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Title: Test of the critical point symmetry X(5) in neutron deficient osmium isotopes at A{approx_equal}180

Abstract

The energy spectra and relative transition rates of 176,178,180Os were found to be very similar to the values calculated in the framework of the critical point symmetry X(5). In order to enable more stringent tests, including also absolute transition probabilities, two coincidence RDDS lifetime measurements were performed at the Laboratori Nazionali di Legnaro with the GASP spectrometer using the 152,154Sm(29Si,5n)176,178Os reactions. The deduced transition quadrupole moments in 178Os agree well with the X(5) predictions. For 176Os only preliminary results were obtained so far. These preliminary data support an X(5) like structure also in the case of 176Os. The experimental data of both nuclei are compared to calculations in the framework of the interacting boson model (IBM) and of the general collective model (GCM)

Authors:
 [1]; ; ; ; ; ; ;  [2];  [3]; ; ; ; ;  [4]; ; ; ; ; ;  [5]
  1. Institut fuer Kernphysik der Universitaet zu Koeln, Zuelpicher Strasse 77, 50937 Cologne (Germany)
  2. Zuelpicher Strasse 77, 50937 Cologne (Germany)
  3. Institute for Nuclear Research and Nuclear Energy Sofia, Sofia (Bulgaria)
  4. INFN Sezione Padova, Padova (Italy)
  5. INFN, Laboratori Nazionali di Legnaro, Legnaro (Italy) (and others)
Publication Date:
OSTI Identifier:
20798530
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 831; Journal Issue: 1; Conference: International conference on frontiers in nuclear structure, astrophysics, and reactions - FINUSTAR, Isle of Kos (Greece), 12-17 Sep 2005; Other Information: DOI: 10.1063/1.2200924; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; APPROXIMATIONS; COLLECTIVE MODEL; ENERGY SPECTRA; INTERACTING BOSON MODEL; LIFETIME; NEUTRON-DEFICIENT ISOTOPES; OSMIUM 176; OSMIUM 178; PROBABILITY; QUADRUPOLE MOMENTS; SAMARIUM 152 TARGET; SAMARIUM 154 TARGET; SILICON 29; SILICON 29 REACTIONS; SYMMETRY

Citation Formats

Dewald, A., Moeller, O., Melon, B., Pissulla, T., Saha, B., Heinze, S., Jolie, J., Zell, K. O., Petkov, P., Bazzacco, D., Lunardi, S., Ur, C. A., Farnea, E., Menegazzo, R., De Angelis, G., Tonev, D., Napoli, D. R., Marginean, N., Martinez, T., and Axiotis, M.. Test of the critical point symmetry X(5) in neutron deficient osmium isotopes at A{approx_equal}180. United States: N. p., 2006. Web. doi:10.1063/1.2200924.
Dewald, A., Moeller, O., Melon, B., Pissulla, T., Saha, B., Heinze, S., Jolie, J., Zell, K. O., Petkov, P., Bazzacco, D., Lunardi, S., Ur, C. A., Farnea, E., Menegazzo, R., De Angelis, G., Tonev, D., Napoli, D. R., Marginean, N., Martinez, T., & Axiotis, M.. Test of the critical point symmetry X(5) in neutron deficient osmium isotopes at A{approx_equal}180. United States. doi:10.1063/1.2200924.
Dewald, A., Moeller, O., Melon, B., Pissulla, T., Saha, B., Heinze, S., Jolie, J., Zell, K. O., Petkov, P., Bazzacco, D., Lunardi, S., Ur, C. A., Farnea, E., Menegazzo, R., De Angelis, G., Tonev, D., Napoli, D. R., Marginean, N., Martinez, T., and Axiotis, M.. Wed . "Test of the critical point symmetry X(5) in neutron deficient osmium isotopes at A{approx_equal}180". United States. doi:10.1063/1.2200924.
@article{osti_20798530,
title = {Test of the critical point symmetry X(5) in neutron deficient osmium isotopes at A{approx_equal}180},
author = {Dewald, A. and Moeller, O. and Melon, B. and Pissulla, T. and Saha, B. and Heinze, S. and Jolie, J. and Zell, K. O. and Petkov, P. and Bazzacco, D. and Lunardi, S. and Ur, C. A. and Farnea, E. and Menegazzo, R. and De Angelis, G. and Tonev, D. and Napoli, D. R. and Marginean, N. and Martinez, T. and Axiotis, M.},
abstractNote = {The energy spectra and relative transition rates of 176,178,180Os were found to be very similar to the values calculated in the framework of the critical point symmetry X(5). In order to enable more stringent tests, including also absolute transition probabilities, two coincidence RDDS lifetime measurements were performed at the Laboratori Nazionali di Legnaro with the GASP spectrometer using the 152,154Sm(29Si,5n)176,178Os reactions. The deduced transition quadrupole moments in 178Os agree well with the X(5) predictions. For 176Os only preliminary results were obtained so far. These preliminary data support an X(5) like structure also in the case of 176Os. The experimental data of both nuclei are compared to calculations in the framework of the interacting boson model (IBM) and of the general collective model (GCM)},
doi = {10.1063/1.2200924},
journal = {AIP Conference Proceedings},
number = 1,
volume = 831,
place = {United States},
year = {Wed Apr 26 00:00:00 EDT 2006},
month = {Wed Apr 26 00:00:00 EDT 2006}
}