International Symposium on Nuclear Structure Physics Celebrating the career of Peter von Brentano pdf

International Symposium on Nuclear Structure Physics Celebrating the career of Peter von Brentano... The aim of the Symposium was to discuss recent achievements and new initiatives for r

International Symposium on Nuclear Structure Physics Celebrating the career of Peter von Brentano

Yale University, USA

World Scientific Publishing Co Pte Ltd

P O Box 128, Farcer Road, Singapore 912805

USA office: Suite IB, 1060 Main Street, River Edge, NJ 07661

UK office: 57 Shelton Street, Covent Garden, London WC2H 9HE

British Library Cataloguing-in-Publication Data

A catalogue record for this book is available from the British Library

Cover illustration: A detail from a painting entitled "Peter mit Fisch", by Tremezza von Brentano, 1996

Photo courtesy of the artist

NUCLEAR STRUCTURE PHYSICS

Copyright © 2001 by World Scientific Publishing Co Pte Ltd

All rights reserved This book, or parts thereof, may not be reproduced in any form or by any means, electronic or mechanical, including photocopying, recording or any information storage and retrieval system now known or to be invented, without written permission from the Publisher

For photocopying of material in this volume, please pay a copying fee through the Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923, USA In this case permission to photocopy is not required from the publisher

ISBN 981-02-4654-4

Printed in Singapore

P R E F A C E

The International Symposium on Nuclear Structure Physics (NP2001) was held in Gottingen Germany, March 5-8, 2001 The aim of the Symposium was to discuss recent achievements and new initiatives for research in nuclear structure and to celebrate the career of Peter von Brentano

NP2001 covered a broad range of exciting topics, including collective and proton-neutron excitations, phase transitions in nuclei, isospin, properties at high and low angular momentum, recent developments of nuclear theory, stud-ies of exotic nuclei far off stability, and the latest technological advances in detector design In all these fields, Peter von Brentano has been at the fore-front of research NP2001 honors his outstanding contributions

All together there were 124 participants and 39 Invited Talks arranged into

7 sessions In addition, there were a large number of Poster Presentations The excellent talks and posters and the active discussions reflect the renaissance of interest and excitement in nuclear structure physics at the dawn of the new millennium

The present volume contains the texts for both the Invited Talks and the Poster Presentations We thank the authors for the prompt submission of their manuscripts This has made it possible to publish these Proceedings in

a timely way

We are grateful to all those who contributed to the success of this ebratory Symposium We thank the members of the International Advisory Committee for their help in suggesting topics and speakers We are grateful to the University of Gottingen, especially its II Physikalisches Institut, for help

cel-in preparcel-ing and arrangcel-ing the Symposium and, cel-in particular, to the Local Organizing Committee for making the Symposium flow so smoothly A special thanks must go to Lucie Hamdi, the Symposium Secretary, for her dedicated, professional, and enthusiastic work in arranging virtually every aspect of the Symposium Without her efforts, the Symposium would not have been the success it was We are very grateful

We are greatly appreciative, and are honored by, the generosity of Tremezza von Brentano, the renowned artist, for providing the painting of Peter, herself, and a fish which furnished the basis for the Symposium poster and the cover of this volume We also acknowledge, with thanks, the wonderful a capella music provided by the group I Dodici, on the occasion of the Symposium Banquet

We could not have gone forward with the Symposium without the able financial support of a number of organizations In particular, we thank the Deutsches Bundesministerium fur Bildung und Forschung (BMBF), Deutsche

consider-Forschungsgemeinschaft (DFG), W E Heraeus-Stiftung, Land Niedersachsen and Stadt Gottingen

We hope the papers in this volume will reflect both the vitality and citement in the field of nuclear structure at this critical juncture in its history

vii

O R G A N I Z I N G C O M M I T T E E

Rick Casten (Yale)

Jan Jolie (Fribourg/Koln)

Ulrich Kneissl (Stuttgart)

Peter Lieb (Gottingen)

P Van Isacker (GANIL)

P Van Duppen (Leuven)

S Yates (Kentucky)

