Structural evolution in the neutron-rich Nuclei Zr106 and Zr108

T. Sumikama; K. Yoshinaga; H. Watanabe; S. Nishimura; Y. Miyashita; K. Yamaguchi; K. Sugimoto; J. Chiba; Z. Li; H. Baba; J. S. Berryman; N. Blasi; A. Bracco; F. Camera; P. Doornenbal; S. Go; T. Hashimoto; S. Hayakawa; C. Hinke; E. Ideguchi; T. Isobe; Y. Ito; D. G. Jenkins; Y. Kawada; N. Kobayashi; Y. Kondo; R. Krücken; S. Kubono; G. Lorusso; T. Nakano; M. Kurata-Nishimura; A. Odahara; H. J. Ong; S. Ota; Zs Podolyák; H. Sakurai; H. Scheit; K. Steiger; D. Steppenbeck; S. Takano; A. Takashima; K. Tajiri; T. Teranishi; Y. Wakabayashi; P. M. Walker; O. Wieland; H. Yamaguchi

doi:10.1103/PhysRevLett.106.202501

Structural evolution in the neutron-rich Nuclei Zr106 and Zr108

T. Sumikama, K. Yoshinaga, H. Watanabe, S. Nishimura, Y. Miyashita, K. Yamaguchi, K. Sugimoto, J. Chiba, Z. Li, H. Baba, J. S. Berryman, N. Blasi, A. Bracco, F. Camera, P. Doornenbal, S. Go, T. Hashimoto, S. Hayakawa, C. Hinke, E. IdeguchiT. Isobe, Y. Ito, D. G. Jenkins, Y. Kawada, N. Kobayashi, Y. Kondo, R. Krücken, S. Kubono, G. Lorusso, T. Nakano, M. Kurata-Nishimura, A. Odahara, H. J. Ong, S. Ota, Zs Podolyák, H. Sakurai, H. Scheit, K. Steiger, D. Steppenbeck, S. Takano, A. Takashima, K. Tajiri, T. Teranishi, Y. Wakabayashi, P. M. Walker, O. Wieland, H. Yamaguchi

Experimental Particle Physics

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Abstract

The low-lying states in Zr106 and Zr108 have been investigated by means of β-γ and isomer spectroscopy at the radioactive isotope beam factory (RIBF), respectively. A new isomer with a half-life of 620±150ns has been identified in Zr108. For the sequence of even-even Zr isotopes, the excitation energies of the first 2⁺ states reach a minimum at N=64 and gradually increase as the neutron number increases up to N=68, suggesting a deformed subshell closure at N=64. The deformed ground state of Zr108 indicates that a spherical subshell gap predicted at N=70 is not large enough to change the ground state of Zr108 to the spherical shape. The possibility of a tetrahedral shape isomer in Zr108 is also discussed.

Original language	English
Article number	202501
Journal	Physical review letters
Volume	106
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.106.202501
Publication status	Published - May 16 2011

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.106.202501

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Sumikama, T., Yoshinaga, K., Watanabe, H., Nishimura, S., Miyashita, Y., Yamaguchi, K., Sugimoto, K., Chiba, J., Li, Z., Baba, H., Berryman, J. S., Blasi, N., Bracco, A., Camera, F., Doornenbal, P., Go, S., Hashimoto, T., Hayakawa, S., Hinke, C., ... Yamaguchi, H. (2011). Structural evolution in the neutron-rich Nuclei Zr106 and Zr108. Physical review letters, 106(20), [202501]. https://doi.org/10.1103/PhysRevLett.106.202501

