The $({ν g}_{9 / 2}^{2} {π p}_{3 / 2})_{19 / 2^{-}}$ Isomer in ${}^{71}C u$ and the Prediction of its $E 2$ Decay from the Shell Model

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9 November 1998

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

Vol. 81 (19) , 4100-4103
https://doi.org/10.1103/physrevlett.81.4100

Abstract

In deep-inelastic collisions of 8 MeV/nucleon

^{76} Ge

projectiles with

^{198} Pt

, we have found a

T_{1 / 2} = 0.25 (3) μ s

isomer in

^{71} Cu

which decays through a

γ

-ray cascade of 133-495-939-1189 keV to the

π p_{3 / 2}

ground state. The detector setup records the

γ

rays of the isomeric decay as well as data on the fragment which provide its isotopic assignment. The new

^{71} Cu

levels are firmly assigned as the five yrast states of the

ν g_{9 / 2}^{2} π p_{3 / 2}

configuration; a parameter-free shell model calculation using the two-body residual interactions as observed in

^{70} Cu

and

^{70} Ni

predicts the

^{71} Cu

data with excellent accuracy.

Keywords

This publication has 21 references indexed in Scilit:

Lifetime measurement of theπg9/2isomer in79As
Physical Review C, 1998
New μs-isomers and isomeric beams
Nuclear Physics A, 1998
Isomer-scope: A new instrument for in-beam γ-ray spectroscopy through deep inelastic collisions
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1997
Mono-isotopic beams of exotic nuclei produced by a universal on-line laser ion source
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Acceleration of heavy ions by the JAERI tandem superconducting booster
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1996
$N = 40$ Neutron Subshell Closure in the ${}^{68}{Ni}$ Nucleus
Physical Review Letters, 1995
Inelastic and transfer reactions in 92Mo+255 MeV 60Ni collisions studied by γγ coincidences
Physics Letters B, 1990
Isomeric transitions of 211mPo and 212mPo and E4 effective charge
Nuclear Physics A, 1989
Population of high spin states by quasi-elastic and deep inelastic collisions
Physical Review C, 1988
Assignment and Disintegration Scheme of the 6.75-Hour Molybdenum
Physical Review B, 1950