The 4th International Conference on Exotic Nuclei and Atomic Masses (eBook)

ENAM2004 Organization 4
ENAM2004 Sponsors 5
Contents 6
List of participants 18
Preface 36
1 Masses 38
1.1 Overview 38
Latest trends in the ever-surprising field of mass measurements 39
Atomic Mass Evaluation 2003 45
1.2 Mass measurements 50
Recent high-precision mass measurements with the Penning trap spectrometer ISOLTRAP 51
New mass measurements at the neutron drip-line 56
Ion manipulation and precision measurements at JYFLTRAP 60
Mass measurement of short-lived halo nuclides 64
Is N = 40 magic? An analysis of ISOLTRAP mass measurements 66
Extending the mass backbone” to short-lived nuclides with ISOLTRAP 68
A MISTRAL spectrometer accoutrement for the study of exotic nuclides 70
Mass measurement on the rp-process waiting point 72Kr 73
Atomic mass ratios for some stable isotopes of platinum relative to 197Au 76
1.3 Traps 78
The ion-trap facility SHIPTRAP 79
Precision experiments with rare isotopes with LEBIT at MSU 81
TITAN project status report and a proposal for a new cooling method of highly charged ions 83
Development of a Penning trap system in Munich 87
The LEBIT 9.4 T Penning trap system 89
Commissioning of the ion beam buncher and cooler for LEBIT 91
A high-current EBIT for charge-breeding of radionuclides for the TITAN spectrometer 93
FT-ICR: A non-destructive detection for on-line mass measurements at SHIPTRAP 95
Commissioning and first on-line test of the new ISOLTRAP control system 97
1.4 Mass modeling 99
Recent progress in mass predictions 100
Bounds on the presence of quantum chaos in nuclear masses 104
Symmetry energies and the curvature of the nuclear mass surface 108
2 Radioactivity 110
2.1 Neutron-rich nuclei 110
ß-decay studies of neutron-rich nuclei 111
The structure of nuclei near 78Ni from isomer and decay studies 116
Beta-delayed . and neutron emission near the double shell closure at 78Ni 120
Exotic nuclei near 78Ni in a shell model approach 122
Beta decays of 8He, 9Li, and 9C 124
Halo neutrons and the ß-decay of 11Li 126
Voyage to the “Island of Inversion”: 29Na 127
New structure information on 30Mg, 31Mg and 32Mg 130
Observation of the 0+2 state in 44S 135
A novel way of doing decay spectroscopy at a radioactive ion beam facility 138
Structure of neutron-rich even-even 124,126Cd 140
Structure of doubly-even cadmium nuclei studied by ß- decay 142
New level information on Z = 51 isotopes, 111Sb60 and 134,135Sb83,84 144
On the structure of the anomalously low-lying 5/2+ state of 135Sb 146
Discovery of a new 2.3 s isomer in neutron-rich 174Tm 148
2.2 Proton-rich nuclei 150
Beta-delayed gamma and proton spectroscopy near the Z = N line 151
Study of the (21+) isomer in 94Ag 153
Beta-decay studies near 100Sn 156
Beta-decay spectroscopy of 103,105Sn 160
2.3 Proton emitters 163
Discovery of the new proton emitter 144Tm 164
Study of fine structure in the proton radioactivity of 146Tm 167
Study of the N = 77 odd- Z isotones near the proton- drip line 169
Recoil decay tagging study of 146Tm 172
Particle-core coupling in the transitional proton emitters 145,146,147Tm 175
Nuclear pairing and Coriolis effects in proton emitters 177
Two-proton emission 180
First observation of 54Zn and its decay by two-proton emission 184
Microscopic theory of the two-proton radioactivity 188
2.4 Alpha decay 191
Alpha-decay studies using the JYFL gas-filled recoil separator RITU 192
Decay studies of neutron-deficient odd-mass At and Bi isotopes 194
Alpha-decay study of 218U a search for the sub-shell closure at Z = 92
3 Moments and radii 198
3.1 Electromagnetic moments 198
Developments in laser spectroscopy at the Jyväskylä IGISOL 199
Laser and ß-NMR spectroscopy on neutron-rich magnesium isotopes 204
Measurement of the nuclear charge radii of 8,9Li 209
Effects of the pairing energy on nuclear charge radii 211
