학술논문
Octupole correlations in N = 88 154 Dy: Octupole vibration versus stable deformation.
Document Type
Article
Author
Source
Subject
*DYSPROSIUM
*RADIOISOTOPES
*VIBRATION (Mechanics)
*
*
Language
ISSN
2469-9985
Abstract
We report on low-spin states of 154Dy populated via the reaction 155Gd (He3,4n) with a beam energy of 37.5 MeV from the Separated Sector Cyclotron at iThemba Laboratory. The AFRODITE ?-ray spectrometer was used to establish new E1 transitions between bands of opposite parity. The measurements broaden the N=88 systematics on the relationship between the first excited positive-parity pairing isomer band and the lowest-lying negative-parity band as the nuclear quadrupole deformation decreases with increasing proton number. In a region of strong octupole correlations the data suggest that the spectroscopy of N=88 nuclei is driven by stable octupole deformations and not by vibrations. [ABSTRACT FROM AUTHOR]