LOCAL O R G A N I Z I N G C O M M I T T E E

Peter Lieb (chairman)

Lucie Hamdi (symposium secretary)

CONTENTS

Preface v Committees and Sponsors vii

Peter von Brentano 1

Poem — "Peter von Brentano" 5

Walter Greiner

Symposium Photographs 9

Papers 23

A Arima, N Yoshinaga and Y M Zhao

Renormalization of One-Particle Moments Due to Core * 31

Polarization — Drip Line Nuclei vs /^-Stable Nuclei

I Hamamoto

New Class of Dynamic Symmetries 43

F Iachello

Real Photon Scattering Close to the Neutron Threshold 55

A Zilges, T Hartmann, P Mohr, K Vogt and S Volz

E l Two-Photon Excitations in Nuclei Near Shell Closures 61

H H Pitz

Shape Changes and Coexistence in the Neutron-Rich A = 100 67

Mass Region

J L Durell, A G Smith and W Urban

E A Stefanova, R Schwengner, M Danchev, G Rainovski,

D L Balabanski, M Axiotis, G de Angelis, M Djongolov,

F Donau, A Gadea, E Galindo, D J Hartley, A Jungclaus,

Th Kroll, T Kutsarova, K P Lieb, N Marginean,

L L Riedinger, K D Schilling, J Eberth, O Thelen,

C A Ur, A Wagner and O Zeidan

Decay Out of a Superdeformed Band 79

H A Weidenmiiller

The Special Nuclear Structure of the Te Isotopes 89

T von Egidy, H.-F Wirth, I Tomandl, J Honzdtko,

V Bondarenko, D Bucurescu, Y Eisermann, G Graw

and R Hertenberger

S W Yates, P E Garrett, N Warr and M Kadi

Structure of Elementary Matter: Superheavies, Hypermatter 105

AB-Initio No-Core Shell Model 149

B R Barrett, P Navratil, J P Vary and W E Ormand

Randomly Interacting Bosons, Mean-Fields and L = 0 155

Ground States

R Bijker and A Frank

D Rudolph, C Andreoiu, J Ekman, C Fahlander,

A Gadea and D G Sarantites

Coulomb Energy Differences: A Magnifying Glass to Probe 173

Nuclear Structure

S M Lenzi

Nuclear Structure of the A = 46, T = 1 Triplet 179

P E Garrett, W E Ormand, R W Bauer, J A Becker,

L A Bernstein, M Carpenter, R V F Janssens,

C J Lister, D Seweryniak, D Appelbe,

J A Cameron, D D Warner and E Tavukcu

Aspects of Nuclear Structure at Low Isospin 185

D D Warner

Generic and Non-Generic Features of Chaotic Systems: 197

Billiards and Nuclei

A Richter

Cluster Interpretation of Parity Splitting in Alternating 225

Parity Bands

T M Shneidman, G G Adamian, N V Antonenko,

R V Jolos and W Scheid

Towards Prolate Deformed Ground State in Polonium Nuclei: 231

In-Beam and Alpha-Decay Studies of 1 9 0>1 9 1po

A N Andreyev, M Huyse, K Van de Vel, P Van Duppen,

O Dorvaux, P Greenlees, K Helariutta, P Jones, R Julin,

S Juutinen, H Kankaanpdd, A Keenan, H Kettunen,

P Kuusiniemi, M Leino, M Muikku, P Nieminen,

P Rahkila, J Uusitalo, R Wyss, K Hauschild, A Hurstel,

Y Le Coz, R D Page, M Smith and K Eskola

Medium Heavy Nuclei with Z w N and Isospin Symmetry 237

P G Bizzeti

Isovector Valence Shell Excitations in Heavy Nuclei 243

N Pietralla

B(M1) Values in the Band-Crossing of Shears Bands in 1 9 7Pb 249

R Kriicken, J R Cooper, C W Beausang, J R Novak,

A Dewald, T Klug, G Kemper, P von Brentano,

M Carpenter and I Wiedenhover

