First Investigation of Excited States in the Odd-Proton Nucleus Fr209

Authors

D. A. Meyer
C. W. Beausang, University of RichmondFollow
J. J. Ressler
H. Ai
H. Amro
M. Babilon
R. F. Casten
C. R. Fitzpatrick
G. Gurdal
A. Heinz
E. A. McCutchan
C. Plettner
J. Qian
N. J. Thomas
V. Werner
E. Williams
N. V. Zamfir
Jing-ye Zhang

DOI

10.1103/PhysRevC.73.024307

Abstract

Excited states in ²⁰⁹Fr were produced following the ¹⁷⁶Yb(³⁷Cl, 4n) reaction. An excitation function was measured with data taken at 173, 179, and 185 MeV. Recoiling fusion-evaporation products were separated using the SASSYER gas-filled spectrometer. HPGe clover detectors of the YRAST Ball array at the target position and at the focal plane were used to detect prompt and delayed gamma ray decays, providing the first spectroscopic information about prompt and delayed transitions in ²⁰⁹Fr. The decay from a proposedπ i_13/2 configuration isomer was observed in ²⁰⁹Fr, and its half-life was measured to be 446(14)ns. States above the isomer were also observed.

Document Type

Article

Publication Date

2-8-2006

Publisher Statement

Copyright © 2006 The American Physical Society. This article first appeared in Physical Review C 73, no. 2 (February 8, 2006): 024307-1-24307-8. doi:10.1103/PhysRevC.73.024307.

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Recommended Citation

Meyer, D., C. Beausang, J. Ressler, H. Ai, H. Amro, M. Babilon, R. Casten, C. Fitzpatrick, G. Gürdal, A. Heinz, E. Mccutchan, C. Plettner, J. Qian, N. Thomas, V. Werner, E. Williams, N. Zamfir, and Jing-Ye Zhang. "First Investigation of Excited States in the Odd-Proton Nucleus Fr209." Physical Review C 73, no. 2 (February 8, 2006): 024307-1-24307-8. doi:10.1103/PhysRevC.73.024307.