Structural evolution in the neutron-rich Nuclei Zr106 and Zr108. / Sumikama, T.; Yoshinaga, K.; Watanabe, H.; Nishimura, S.; Miyashita, Y.; Yamaguchi, K.; Sugimoto, K.; Chiba, J.; Li, Z.; Baba, H.; Berryman, J. S.; Blasi, N.; Bracco, A.; Camera, F.; Doornenbal, P.; Go, S.; Hashimoto, T.; Hayakawa, S.; Hinke, C.; Ideguchi, E.; Isobe, T.; Ito, Y.; Jenkins, D. G.; Kawada, Y.; Kobayashi, N.; Kondo, Y.; Krücken, R.; Kubono, S.; Lorusso, G.; Nakano, T.; Kurata-Nishimura, M.; Odahara, A.; Ong, H. J.; Ota, S.; Podolyák, Zs; Sakurai, H.; Scheit, H.; Steiger, K.; Steppenbeck, D.; Takano, S.; Takashima, A.; Tajiri, K.; Teranishi, T.; Wakabayashi, Y.; Walker, P. M.; Wieland, O.; Yamaguchi, H.

In: Physical review letters, Vol. 106, No. 20, 202501, 16.05.2011.

Research output: Contribution to journal › Article › peer-review

Sumikama, T, Yoshinaga, K, Watanabe, H, Nishimura, S, Miyashita, Y, Yamaguchi, K, Sugimoto, K, Chiba, J, Li, Z, Baba, H, Berryman, JS, Blasi, N, Bracco, A, Camera, F, Doornenbal, P, Go, S, Hashimoto, T, Hayakawa, S, Hinke, C, Ideguchi, E, Isobe, T, Ito, Y, Jenkins, DG, Kawada, Y, Kobayashi, N, Kondo, Y, Krücken, R, Kubono, S, Lorusso, G, Nakano, T, Kurata-Nishimura, M, Odahara, A, Ong, HJ, Ota, S, Podolyák, Z, Sakurai, H, Scheit, H, Steiger, K, Steppenbeck, D, Takano, S, Takashima, A, Tajiri, K, Teranishi, T, Wakabayashi, Y, Walker, PM, Wieland, O & Yamaguchi, H 2011, 'Structural evolution in the neutron-rich Nuclei Zr106 and Zr108', Physical review letters, vol. 106, no. 20, 202501. https://doi.org/10.1103/PhysRevLett.106.202501

Sumikama, T. ; Yoshinaga, K. ; Watanabe, H. ; Nishimura, S. ; Miyashita, Y. ; Yamaguchi, K. ; Sugimoto, K. ; Chiba, J. ; Li, Z. ; Baba, H. ; Berryman, J. S. ; Blasi, N. ; Bracco, A. ; Camera, F. ; Doornenbal, P. ; Go, S. ; Hashimoto, T. ; Hayakawa, S. ; Hinke, C. ; Ideguchi, E. ; Isobe, T. ; Ito, Y. ; Jenkins, D. G. ; Kawada, Y. ; Kobayashi, N. ; Kondo, Y. ; Krücken, R. ; Kubono, S. ; Lorusso, G. ; Nakano, T. ; Kurata-Nishimura, M. ; Odahara, A. ; Ong, H. J. ; Ota, S. ; Podolyák, Zs ; Sakurai, H. ; Scheit, H. ; Steiger, K. ; Steppenbeck, D. ; Takano, S. ; Takashima, A. ; Tajiri, K. ; Teranishi, T. ; Wakabayashi, Y. ; Walker, P. M. ; Wieland, O. ; Yamaguchi, H. / Structural evolution in the neutron-rich Nuclei Zr106 and Zr108. In: Physical review letters. 2011 ; Vol. 106, No. 20.

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title = "Structural evolution in the neutron-rich Nuclei Zr106 and Zr108",

abstract = "The low-lying states in Zr106 and Zr108 have been investigated by means of β-γ and isomer spectroscopy at the radioactive isotope beam factory (RIBF), respectively. A new isomer with a half-life of 620±150ns has been identified in Zr108. For the sequence of even-even Zr isotopes, the excitation energies of the first 2+ states reach a minimum at N=64 and gradually increase as the neutron number increases up to N=68, suggesting a deformed subshell closure at N=64. The deformed ground state of Zr108 indicates that a spherical subshell gap predicted at N=70 is not large enough to change the ground state of Zr108 to the spherical shape. The possibility of a tetrahedral shape isomer in Zr108 is also discussed.",