A Jungclaus, B Binder, A Dietrich, T Hdrtlein,

H Bauer, Ch Gund, D Pansegrau, D Schwalm,

D Bazzacco, G de Angelis, E Farnea, A Gadea,

S Lunardi, D R Napoli, C Rossi-Alvarez, C Ur

and G B Hagemann

Structure Studies of Light Neutron-Rich Nuclei 261

U Datta Pramanik, T Aumann, D Cortina, H Emling,

H Geissel, M Hellstrom, R Holzmann, N Iwasa,

Y Leifels, G Munzenberg, M Rejmund, C Scheidenberger,

K Siimmerer, Th W Elze, A Gunschlofi, S Ilievski,

A Leistenschneider, K Boretzky, J V Kratz, R Kulessa,

E Lubkiewicz, E Wajda, W Walus, P Reiter and H Simon

Structure of Nuclei beyond the Dripline 267

A A Pasternak, A D Efimov, E 0 Podsvirova,

V M Mikhajlov, J Srebrny, T Morek , Ch Droste,

Y Sasaki, M Oshima, S Juutinen and G B Hagemann

The Development of Better Gamma-Ray Detector Arrays 287

D Bazzacco

The Status of the EXOGAM Spectrometer 293

J Simpson

Prom Euroball to Gamma-Ray Tracking Arrays — 299

New Developments in Ge Detector Technologies

J Eberth, G Pascovici, H G Thomas, N Warr

and D Weifihaar

Applications of High Resolution Gamma Spectroscopy in 305

Low Energy Nuclear Structure Research

H G Borner, M Jentschel and P Mutti

Lifetime Measurements with the Euroball Spectrometer 311

A Dewald, G Kemper, R Peusquens, A Fitzler,

S Kasemann, I Wiedenhover, K O Zell, P von Brentano,

H Hubel, S Chmel, A Gorgen, D Bazzacco,

R Venturelli, S Lunardi, C Rossi-Alvarez,

C M Petrache, D R Napoli, F Hannachi, A Lopez-Martens,

R Kriicken, J R Cooper, R M Clark, M A Deleplanque,

P Fallon, I Y Lee, A O Macchiavelli and F S Stephens

Light Neutron-Rich Exotic Nuclei 317

T Glasmacher

D L Balabanski, M Danchev, D J Hartley,

L L Riedinger, O Zeidan, J.-Y Zhang, C J Barton,

C W Beausang, M A Caprio, R F Casten,

J R Cooper, A A Hecht, R Kruecken, J R Novak,

N V Zamfir and K E Zyromski

An IBM-4 Like Model for the Calculations of JV = Z 327

Nuclear Binding Energies

E Baldini-Neto and C L Lima

Neutron Radiative Capture to Discrete States: Model Calculations 329

E Betdk, A Likar, F Cvelbar and T Vidmar

Interacting Boson Fermion Fermion Model Description of 331

Proton Rich Odd-Odd Pr Nuclei

S Brant

The New Form of Representation of a Spectrum of 7-Radiation 333

T V Chuvilskaya and Y G Seleznev

Clusterization and Composite Symmetries 337

J Cseh

Microscopic and Self-Consistent Study of Scissor and 339

Hexadecapole Modes

H Dancer, M Girod and J F Berger

An Alternative Approach to Shell Model Calculations 341

in the Mass Region ~ 150

P Das

Recent Results from the Mistral Mass Measurement 343

Program at Isolde

M de Saint Simon, G Audi, H Doubre, C Gaulard,

S Henry, D Lunney, C Monsanglant, C Thibault,

C Toader, N Vieira, G Bollen and C Borcea

and the ISOLDE Collaboration

Changes in Neutron Shell Closures Far from Stability Line 345

Z Dlouhy

Coherent Pion Production as Virtual Pion Scattering 347

V F Dmitriev and M A Kagarlis

Nuclear Structure of the N = Z Odd-Odd Nuclei around 349

N = 28 Closed Shell Interpreted with IBFFM

E Dragulescu

