Development of axial asymmetry in the neutron-rich nucleus 110Mo

H. Watanabe, K. Yamaguchi, A. Odahara, T. Sumikama, S. Nishimura, K. Yoshinaga, Z. Li, Y. Miyashita, K. Sato, L. Próchniak, H. Baba, J. S. Berryman, N. Blasi, A. Bracco, F. Camera, J. Chiba, P. Doornenbal, Shintaro Go, T. Hashimoto, S. Hayakawa & 31 others C. Hinke, N. Hinohara, E. Ideguchi, T. Isobe, Y. Ito, D. G. Jenkins, Y. Kawada, N. Kobayashi, Y. Kondo, R. Krücken, S. Kubono, G. Lorusso, T. Nakano, T. Nakatsukasa, M. Kurata-Nishimura, H. J. Ong, S. Ota, Z. S. Podolyák, H. Sakurai, H. Scheit, K. Steiger, D. Steppenbeck, K. Sugimoto, K. Tajiri, S. Takano, A. Takashima, Takashi Teranishi, Y. Wakabayashi, P. M. Walker, O. Wieland, H. Yamaguchi

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Abstract

The neutron-rich nucleus 110Mo has been investigated by means of γ-ray spectroscopy following the β-decay of 110Nb, produced using in-flight fission of a 238U beam at 345 MeV/nucleon at the RIBF facility. In addition to the ground-band members reported previously, spectroscopic information on the low-lying levels of the quasi-γ band built on the second 2+ state at 494 keV has been obtained for the first time. The experimental finding of the second 2+ state being lower than the yrast 4+ level suggests that axially-asymmetric γ softness is substantially enhanced in this nucleus. The experimental results are compared with model calculations based on the general Bohr Hamiltonian method. The systematics of the low-lying levels in even-even A≈110 nuclei is discussed in comparison with that in the neutron-rich A≈190 region, by introducing the quantity ES/E(21+), ES=E(22+)-E(41+), as a global signature of the structural evolution involving axial asymmetry.

Original languageEnglish
Pages (from-to)270-275
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume704
Issue number4
DOIs
Publication statusPublished - Oct 19 2011

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asymmetry
neutrons
nuclei
even-even nuclei
softness
fission
rays
signatures
flight
decay
spectroscopy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

Watanabe, H., Yamaguchi, K., Odahara, A., Sumikama, T., Nishimura, S., Yoshinaga, K., ... Yamaguchi, H. (2011). Development of axial asymmetry in the neutron-rich nucleus 110Mo. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 704(4), 270-275. https://doi.org/10.1016/j.physletb.2011.09.050

Development of axial asymmetry in the neutron-rich nucleus 110Mo. / Watanabe, H.; Yamaguchi, K.; Odahara, A.; Sumikama, T.; Nishimura, S.; Yoshinaga, K.; Li, Z.; Miyashita, Y.; Sato, K.; Próchniak, L.; Baba, H.; Berryman, J. S.; Blasi, N.; Bracco, A.; Camera, F.; Chiba, J.; Doornenbal, P.; Go, Shintaro; Hashimoto, T.; Hayakawa, S.; Hinke, C.; Hinohara, N.; Ideguchi, E.; Isobe, T.; Ito, Y.; Jenkins, D. G.; Kawada, Y.; Kobayashi, N.; Kondo, Y.; Krücken, R.; Kubono, S.; Lorusso, G.; Nakano, T.; Nakatsukasa, T.; Kurata-Nishimura, M.; Ong, H. J.; Ota, S.; Podolyák, Z. S.; Sakurai, H.; Scheit, H.; Steiger, K.; Steppenbeck, D.; Sugimoto, K.; Tajiri, K.; Takano, S.; Takashima, A.; Teranishi, Takashi; Wakabayashi, Y.; Walker, P. M.; Wieland, O.; Yamaguchi, H.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 704, No. 4, 19.10.2011, p. 270-275.