author = "T. Sumikama and K. Yoshinaga and H. Watanabe and S. Nishimura and Y. Miyashita and K. Yamaguchi and K. Sugimoto and J. Chiba and Z. Li and H. Baba and Berryman, {J. S.} and N. Blasi and A. Bracco and F. Camera and P. Doornenbal and S. Go and T. Hashimoto and S. Hayakawa and C. Hinke and E. Ideguchi and T. Isobe and Y. Ito and Jenkins, {D. G.} and Y. Kawada and N. Kobayashi and Y. Kondo and R. Kr{\"u}cken and S. Kubono and G. Lorusso and T. Nakano and M. Kurata-Nishimura and A. Odahara and Ong, {H. J.} and S. Ota and Zs Podoly{\'a}k and H. Sakurai and H. Scheit and K. Steiger and D. Steppenbeck and S. Takano and A. Takashima and K. Tajiri and T. Teranishi and Y. Wakabayashi and Walker, {P. M.} and O. Wieland and H. Yamaguchi",

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AU - Sumikama, T.

AU - Yoshinaga, K.

AU - Watanabe, H.

AU - Nishimura, S.

AU - Miyashita, Y.

AU - Yamaguchi, K.

AU - Sugimoto, K.

AU - Chiba, J.

AU - Li, Z.

AU - Baba, H.

AU - Berryman, J. S.

AU - Blasi, N.

AU - Bracco, A.

AU - Camera, F.

AU - Doornenbal, P.

AU - Go, S.

AU - Hashimoto, T.

AU - Hayakawa, S.

AU - Hinke, C.

AU - Ideguchi, E.

AU - Isobe, T.

AU - Ito, Y.

AU - Jenkins, D. G.

AU - Kawada, Y.

AU - Kobayashi, N.

AU - Kondo, Y.

AU - Krücken, R.

AU - Kubono, S.

AU - Lorusso, G.

AU - Nakano, T.

AU - Kurata-Nishimura, M.

AU - Odahara, A.

AU - Ong, H. J.

AU - Ota, S.

AU - Podolyák, Zs

AU - Sakurai, H.

AU - Scheit, H.

AU - Steiger, K.

AU - Steppenbeck, D.

AU - Takano, S.

AU - Takashima, A.

AU - Tajiri, K.

AU - Teranishi, T.

AU - Wakabayashi, Y.

AU - Walker, P. M.

AU - Wieland, O.

AU - Yamaguchi, H.

PY - 2011/5/16

Y1 - 2011/5/16

N2 - The low-lying states in Zr106 and Zr108 have been investigated by means of β-γ and isomer spectroscopy at the radioactive isotope beam factory (RIBF), respectively. A new isomer with a half-life of 620±150ns has been identified in Zr108. For the sequence of even-even Zr isotopes, the excitation energies of the first 2+ states reach a minimum at N=64 and gradually increase as the neutron number increases up to N=68, suggesting a deformed subshell closure at N=64. The deformed ground state of Zr108 indicates that a spherical subshell gap predicted at N=70 is not large enough to change the ground state of Zr108 to the spherical shape. The possibility of a tetrahedral shape isomer in Zr108 is also discussed.

AB - The low-lying states in Zr106 and Zr108 have been investigated by means of β-γ and isomer spectroscopy at the radioactive isotope beam factory (RIBF), respectively. A new isomer with a half-life of 620±150ns has been identified in Zr108. For the sequence of even-even Zr isotopes, the excitation energies of the first 2+ states reach a minimum at N=64 and gradually increase as the neutron number increases up to N=68, suggesting a deformed subshell closure at N=64. The deformed ground state of Zr108 indicates that a spherical subshell gap predicted at N=70 is not large enough to change the ground state of Zr108 to the spherical shape. The possibility of a tetrahedral shape isomer in Zr108 is also discussed.

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SN - 0031-9007

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ER -

Structural evolution in the neutron-rich Nuclei Zr106 and Zr108

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