Half-Life Measurements of Bare, Mass-Resolved Isomers in a Storage-Cooler Ring

Publisher Website

4 December 1995

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

Vol. 75 (23) , 4182-4185
https://doi.org/10.1103/physrevlett.75.4182

Abstract

Secondary beams from fragmentation of

{}^{58}{Ni}

have been produced with energies of

(200 - 220) A

MeV, separated with a fragment separator and injected into a storage-cooler ring for half-life measurements. The relative momentum spread

\frac{Δ p}{p} \approx 1 \times 10^{- 6}

(FWHM) which we achieved allowed us to resolve the ground and isomeric states of cooled

{}^{52}{Mn}

and

{}^{53}{Fe}

nuclei in the measured mass spectra. The circulating beams were fully ionized, which rendered it possible to measure pure

β^{+}

branches for

{}^{52 g}{Fe}

and

{}^{53 g}{Fe}

and the sum of pure

β^{+}

and

γ

branches in the decay of the isomers

{}^{52 m}{Mn}

and

{}^{53 m}{Fe}

.

Keywords

This publication has 10 references indexed in Scilit:

The GSI projectile fragment separator (FRS): a versatile magnetic system for relativistic heavy ions
Published by Elsevier ,2002
First spatial isotopic separation of relativistic uranium projectile fragments
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1994
Nuclear Data Sheets Update for A = 52
Nuclear Data Sheets, 1994
The 1993 atomic mass evaluation
Nuclear Physics A, 1993
Electron-nucleus interactions in few-electron Fe ions
Physical Review A, 1993
First observation of bound-state $β^{-}$ decay
Physical Review Letters, 1992
First storage and cooling of secondary heavy-ion beams at relativistic energies
Physical Review Letters, 1992
First experiments at the Darmstadt storage-cooler ring ESR
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1992
Nuclear Data Sheets update for A=53
Nuclear Data Sheets, 1990
Charge-state dependence of nuclear lifetimes
Physical Review Letters, 1989