First g-factor measurement using a radioactive 76Kr beam 213
First nuclear moment measurement with radioactive beams by recoil-in-vacuum method: g-factor of the 2+1 state in 132Te 215
Anomalous magnetic moment of 9C and shell quenching in exotic nuclei 219
3.2 Nuclear matter distribution 223
Investigation of nuclear matter distribution of the neutron-rich He isotopes by proton elastic scattering at intermediate energies 224
Reaction cross-sections for stable nuclei and nucleon density distribution of proton drip-line nucleus 8B 226
Nucleon density distribution of proton drip-line nucleus 17Ne 229
Reaction cross-sections and reduced strong absorption radii of nuclei in the vicinity of closed shells N = 20 and N = 28 231
Anomalous behaviour of matter radii of proton-rich Ga, Ge, As,Se and Br nuclei 235
4 Reactions 239
4.1 Fusion 239
Fusion studies with RIBs 240
Sub-barrier fusion induced by neutron-rich radioactive 132Sn 246
Measurement of evaporation residue cross sections from reactions with radioactive neutron- rich beams 248
4.2 Direct reactions 250
First experiments on transfer with radioactive beams using the TIARA array 251
Spectroscopic factors in exotic nuclei from nucleon-knockout reactions 257
First experiment of 6He with a polarized proton target 260
Isobaric analog states of neutron-rich nuclei. Doppler shift as a measurement tool for resonance excitation functions 264
A new view to the structure of 19C 266
Reactions induced beyond the dripline at low energy by secondary beams 268
Study of the ground-state wave function of 6He via the6He(p, t)a transfer reaction 272
4.3 Reaction mechanism 275
Effect of halo structure on 11Be + 12C elastic scattering 276
Observation of pre-equilibrium alpha particles at extreme backward angles from 28Si + natSi and 28Si + 27Al reactions at E < 5 MeV/A
Yield of low-lying high-spin states at optimal charge-particle reactions 281
4.4 Techniques and detectors 283
Developing techniques to study A ~ 132 nuclei with ( d, p) reactions in inverse kinematics 284
MUST2: A new generation array for direct reaction studies 287
The EXODET apparatus: Features and first experimental results 289
4.5 Theory 291
Unbound exotic nuclei studied via projectile fragmentation reactions 292
Progress on reactions with exotic nuclei 294
Entrance channel dependence in compound nuclear reactions with loosely bound nuclei 297
5 Clusters and drip lines 300
5.1 Clustering 300
Cluster structure in stable and unstable nuclei 301
Multineutron clusters 307
New insights into the resonance states of 5H and 5He 310
5.2 Halo nuclei 316
Borromean nuclei and three-body resonances 317
Breakup reactions of halo nuclei 319
Observation of a two-proton halo in 17Ne 321
5.3 Drip lines and beyond 325
Remarks about the driplines 326
Discovery of 60Ge and 64Se 328
Studies of light neutron-rich nuclei near the drip line 332
One-neutron knockout of 23O 335
Inelastic proton scattering on 16C 339
Experimental evidence of a .(1d5/2)2 component to the 12Be ground state 341
Stability island near the neutron-rich 40O isotope 344
6 Excited states 346
6.1 Shell structure 346
Shell structure from 100Sn to 78Ni: Implications for nuclear astrophysics 347
News on mirror nuclei in the sd and fp shells 353
Study of single-particle states in 23F using proton transfer reaction 357
Single-neutron excitations in neutron-rich N = 51 nuclei 361
High-spin shape isomers and the nuclear Jahn-Teller effect 365
Identification of mixed-symmetry states in odd-A93Nb 367
6.2 Coulomb excitation of radioactive ion beams 370
Coulomb excitation and transfer reactions with neutron-rich radioactive beams 371
132Te and single-particle density-dependent pairing 376
Coulomb excitation measurements of transition strengths in the isotopes 132,134Sn 378
Coulomb excitation of odd-A neutron-rich radioactive beams 382
