Coexistence features in the spherical-deformedA≊100 transition region: Picosecond lifetime measurements in ${}^{97}{Sr}$ , ${}^{97}Y$ , and ${}^{97}{Zr}$

1 March 1990

journal article
research article
Published by American Physical Society (APS) in Physical Review C

Vol. 41 (3) , 1115-1125
https://doi.org/10.1103/physrevc.41.1115

Abstract

A recently developed technique for fast timing measurements using β-γ-γ coincidences with plastic,

{BaF}_{2}

and Ge detectors, respectively, has been used to measure lifetimes in the range 5–1500 ps in the neutron-rich nuclei

{}^{97}{Sr}

{}^{97}Y

, and

{}^{97}{Zr}

. The results for

{}^{97}Y

are interpreted in terms of quadrupole vibrational excitations. For

{}^{97}{Sr}

the experimental data suggest the coexistence of spherical/vibrational and deformed states and allow the extraction of mixing matrix elements between them. A quadrupole moment of ‖

Q_{0}

‖=3.5(4) e b for the deformed states in

{}^{97}{Sr}

has been deduced.

Keywords

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Coexistence features in the spherical-deformedA≊100 transition region: Picosecond lifetime measurements inSr97,Y97, andZr97

Abstract

Keywords

Coexistence features in the spherical-deformedA≊100 transition region: Picosecond lifetime measurements in ${}^{97}{Sr}$ , ${}^{97}Y$ , and ${}^{97}{Zr}$