C Fransen, A Dewald, A Gade, J Jolie, U Kneissl,

N Pietralla, N Warr, V Werner and S W Yates

A Gade, I Wiedenhover and A Gelberg

Coincidence Lifetime-Measurements in 101Ag 355

E Galindo, M Hausmann, A Jungclaus, K P Lieb,

G A Mutter, O Yordanov, A Algora, G de Angelis,

P G Bizzeti, F Brandolini, A Dewald, C Fahlander,

A Gadea, M G or ska, H Grawe, T Martinez, D N Napoli,

R Peusquens, M de Poli and H Tiesler

Gyromagnetic Factors of Isomers in the Neutron-Rich 357

N = 40 Region: The Case of 6 9Cu

G Georgiev, G Neyens, D L Balabanski, C Bingham,

C Borcea, N Coulier, R Coussement, J M Daugas,

G Defrance, G Gold-ring, M Gdrska, H Grawe,

R Grzywacz, M Hass, M Lewitowicz, H Mach, I Matea,

F de Oliveira Santos, R D Page, M Pfiitzner,

Y E Penionzkevich, Z Podolydk, P H Regan,

K Rykaczewski, M Sawicka, N A Smirnova, Y Sobolev,

M Stanoiu, S Teughels and K Vyvey

Cross Section Measurements of (p, 7)-Reactions Relevant 359

to the Nucleosynthetic p-Process

S Harissopulos, P Demetriou, M Kokkoris,

S Galanopoulos, P Tsagari, E Skreti, T Paradellis,

R Kunz, J W Hammer, E Somorjai, G Gyiirky and Z Fiilop

Big Bang Entropy 361

G S Ioannidis and C Syros

A Scissors-Like Excitation on the Quadrupole Vibrational 363

State in 88Sr

L Kaubler, H Schnare, R Schwengner, H Prade,

F Donau, E Grosse, K D Schilling, A Wagner

and the Kdin-Darmstadt-Sofia Collaboration

H Klein, C Fransen and N Pietralla

Energy and Angular Distributions in the Reaction of 367

6He Photodisintegration

Y A Lashko and G F Filippov

Correlation between Cluster Systems: A Supersymmetric Approach 369

G Levai

Proton versus Neutron Excitations in the High-Spin 371 Spectrum of 102Cd

K P Lieb, D Kast, A Jungclaus, I P Johnstone,

G de Angelis, P G Bizzeti, A Dewald, C Fahlander,

M Gorska, H Grawe, R Peusquens, M de Poli

and H Tiesler

R M Lieder, H Brands, W Gast, H M Jager,

L Mihailescu, T Rzgca-Urban, Z Marcinkowska,

W Urban, T Morek, C Droste, S Chmel, D Bazzacco,

G Falconi, R Menagazzo, S Lunardi, C R Alvarez,

G de Angelis, E Farnea, A Gadea, D Napoli, Z Podolyak

and T Venkova

Influence of Quadrupole Deformation on M l Transitions 377

in Odd-Odd N = Z Nuclei

A F Lisetskiy, A Gelberg, N Pietralla and R V Jolos

Time-Delayed Coincidence Methods: The Interpretation of the

1.76 fis Isomer in 7 2Cu

H Mach, M Lewitowicz, M Stanoiu, F Becker,

J Blomqvist, M J G Borge, R Boutami, B Cederwall,

Z Dlouhy, B Fogelberg, L M Fraile, G Georgiev,

H Grawe, R Grzywacz, P I Johansson, W Klamra,

S Lukyanov, M Mineva, J Mrazek, G Neyens,

F de Oliveira Santos, M Pfiitzner, Y E Penionzhkevich,

E Ramstrom and M Sawicka

Isomers in the Vicinity of 132Sn Produced by In-Flight Fission of 2 3 8U 381

M N Mineva and the GSI Isomer Collaboration

Fine Structure of Rotational Bands and Quadrupole-Octupole 383

Collectivity in Heavy Nuclei

N Minkov, S B Drenska, P P Raychev and D Bonatsos

Competing Collective and Quasiparticle Structures in the 385 Transitional Nucleus 1 0 4Cd

