Evidence for octupole correlations in 124Ba, 125Ba

P. Mason; G. Benzoni; A. Bracco; F. Camera; B. Million; O. Wieland; S. Leoni; A.K. Singh; A. Al-Khatib; H. Hübel; P. Bringel; A. Burger; A. Neusser; G. Schonwasser; B.M. Nyako; J. Timar; A. Algora; Zs. Dombradi; J. Gal; G. Kalinka; J. Molnar; D. Sohler; L. Zolnai; K. Juhasz; G. B. Hagemann; C. R. Hansen; B. Herskind; G. Sletten; M. Kmiecik; A. Maj; J. Styczen; K. Zuber; F. Azaiez; K. Hauschild; A. Korichi; A. Lopez-Martens; J. Roccaz; S. Siem; F. Hannachi; J.N. Scheurer; P. Bednarczyk; T. Byrski; D. Curien; O. Dorvaux; G. Duchêne; B.J.P. Gall; F. Khalfallah; I. Piqueras; J. Robin; S. B. Patel; O. A. Evans; G. Rainovski; C. M. Petrache; D. Petrache; G. La Rana; R. Moro; G. De Angelis; P. Falon; I.Y. Lee; J. C. Lisle; B. Cederwall; K. Lagergen; R. M. Lieder; E. Podsvirova; W. Gast; H. Jager; N. Redon; A. Gorgen

HAL : in2p3-00025456, version 1

DOI : 10.1103/PhysRevC.72.064315

Fiche détaillée

Récupérer au format

Physical Review C 72 (2005) 064315

Evidence for octupole correlations in 124Ba, 125Ba

P. Mason, G. Benzoni, A. Bracco, F. Camera, B. Million, O. Wieland, S. Leoni, A.K. Singh, A. Al-Khatib, H. Hübel, P. Bringel, A. Burger, A. Neusser, G. Schonwasser, B.M. Nyako, J. Timar, A. Algora, Zs. Dombradi, J. Gal, G. Kalinka, J. Molnar, D. Sohler, L. Zolnai, K. Juhasz, G. B. Hagemann, C. R. Hansen, B. Herskind, G. Sletten, M. Kmiecik, A. Maj, J. Styczen, K. Zuber, F. Azaiez¹, K. Hauschild¹, A. Korichi¹, A. Lopez-Martens¹, J. Roccaz¹, S. Siem¹, F. Hannachi², J.N. Scheurer², P. Bednarczyk³, T. Byrski³, D. Curien³, O. Dorvaux³, G. Duchêne³, B.J.P. Gall³, F. Khalfallah³, I. Piqueras³, J. Robin³, S. B. Patel, O. A. Evans, G. Rainovski, C. M. Petrache, D. Petrache, G. La Rana, R. Moro, G. De Angelis, P. Falon, I.Y. Lee, J. C. Lisle, B. Cederwall, K. Lagergen, R. M. Lieder, E. Podsvirova, W. Gast, H. Jager, N. Redon⁴, A. Gorgen

(2005)

The gamma decay of the nuclei 124,125Ba has been investigated by means of the EUROBALL spectrometer, coupled to the DIAMANT array of charged-particle detectors, using the reaction 64Ni + 64Ni at E_{beam}=255 and 261 MeV. In the nucleus 125Ba six new E1 transitions have been found to link opposite-parity bands currently interpreted as \nu d_{5/2(+g_{7/2},nu h_11/2}structures. The previously unknown Jpi=3- level in the nucleus $^{124}$Ba has also been identified; its excitation energy is accurately reproduced by a microscopic calculation including octupole correlations. Both issues are bolstered by sizable B(E1)/B(E2) ratios.

1 :	CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

2 :	CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

3 :	IReS - Institut de Recherches Subatomiques

4 :	IPNL - Institut de Physique Nucléaire de Lyon

Thème(s)

Physique/Physique Nucléaire Expérimentale

Mot(s)-clé(s) : nuclear energy level transitions – nuclear transition probabilities – nuclei with mass number 90 to 149 – nuclear energy levels


in2p3-00025456, version 1
http://hal.in2p3.fr/in2p3-00025456
oai:hal.in2p3.fr:in2p3-00025456
Contributeur : Yvette Heyd <>
Soumis le : Lundi 23 Janvier 2006, 14:38:47
Dernière modification le : Mercredi 17 Juin 2009, 10:41:27