Research output: Contribution to journalArticle

Watanabe, H, Yamaguchi, K, Odahara, A, Sumikama, T, Nishimura, S, Yoshinaga, K, Li, Z, Miyashita, Y, Sato, K, Próchniak, L, Baba, H, Berryman, JS, Blasi, N, Bracco, A, Camera, F, Chiba, J, Doornenbal, P, Go, S, Hashimoto, T, Hayakawa, S, Hinke, C, Hinohara, N, Ideguchi, E, Isobe, T, Ito, Y, Jenkins, DG, Kawada, Y, Kobayashi, N, Kondo, Y, Krücken, R, Kubono, S, Lorusso, G, Nakano, T, Nakatsukasa, T, Kurata-Nishimura, M, Ong, HJ, Ota, S, Podolyák, ZS, Sakurai, H, Scheit, H, Steiger, K, Steppenbeck, D, Sugimoto, K, Tajiri, K, Takano, S, Takashima, A, Teranishi, T, Wakabayashi, Y, Walker, PM, Wieland, O & Yamaguchi, H 2011, 'Development of axial asymmetry in the neutron-rich nucleus 110Mo', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 704, no. 4, pp. 270-275. https://doi.org/10.1016/j.physletb.2011.09.050
Watanabe, H. ; Yamaguchi, K. ; Odahara, A. ; Sumikama, T. ; Nishimura, S. ; Yoshinaga, K. ; Li, Z. ; Miyashita, Y. ; Sato, K. ; Próchniak, L. ; Baba, H. ; Berryman, J. S. ; Blasi, N. ; Bracco, A. ; Camera, F. ; Chiba, J. ; Doornenbal, P. ; Go, Shintaro ; Hashimoto, T. ; Hayakawa, S. ; Hinke, C. ; Hinohara, N. ; Ideguchi, E. ; Isobe, T. ; Ito, Y. ; Jenkins, D. G. ; Kawada, Y. ; Kobayashi, N. ; Kondo, Y. ; Krücken, R. ; Kubono, S. ; Lorusso, G. ; Nakano, T. ; Nakatsukasa, T. ; Kurata-Nishimura, M. ; Ong, H. J. ; Ota, S. ; Podolyák, Z. S. ; Sakurai, H. ; Scheit, H. ; Steiger, K. ; Steppenbeck, D. ; Sugimoto, K. ; Tajiri, K. ; Takano, S. ; Takashima, A. ; Teranishi, Takashi ; Wakabayashi, Y. ; Walker, P. M. ; Wieland, O. ; Yamaguchi, H. / Development of axial asymmetry in the neutron-rich nucleus 110Mo. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2011 ; Vol. 704, No. 4. pp. 270-275.
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title = "Development of axial asymmetry in the neutron-rich nucleus 110Mo",
abstract = "The neutron-rich nucleus 110Mo has been investigated by means of γ-ray spectroscopy following the β-decay of 110Nb, produced using in-flight fission of a 238U beam at 345 MeV/nucleon at the RIBF facility. In addition to the ground-band members reported previously, spectroscopic information on the low-lying levels of the quasi-γ band built on the second 2+ state at 494 keV has been obtained for the first time. The experimental finding of the second 2+ state being lower than the yrast 4+ level suggests that axially-asymmetric γ softness is substantially enhanced in this nucleus. The experimental results are compared with model calculations based on the general Bohr Hamiltonian method. The systematics of the low-lying levels in even-even A≈110 nuclei is discussed in comparison with that in the neutron-rich A≈190 region, by introducing the quantity ES/E(21+), ES=E(22+)-E(41+), as a global signature of the structural evolution involving axial asymmetry.",
author = "H. Watanabe and K. Yamaguchi and A. Odahara and T. Sumikama and S. Nishimura and K. Yoshinaga and Z. Li and Y. Miyashita and K. Sato and L. Pr{\'o}chniak and H. Baba and Berryman, {J. S.} and N. Blasi and A. Bracco and F. Camera and J. Chiba and P. Doornenbal and Shintaro Go and T. Hashimoto and S. Hayakawa and C. Hinke and N. Hinohara 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 T. Nakatsukasa and M. Kurata-Nishimura and Ong, {H. J.} and S. Ota and Podoly{\'a}k, {Z. S.} and H. Sakurai and H. Scheit and K. Steiger and D. Steppenbeck and K. Sugimoto and K. Tajiri and S. Takano and A. Takashima and Takashi Teranishi and Y. Wakabayashi and Walker, {P. M.} and O. Wieland and H. Yamaguchi",
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T1 - Development of axial asymmetry in the neutron-rich nucleus 110Mo