Coulomb excitation of neutron-rich beams at REX-ISOLDE 384
Spectroscopy on neutron-rich nuclei at RIKEN 390
Reduced transition probabilities for the first 2+ excited state in 46Cr, 50Fe, and 54Ni 396
Intermediate-energy Coulomb excitation of the neutron-rich Ge isotopes around N = 50 401
6.3 Deep inelastic collisions 404
First results of the CLARA-PRISMA setup installed at LNL 405
Multinucleon transfer reactions studied with the heavy-ion magnetic spectrometer PRISMA 411
Study of high-spin states in the 48Ca region by using secondary fusion reactions 413
Spectroscopy of Ne and Na isotopes: Preliminary results from a EUROBALL + Binary Reaction Spectrometer experiment 415
6.4 Collective excitations and shape coexistence 417
Ground-state properties and phase/shape transitions in the IBA 418
Chiral symmetry in odd-odd neutron-deficient Pr nuclei 420
Soft triaxial rotor in the vicinity of . = p/6 and its extensions 422
RDDS lifetime measurement with JUROGAM + RITU 424
Lifetime measurements and low-lying structure in 112Sn 426
Check for chirality in real nuclei 429
Probing the three shapes in 186Pb using in-beam .-ray spectroscopy 431
Systematics in the structure of low-lying, non-yrast band-head configurations of strongly deformed nuclei 433
A measure for triaxiality from K (shape) invariants 435
Alternative interpretation of E0 strengths in transitional regions 437
6.5 Structure of fission products 439
Soft chiral vibrations in 106Mo 440
Half-life measurement of excited states in neutron-rich nuclei 444
Investigations of short half-life states from SF of 252Cf 446
Identification of levels in 162,164Gd and decrease in moment of inertia between N = 98–100 448
Shape transitions and triaxiality in neutron-rich odd-mass Y and Nb isotopes 450
Unexpected rapid variations in odd-even level staggering in gamma- vibrational bands 452
7 Nuclear structure theory 454
7.1 Ab initio 454
Ab initio No-Core Shell Model —Recent results and future prospects 455
Ab initio no-core shell model calculations using realistic two- and three- body interactions 461
Ab initio coupled cluster calculations for nuclei using methods of quantum chemistry 465
Effective operators in the NCSM formalism 469
7.2 Shell model 471
Shell-model description of weakly bound and unbound nuclear states 472
Shell-model description of neutron-rich pf-shell nuclei with a new effective interaction GXPF1 478
Effects of the continuum coupling on spin-orbit splitting 482
Study of drip-line nuclei with a core plus multi-valence nucleon model 484
Wave function factorization of shell-model ground states 486
Shell model analysis of intruder states and high-K isomers in the fp shell 488
Extended pairing model revisited 490
Application of the extended pairing model to heavy isotopes 493
7.3 Mean field and beyond 495
Microscopic models for exotic nuclei 496
Breathing mode energy and nuclear matter incompressibility coefficient within relativistic and non- relativistic models 502
Unrestricted TDHF studies of nuclear response in the continuum 504
Self-consistent relativistic QRPA studies of soft modes and spin- isospin resonances in unstable nuclei 507
Deformations and electromagnetic moments of light exotic nuclei 511
Skyrme-QRPA calculations of multipole strength in exotic nuclei 515
On the non-unitarity of the Bogoliubov transformation due to the quasiparticle space truncation 517
2-D lattice HFB calculations for neutron-rich zirconium isotopes 519
Soft octupole vibrations on superdeformed states in nuclei around 40Ca suggested by Skyrme-HF and self-consistent RPA calculations 521
Collective path connecting the oblate and prolate local minima in proton-rich N = Z nuclei around 68Se 523
Light exotic nuclei studied with the parity-projected Hartree-Fock method 525
Using high-spin data to constrain spin-orbit term and spin-fields of Skyrme forces 527
