Signature inversion in the yrare band of $\chem{^{119}Xe}$

C.-B. Moon; T. Komatsubara; Y. Sasaki; T. Jumatsu; K. Yamada; K. Satou; K. Furuno

doi:doi:10.1140/epja/iepja1438

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2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A 14, 13-16 (2002)
DOI: 10.1140/epja/iepja1438

Short Note

Signature inversion in the yrare band of $\chem{^{119}Xe}$

C.-B. Moon¹, T. Komatsubara², Y. Sasaki², T. Jumatsu², K. Yamada², K. Satou² and K. Furuno²

¹ Department of Physics, Hoseo University, Chung-Nam 336-795, Korea
² Institute of Physics and Tandem Accelerator Center, University of Tsukuba, Ibaraki 305-8577, Japan

cbmoon@office.hoseo.ac.kr

(Received: 8 January 2002 / Revised version: 18 April 2002 Communicated by D. Schwalm)

Abstract
Excited states of the $\chem{^{119}Xe}$ nucleus have been studied by using in-beam $\gamma$ -ray spectroscopy with the $\chem{^{107}Ag}$ ( $\chem{^{16}O}$ , p3n) $\chem{^{119}Xe}$ fusion-evaporation reaction at a beam energy of 85 MeV. The level scheme of $\chem{^{119}Xe}$ has been derived from $\gamma$ - $\gamma$ coincidence and $\gamma$ - $\gamma$ angular correlation analyses. We have, for the first time, established the second negative-parity favored and unfavored states built on the 11/2 ^- state, namely the yrare rotational bands in $\chem{^{119}Xe}$ . In contrast to the behavior of the yrast bands where the favored states are lying lower in energy, the yrare favored states were observed to lie above the unfavored band. Such a signature inversion in $\chem{^{119}Xe}$ is changed to be normal at $I = 12 \hbar$ .

PACS
21.10.Re - Collective levels.
23.20.Lv - Gamma transitions and level energies.
27.60.+j - $90 \leq A \leq 149$ .

© Società Italiana di Fisica, Springer-Verlag 2002