), M. S. Hussein (Brazil), W.-Y. P. Hwang (Taiwan), M. Ishihara (Japan), B. V. Jacak (USA), X. D. Ji (USA), R. C. Johnson (United Kingdom), B. Jonson (Sweden), P. Kienle (Germany), K. Kubodera (USA), S. Kullander (Sweden), K. H. Langanke (Germany), P. Levai (Hungary), A. B. McDonald (Canada), R. McKeown (USA), L. McLerran (USA), V. Metag (Germany), D. P. Min (Korea), W. Mittig (France), E. Moya de Guerra (Spain), B. Mueller (USA), W. Nazarewicz (USA), J. W. Negele (USA), J. Nolen (USA), Y. Oganesyan (Russia), A. Ogloblin (Russia), C. C. Petitjean (Switzerland), J.-M. Poutissou (Canada), A. Richter (Germany), D.-O. W. Riska (Finland), C. Rolfs (Germany), T. Roser (USA), K. Sato (Japan), J. P. Schiffer (USA), J. Schukraft (Switzerland), J. F. Sharpey-Schafer (South Africa), W. Q. Shen (China), I. Sick (Switzerland), B. Sinha (India), A. Suzuki (Japan), J. Symons (USA), A. W. Thomas (USA), L. Tomio (Brazil), W. Tornow (USA), R. E. Tribble (USA), I. TserruyaÅiIsraelÅj, W. T. H. van Oers (Canada), W. von Oertzen (Germany), W. Weise (Germany), M. C. F. Wiescher (USA), A. G. Williams (Australia), T. Yamazaki (Japan), K. Yazaki (Japan) , G. R. Young (USA), W. A. Zajc (USA)

Map

IUPAP, Science Council of Japan, Physical Society of JapanRIKEN, KEK, JAEA, RCNP, JWE, Yukawa Memorial Foundation

InternationalNuclearPhysicsConference

International Nuclear Phys ics Conference

New TokyoInternationalAirport, Narita

Shinjuku

Yamanote Line

Ueno

Tokyo

YurakuchoHamamatsucho

TokyoInternational

ForumHanedaAirport

Shinagawa

NARITA(New TokyoInternationalAirport)

NARITA(New TokyoInternationalAirport)

TokyoTokyo

KyotoKyoto

OsakaOsaka

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Dipole Polarizability Studies @ REX-ISOLDE & TRIUMF€¦ · Suppression of typical rainbow in elastic cross sections. Are these features characteristic of halo nuclei? Long range

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