G A Mutter, E Galindo, M Hausmann, A Jungclaus,

D East, K P Lieb, O Yordanov, A Algora,

G de Angelis, P G Bizzeti, F Brandolini,

S Brant, A Dewald, C Fahlander, A Gadea,

M Gorska, H Grawe, T Martinez, D N Napoli,

R Peusquens, M de Poli and H Tiesler

Phase Instabilities in Nuclear Matter and Droplet Formation 387

R Ogul and U Atav

Investigation of Two-Body Relaxation Times in Heated Nuclei 389

V A Plujko

Competition between Octupole and Shell Model States near 391

the Doubly Closed 1 4 6Gd

Z Podolydk, P G Bizzeti, A M Bizzeti-Sona, A Gadea,

S Lunardi, D Bazzacco, A Dewald, A Algora,

G de Angelis, M de Poli, E Farnea, D R Kasemann,

T Klug, T Kroll, S Lenzi, T Martinez, D R Napoli,

C M Petrache, R Peusquens, C Rossi Alvarez, C A Ur,

P Kleinheinz and J Blomqvist

Attenuation of the Intensity within Superdeformed Bands 393

A J Sargeant, M S Hussein, M P Pato, M Ueda

and N Takigawa

P Sarriguren, E Moya de Guerra and A Escuderos

Transition Strengths in Magnetic Dipole Bands in 397

8 2Rb, 8 3Rb and 8 4Rb

R Schwengner, G Rainovski, H Schnare, A Wagner,

F Donau, M Hausmann, O Iordanov, A Jungclaus,

K P Lieb, D R Napoli, G de Angelis, M Axiotis,

N Marginean, F Brandolini and C R Alvarez

Algebraic Approach to Multiphoton Excitations in 401

Near Spherical Nuclei

N A Smirnova, N Pietralla, T Mizusaki

and P Van hacker

The Pseudo-Spin Symmetry and Spin Symmetry in the 403

Relativistic Mean-Field with Deformed Potential

Study of the Quantum Number-Projected GCM 409

K Enami, K Tanabe and N Yoshinaga

Astrophysical S-Factors from Peripheral Transfer Reaction 411

with Radioactive Beams

L Trache, A Azhari, C A Gagliardi,

A M Mukhamedzhanov, X D Tang, R E Tribble

and F Carstoiu

The Scissors Mode near Shell Closures 413

P von Neumann-Cosel, A A Kuliev, A Richter

and C Salamov

Quadrupole Shape Invariants and Simple E2-Relations in 415

the Q-Phonon Scheme

V Werner and R V Jolos

Density and Energy Dependent Relativistic Mean Field 417

Approach for Nuclear Structure and Reactions

S Typel, T V Chossy, W Stocker and H H Wolter

Lifetime Measurements of a Magnetic Shears Band in 104 In

0 Yor3Wnovy~E,-Galindo, M Hausmann, A Jungclaus,

G A Miiller, K P Lieb, F Brandolini, D Napoli,

A Algora, T Martinez, A Gadea and M G or ska

Symposium Program

List of Participants

Author Index

PETER VON BRENTANO

This page is intentionally left blank

Peter von Brentano

4

Peter von Brentano

KiiBnacht in der Schweiz

war sein Geburtsort,

und fiir jeden der's nicht weifi:

Peters Familie lebte in Emigration dort

Doch bald nachdem der Krieg voriiber

gingen Brentanos nach Hause wieder,

und das war Wiesbaden in Hessen

wo Peter wurd' gepragt; er hat's nicht vergessen

Als Rennfahrer versucht er sich,

drehte Stiirze ganz fiirchterlich

Er war, ihr sollt's erfahren

'ne Art Schumi in jenen Jahren

Lieber Peter, zu Deinem Geburtstag gebiihrt sich's,

dafi ich Dich besinge dichterisch,

denn wir beide waren zusammen, s'ist wahr

an Goethes Universitat die ersten Jahr

Bei Cerny und Danzer horten wir Physik

Hund war im Gehen, und so betrieben wir Mathematik

Moufang, Franz und Reinhold Baer, ihr sollt es wissen

gaben uns Fundamente, die wir mochten nicht missen

Wir waren dort ein interessanter Club - hort zu

die Kegel-Briider, der Liineburg, der Peter und ich gehorte auch dazu Wir alle eiferten um die Wette,

und jeder fiir sich ging dann eigene Wege

Auch Reinhard Selten ist nicht zu vergessen:

