Negative Parity States in ^39Cl Configured by Crossing Major Shell Orbits
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Long-Chun Tao,
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Y. Ichikawa,
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Cen-Xi Yuan,
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Y. Ishibashi,
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A. Takamine,
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A. Gladkov,
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T. Fujita,
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K. Asahi,
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T. Egami,
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C. Funayama,
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K. Imamura,
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Jian-Ling Lou,
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T. Kawaguchi,
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S. Kojima,
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T. Nishizaka,
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T. Sato,
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D. Tominaga,
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Xiao-Fei Yang,
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H. Yamazaki,
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Yan-Lin Ye,
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H. Ueno
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Abstract
Traditional "magic numbers" were once regarded as immutable throughout the nuclear chart. However, unexpected changes were found for unstable nuclei around N=20. With both proton and neutron numbers around the magic number of 20, the neutron-rich ^39Cl isotope provides a good test case for the study of the quantum-state evolution across the major shell. In the present work, the negative parity states in ^39Cl are investigated through the \beta decay spectroscopy of ^39S. Newly observed \gamma transitions together with a new state are assigned into the level scheme of ^39Cl. The spin parity of 5/2^- for the lowest negative parity state in ^39Cl is reconfirmed using the combined \gamma transition information. These systematic observations of the negative parity states in ^39Cl allow a comprehensive comparison with the theoretical descriptions. The lowest 5/2^- state in ^39Cl remains exotic in terms of comparisons with existing theoretical calculations and with the neighboring isotopes having similar single-particle configurations. Further experimental and theoretical investigations are suggested.
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Cite this article:
Long-Chun Tao, Y. Ichikawa, Cen-Xi Yuan, Y. Ishibashi, A. Takamine, A. Gladkov, T. Fujita, K. Asahi, T. Egami, C. Funayama, K. Imamura, Jian-Ling Lou, T. Kawaguchi, S. Kojima, T. Nishizaka, T. Sato, D. Tominaga, Xiao-Fei Yang, H. Yamazaki, Yan-Lin Ye, H. Ueno. Negative Parity States in $^{39}$Cl Configured by Crossing Major Shell Orbits[J].
Chin. Phys. Lett., 2019, 36(6): 062101.
DOI: 10.1088/0256-307X/36/6/062101
Long-Chun Tao, Y. Ichikawa, Cen-Xi Yuan, Y. Ishibashi, A. Takamine, A. Gladkov, T. Fujita, K. Asahi, T. Egami, C. Funayama, K. Imamura, Jian-Ling Lou, T. Kawaguchi, S. Kojima, T. Nishizaka, T. Sato, D. Tominaga, Xiao-Fei Yang, H. Yamazaki, Yan-Lin Ye, H. Ueno. Negative Parity States in $^{39}$Cl Configured by Crossing Major Shell Orbits[J]. Chin. Phys. Lett., 2019, 36(6): 062101. DOI: 10.1088/0256-307X/36/6/062101
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Long-Chun Tao, Y. Ichikawa, Cen-Xi Yuan, Y. Ishibashi, A. Takamine, A. Gladkov, T. Fujita, K. Asahi, T. Egami, C. Funayama, K. Imamura, Jian-Ling Lou, T. Kawaguchi, S. Kojima, T. Nishizaka, T. Sato, D. Tominaga, Xiao-Fei Yang, H. Yamazaki, Yan-Lin Ye, H. Ueno. Negative Parity States in $^{39}$Cl Configured by Crossing Major Shell Orbits[J]. Chin. Phys. Lett., 2019, 36(6): 062101. DOI: 10.1088/0256-307X/36/6/062101
Long-Chun Tao, Y. Ichikawa, Cen-Xi Yuan, Y. Ishibashi, A. Takamine, A. Gladkov, T. Fujita, K. Asahi, T. Egami, C. Funayama, K. Imamura, Jian-Ling Lou, T. Kawaguchi, S. Kojima, T. Nishizaka, T. Sato, D. Tominaga, Xiao-Fei Yang, H. Yamazaki, Yan-Lin Ye, H. Ueno. Negative Parity States in $^{39}$Cl Configured by Crossing Major Shell Orbits[J]. Chin. Phys. Lett., 2019, 36(6): 062101. DOI: 10.1088/0256-307X/36/6/062101
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