AU - Watanabe, H.

AU - Yamaguchi, K.

AU - Odahara, A.

AU - Sumikama, T.

AU - Nishimura, S.

AU - Yoshinaga, K.

AU - Li, Z.

AU - Miyashita, Y.

AU - Sato, K.

AU - Próchniak, L.

AU - Baba, H.

AU - Berryman, J. S.

AU - Blasi, N.

AU - Bracco, A.

AU - Camera, F.

AU - Chiba, J.

AU - Doornenbal, P.

AU - Go, Shintaro

AU - Hashimoto, T.

AU - Hayakawa, S.

AU - Hinke, C.

AU - Hinohara, N.

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 - Nakatsukasa, T.

AU - Kurata-Nishimura, M.

AU - Ong, H. J.

AU - Ota, S.

AU - Podolyák, Z. S.

AU - Sakurai, H.

AU - Scheit, H.

AU - Steiger, K.

AU - Steppenbeck, D.

AU - Sugimoto, K.

AU - Tajiri, K.

AU - Takano, S.

AU - Takashima, A.

AU - Teranishi, Takashi

AU - Wakabayashi, Y.

AU - Walker, P. M.

AU - Wieland, O.

AU - Yamaguchi, H.

PY - 2011/10/19

Y1 - 2011/10/19

N2 - The neutron-rich nucleus 110Mo has been investigated by means of γ-ray spectroscopy following the β-decay of 110Nb, produced using in-flight fission of a 238U beam at 345 MeV/nucleon at the RIBF facility. In addition to the ground-band members reported previously, spectroscopic information on the low-lying levels of the quasi-γ band built on the second 2+ state at 494 keV has been obtained for the first time. The experimental finding of the second 2+ state being lower than the yrast 4+ level suggests that axially-asymmetric γ softness is substantially enhanced in this nucleus. The experimental results are compared with model calculations based on the general Bohr Hamiltonian method. The systematics of the low-lying levels in even-even A≈110 nuclei is discussed in comparison with that in the neutron-rich A≈190 region, by introducing the quantity ES/E(21+), ES=E(22+)-E(41+), as a global signature of the structural evolution involving axial asymmetry.

AB - The neutron-rich nucleus 110Mo has been investigated by means of γ-ray spectroscopy following the β-decay of 110Nb, produced using in-flight fission of a 238U beam at 345 MeV/nucleon at the RIBF facility. In addition to the ground-band members reported previously, spectroscopic information on the low-lying levels of the quasi-γ band built on the second 2+ state at 494 keV has been obtained for the first time. The experimental finding of the second 2+ state being lower than the yrast 4+ level suggests that axially-asymmetric γ softness is substantially enhanced in this nucleus. The experimental results are compared with model calculations based on the general Bohr Hamiltonian method. The systematics of the low-lying levels in even-even A≈110 nuclei is discussed in comparison with that in the neutron-rich A≈190 region, by introducing the quantity ES/E(21+), ES=E(22+)-E(41+), as a global signature of the structural evolution involving axial asymmetry.

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U2 - 10.1016/j.physletb.2011.09.050

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EP - 275

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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SN - 0370-2693

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