Als Mathematiker war er von der Wirtschaft besessen

und arbeitete mit viel Fleifi

bis hin zum Wirtschaftsnobelpreis

Peter trug d a m a l s Jacken viel zu weit

und Hosen viel zu breit

gestiitzt durch Hosentrager

'ne tolle Personlichkeit, der Peter!

Nach dem Vordiplom h a t ' ich ein anderes Ziel:

uber D a r m s t a d t war's Freiburg, wo es mir gefiel

Doch Peter blieb bis zum Diplom

bei Schopper, d a n n ging a u d i er davon

Wie ich ging er nach Siiden,

in Heidelberg fand er seinen Frieden

A m dortigen Max Planck I n s t i t u t

ging es ihm recht gut

Gentner und Jensen, ich werdet es wissen:

Das Schalenmodell lafit griifien

Die Kernspektroskopie gefiel

und war fortan sein Ziel

Heidelberg war besonders b e d e u t s a m :

Peter war dort nicht m e h r einsam

Brigitte m i t ihrem C h a r m

u m a r m t e ihn, u n d sein Herz wurde w a r m

Brigitte, bekannt als Tremezza

in kiinstlerischen Kreisen,

schenkte ihm Herz und Ring d a

und liefi' beide fur's Leben z u s a m m e n schweifien

Obwohl er h a t t e zwei linke Hande,

fesselten ihn in Frankfurt und Heidelberg die E x p e r i m e n t e

Ich kannte ihn sehr m a t h e m a t i s c h fixiert,

u m so mehr h a t mich seine Entscheidung konsterniert

Doch er ging seinen Weg zielgerecht weiter

nach Seattle zu Blair u n d auch in Texas fand' er's heiter

Im grofien Land Amerika

Brentanos fuhren Cadillac

6

und hatten ihre Freud'

an diesem groBen Gehaus, wie viele Leut'

Peter kam nach Heidelberg zuriick

als Kernstruktur- und Tandem-Spezialist

Ich wollte ihn gerne in Frankfurt halten,

um mitzuhelfen die GSI zu gestalten

Doch er zog zum Tandem in Koln am Rhein

das fand ich damals gar nicht fein

Dort entwickelte er sich immer energischer

zum weltbekannten Kernspektroskopiker,

freilich gepaart mit theoretischen Interpretationen

von wechselwirkenden Bosonen oder-mehr physikalisch-von Rotation und Vibration

Eine Schaar von erstklassigen Schiilern, er hort's bestimmt gern,

haben bei ihm ihr Handwerk gelernt

und sind in die Welt hinausgegangen,

wo sie wurden richtige kernphysikalische Mannen

Du kannst stolz sein, lieber Peter, auf das Erreichte

natiirlich war's nicht so, ware nicht Brigitte an Deiner Seite

immer treu, Dich unterstiitzend und stimulierend, s'ist wahr,

wie es eben ist bei zwei Menschen in Liebe ein Paar

Du bist nicht am Ende, merk' es Dir!

Noch vieles kannst Du bewirken fur uns alle hier

Kannst schreiben ein Buch voller Wissenschaft

oder die Geschichte der Physik, die Du mitgestaltet hast

Noch mehr kann man sich ausdenken,

doch laB' ich's dabei bewenden

und wiinsch', Brigitte und Peter, auf Euren zukiinftigen Wegen

von ganzem Herzen Gottes Segen!

Walter Greiner

M

Peter von Brentano

This page is intentionally left blank

SYMPOSIUM PHOTOGRAPHS

This page is intentionally left blank

12

y

$

# ,

14

16

18

:4

^

20