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

Abstract

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.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1] more »;  [2];  [3];  [4];  [2];  [5];  [5];  [5];  [6];  [7] « less
  1. IPN Orsay (France)
  2. (France) (France)
  3. (Russian Federation)
  4. (Romania)
  5. (France)
  6. (Czech Republic)
  7. (Germany) (and others)
Publication Date:
OSTI Identifier:
21208223
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 481; Journal 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); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

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., GANIL Caen, FLNR-KINR Dubna, IAP Bucharest, LPC Caen, CSNSM Orsay, DAPNIA-CEA, DAM-CEA, RPI-REZ, and GSI Darmstadt. In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL. United States: N. p., 1999. Web. doi:10.1063/1.59554.
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., GANIL Caen, FLNR-KINR Dubna, IAP Bucharest, LPC Caen, CSNSM Orsay, DAPNIA-CEA, DAM-CEA, RPI-REZ, & GSI Darmstadt. In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL. United States. doi:10.1063/1.59554.
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., GANIL Caen, FLNR-KINR Dubna, IAP Bucharest, LPC Caen, CSNSM Orsay, DAPNIA-CEA, DAM-CEA, RPI-REZ, and GSI Darmstadt. Thu . "In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL". United States. doi:10.1063/1.59554.
@article{osti_21208223,
title = {In-beam gamma spectroscopy of very neutron-rich nuclei at GANIL},
author = {Azaiez, F. and Belleguic, M. and Sorlin, O. and Leenhardt, S. and Bourgeois, C. and Donzaud, C. and Duprat, J. and Guillemaud-Mueller, D. and Mueller, A. C. and Pougheon, F. and Saint-Laurent, M. G. and Lopez, M. J. and Achouri, N. L. and Daugas, J. M. and Lewitowicz, M. and Mittig, W. and De Oliveira, F. and Roussel-Chomaz, P. and Savajols, H. and Penionzhkevich, Yu-E. and GANIL Caen and FLNR-KINR Dubna and IAP Bucharest and LPC Caen and CSNSM Orsay and DAPNIA-CEA and DAM-CEA and RPI-REZ and GSI Darmstadt},
abstractNote = {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.},
doi = {10.1063/1.59554},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 481,
place = {United States},
year = {1999},
month = {9}
}