Dealing with contaminants in Coulomb excitation of radioactive beams

As a subset of radioactive beams, isomer beams open up the dimensions of excitation energy and angular momentum. The problem of isomer decay rates is briefly presented, as they are not yet well understood. The use of isomer beams for nuclear structure investigations is reviewed, using examples related to exotic decay modes, charge radii, and Coulomb excitation. There are also unique possibilities for the study of induced electromagnetic depopulation. A key aspect is beam purification, for which different techniques are discussed.

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EXPERIMENTAL MEASUREMENT OF THE DEFORMATION THROUGH THE ELECTROMAGNETIC PROBE: SHAPE COEXISTENCE IN EXOTIC KR AND SR ISOTOPES

International Journal of Modern Physics E ◽

10.1142/s0218301311017806 ◽

2011 ◽

Vol 20 (02) ◽

pp. 415-421 ◽

Cited By ~ 2

Author(s):

E. CLÉMENT ◽

G. DE FRANCE ◽

J.M. CASANDJIAN ◽

A. GÖRGEN ◽

W. KORTEN ◽

...

Keyword(s):

Coulomb Excitation ◽

Theoretical Calculations ◽

Effective Interaction ◽

Shape Coexistence ◽

Quadrupole Moments ◽

Radioactive Beams ◽

Hartree Fock ◽

Electromagnetic Probe ◽

Model Configuration ◽

Band Mixing

The light krypton isotopes were studied in a series of Coulomb excitation experiments using radioactive beams at GANIL. The static quadrupole moments found in these experiments give firm experimental evidence for the shape coexistence scenario that is based on theoretical calculations and on the systematics of low-lying excited 0+ states. The experimental results are interpreted within a phenomenological two-band mixing model. Configuration mixing calculations based on triaxial Hartree-Fock-Bogolyubov calculations with the Gogny D1S effective interaction have been performed and compared to experimental data.

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The Application of the High-Velocity Transient Field for the g(2^+_1) Measurement in the Neutron-rich 72Zn

HNPS Proceedings ◽

10.12681/hnps.2485 ◽

2013 ◽

Vol 20 ◽

pp. 44

Author(s):

T. J. Mertzimekis ◽

For the GANIL E535 Collaboration

Keyword(s):

Magnetic Fields ◽

Hyperfine Field ◽

Magnetic Moment ◽

High Velocity ◽

Coulomb Excitation ◽

Radioactive Beam ◽

Transient Field ◽

Radioactive Beams ◽

Hyperfine Fields ◽

Radioactive Beam Facilities

The first successful application of the recently developed High-Velocity Transient Field Technique (HVTF) on European soil was performed at GANIL. HVTF is an extension of the well established Transient Field (TF) technique, which utilizes immense hyperfine magnetic fields (10-100 kG) capable of inducing a spin precession of an excited nucleus. With the advent of radioactive beams, detailed explorations of such hyperfine fields have been carried out at larger-than-usual ion velocities in an effort to introduce the technique to large radioactive beam facilities. The neutron-rich radioactive 72Zn isotope is an ideal playground for HVTF. Coulomb excitation populated the 2^+_1 state in 72Zn nuclei, produced as fast secondary beams at GANIL and INFN-LNS, aiming to (a) calibrate the hyperfine field at these beam energies and (b) measure the g factor of 2^+_1 directly. The outcome of these experiments are reported and the application of the HVTF to magnetic-moment measurements are briefly described.

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Coulomb excitation and transfer reactions with neutron-rich radioactive beams

The European Physical Journal A ◽

10.1140/epjad/i2005-06-205-y ◽

2005 ◽

Vol 25 (S1) ◽

pp. 383-387 ◽

Cited By ~ 17

Author(s):

D. C. Radford ◽

C. Baktash ◽

C. J. Barton ◽

J. Batchelder ◽

J. R. Beene ◽

...

Keyword(s):

Coulomb Excitation ◽

Transfer Reactions ◽

Radioactive Beams

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Coulomb excitation of odd- A neutron-rich radioactive beams

The European Physical Journal A ◽

10.1140/epjad/i2005-06-144-7 ◽

2005 ◽

Vol 25 (S1) ◽

pp. 395-396 ◽

Cited By ~ 2

Author(s):

C. -H. Yu ◽

C. Baktash ◽

J. C. Batchelder ◽

J. R. Beene ◽

C. Bingham ◽

...

Keyword(s):

Coulomb Excitation ◽

Radioactive Beams

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SHELL STRUCTURE, COLLECTIVITY AND NUCLEAR SHAPES — RISING IN-BEAM EXPERIMENTS AT RELATIVISTIC ENERGIES

International Journal of Modern Physics E ◽

10.1142/s0218301306005083 ◽

2006 ◽

Vol 15 (07) ◽

pp. 1495-1503

Author(s):

◽

PIETER DOORNENBAL

Keyword(s):

High Resolution ◽

Shell Model ◽

Nuclear Structure ◽

Shell Structure ◽

Mirror Symmetry ◽

Coulomb Excitation ◽

Radioactive Beams ◽

Model Calculations ◽

Electromagnetic Transition ◽

Γ Ray

The RISING fast beam campaign aims at high resolution γ-ray spectroscopy experiments with relativistic radioactive beams at GSI. The secondary beams produced by fragmentation or fission are used for Coulomb excitation or secondary fragmentation experiments to perform studies of nuclei far off stability. The physics phenomena studied with this method include nuclear structure experiments targeting at the evolution of shell structure toward the drip lines, mirror symmetry, collectivity and electromagnetic transition strengths. Example results of this fast beam campaign are presented and compared to various shell model calculations and nuclear structure models.

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