TDHF studies with modern Skyrme forces 529
Relativistic mean-field models with medium-dependent meson- nucleon couplings 531
Microscopic structure of negative-parity vibrations built on superdeformed states in sulfur isotopes close to the neutron drip line 533
Cranking in isospace 535
Di-neutron correlations in medium-mass neutron-rich nuclei near the dripline 539
Large-scale HFB calculations for deformed nuclei with the exact particle number projection 542
Collective excitations induced by pairing anti-halo effect 544
Continuum effects on the pairing in neutron drip-line nuclei studied with the canonical- basis HFB method 546
Pairing effects on the collectivity of quadrupole states around 32Mg 548
8 Heavy elements 550
8.1 Structure and chemistry 550
Beyond darmstadtium —Status and perspectives of superheavy element research 551
Chemical properties of transactinides 557
New elements from Dubna 562
Random probability analysis of recent 48Ca experiments 568
In-beam and decay spectroscopy of transfermium elements 571
In-beam gamma-ray spectroscopy of 254No 577
Model of binding alpha-particles and applications to superheavy elements 580
Ground-state properties of superheavy elements in macroscopic- microscopic models 582
8.2 Production 584
Fusion hindrance and quasi-fission in 48Ca induced reactions 585
Entrance-channel potentials for hot fusion reactions 589
9 Nuclear astrophysics 591
9.1 Experiment 591
Amazing developments in nuclear astrophysics 592
Investigating the rp-process with the Canadian Penning trap mass spectrometer 598
r-process isotopes in the 132Sn region 602
The half-life of the doubly-magic r-process nucleus 78Ni 608
New 19Ne resonance observed using an exotic 18F beam 612
12C + 12C cross-section measurements at low energies 614
7Be breakup on heavy and light targets 616
Quasi-free 6Li(n, a)3H reaction at low energy from 2H break-up 618
9.2 Theory 620
Global microscopic models for r-process calculations 621
Shell-model applications in supernova physics 626
The Trojan-Horse method for nuclear astrophysics 632
Pycnonuclear reactions in dense stellar matter 636
A statistical spectroscopy approach for calculating nuclear level densities 640
10 Fundamental symmetries 642
Fundamental symmetries and interactions —Some aspects 643
Weak interaction symmetries with atom traps 650
Time-reversal violation in heavy octupole-deformed nuclei 655
Superallowed 0+ . 0+ ß decay and CKM unitarity: A newoverview including more exotic nuclei 659
Search for P-odd time reversal noninvariance in nuclear processes 663
Parity non-conservation in the .-decay of polarized 17/2- isomers in 93Tc 666
The LPCTrap for the measurement of the ß-. correlation in 6He 668
Alignment correlation term in mass A = 8 system and G- parity irregular term 671
11 Radioactive ion beam production and applications 673
11.1 Facilities and beams 673
Ion manipulation with cooled and bunched beams 674
Status of the RISING project at GSI 680
Recent highlights from ISOLDE@CERN 684
ISOL beams of neutron-rich oxygen isotopes 689
Radioactive Ion beams in Brazil (RIBRAS) 692
GANIL and the SPIRAL2 project 696
Recent developments of the radioactive beam preparation at REX- ISOLDE 698
Preparation of cooled and bunched ion beams at ISOLDE-CERN 701
Performance of IGISOL 3 703
Production of beams of neutron-rich nuclei between Ca and Ni using the ion- guide technique 706
LISE++ development: Application to projectile fission at relativistic energies 708
Exotic nuclei within the INFN-PI32 network 710
11.2 Applications 712
Spallation reactions for nuclear waste transmutation and production of radioactive nuclear beams 713
TARGISOL: An ISOL-database on the web 719
12 Conference summary 721
12.1 Neutron-rich nuclei 721
Concluding remarks of the ENAM’04 Conference 722
Identification of mixed-symmetry states in odd-A 93Nb 727
Author index 728