In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL

Journal Article · Thu Sep 02 00:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59554· OSTI ID:21208223

Azaiez, F; Belleguic, M; Sorlin, O; Leenhardt, S; Bourgeois, C; Donzaud, C; Duprat, J; Guillemaud-Mueller, D; Mueller, A C; Pougheon, F; Saint-Laurent, M G; Lopez, M J; Achouri, N L; Daugas, J M; Lewitowicz, M; Mittig, W; De Oliveira, F; Roussel-Chomaz, P; Savajols, H; Penionzhkevich, Yu-E ^[1] ; Caen, GANIL ^[2]; Dubna, FLNR-KINR ^[3]; Bucharest, IAP ^[4]; Caen, LPC ^[2]; Orsay, CSNSM ^[5]; DAPNIA-CEA, ^[5]; DAM-CEA, ^[5]; RPI-REZ, ^[6]; Darmstadt, GSI ^[7]

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1. IPN Orsay (France)
2. France; France
3. Russian Federation
4. Romania
5. France
6. Czech Republic
7. Germany; and others

The structure of nuclei far from stability can be investigated by means of in-beam gamma spectroscopy using both stable and radioactive beams. A {gamma}-array consisting of BaF2 and Ge detectors have been used at GANIL in order to perform two of such experiments: i) Secondary beams of neutron-rich Ge, Zn and Ni isotopes around N=40 were produced from the fragmentation of a primary {sup 86}Kr beam, and analyzed by means of the LISE3 spectrometer. For the transitions between the O{sup +} ground state and the first 2{sup +} state, B(E2) values have been extracted from Coulomb excitation cross-section measurement..Some of the obtained results related to the effectiveness of the N=40 spherical sub-shell closure as well as future improvements of the quality of the data are discussed. ii) In-beam {gamma}-spectroscopy of neutron-rich nuclei around {sup 32}Mg produced by fragmentation of {sup 36}S have been recently performed. Gamma decay of relatively higher excited states have been measured in a large number of exotic light nuclei. Preliminary results obtained in a number of even-even nuclei around N=20, such as {sup 20,22}O, {sup 26,28}Ne and {sup 30,32}Mg are presented.

• OSTI ID: 21208223
• Journal Information: AIP Conference Proceedings, Vol. 481, Issue 1; Conference: Nuclear structure 98 conference, Gatlinburg, TN (United States), 10-15 Aug 1998; Other Information: DOI: 10.1063/1.59554; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COULOMB EXCITATION
CROSS SECTIONS
EXCITED STATES
GAMMA DECAY
GAMMA SPECTROSCOPY
GANIL CYCLOTRON
GE SEMICONDUCTOR DETECTORS
GROUND STATES
KRYPTON 86
MAGNESIUM 32
NEON 28
NEUTRON-RICH ISOTOPES
NITROGEN 20
NUCLEAR FRAGMENTATION
NUCLEAR STRUCTURE
OXYGEN 20
OXYGEN 22
RADIOACTIVE ION BEAMS
SHELL MODELS