High-spin study of neutron-deficient 114Xe

✍ Scribed by E.S. Paul; H.C. Scraggs; A.J. Boston; O. Dorvaux; P.T. Greenlees; K. Helariutta; P. Jones; R. Julin; S. Juutinen; H. Kankaanpää; H. Kettunen; M. Muikku; P. Nieminen; P. Rahkila; O. Stezowski

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 181 KB
• Volume: 673
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(00)00093-2

✦ Synopsis

High-spin states have been populated in 114 54 Xe via the 58 Ni( 58 Ni, 2p) reaction at 210 MeV, using the JUROSPHERE γ -ray spectrometer to record γ -ray coincidences. The known level scheme has been significantly extended and includes two positive-parity and three negative-parity structures. At the highest spins, one of the negative-parity bands becomes yrast and shows the characteristics of a smoothly terminating band. Quadrupole moments for two of the bands at high spin have been estimated through a Doppler-broadened lineshape analysis; the terminating band has a reduced quadrupole moment implying that it is not far from full termination into a noncollective oblate state. Extracted B(E1) strengths are discussed in terms of possible octupole collectivity.