Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11

T. Nakamura; A. M. Vinodkumar; T. Sugimoto; N. Aoi; H. Baba; D. Bazin; N. Fukuda; T. Gomi; H. Hasegawa; N. Imai; M. Ishihara; T. Kobayashi; Y. Kondo; T. Kubo; M. Miura; T. Motobayashi; H. Otsu; A. Saito; H. Sakurai; S. Shimoura; K. Watanabe; Y. X. Watanabe; T. Yakushiji; Y. Yanagisawa; K. Yoneda

doi:10.1103/PhysRevLett.96.252502

Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11

T. Nakamura, A. M. Vinodkumar, T. Sugimoto, N. Aoi, H. Baba, D. Bazin, N. Fukuda, T. Gomi, H. Hasegawa, N. Imai, M. Ishihara, T. Kobayashi, Y. Kondo, T. Kubo, M. Miura, T. Motobayashi, H. Otsu, A. Saito, H. Sakurai, S. ShimouraK. Watanabe, Y. X. Watanabe, T. Yakushiji, Y. Yanagisawa, K. Yoneda

SCI - Physics

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

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Abstract

An exclusive measurement has been made of the Coulomb dissociation of the two-neutron halo nucleus Li11 at 70MeV/nucleon at RIKEN. Strong low-energy (soft) E1 excitation is observed, peaked at about Ex=0.6MeV with B(E1)=1.42(18)e2fm2 for Erel≤3MeV, which was largely missed in previous measurements. This excitation represents the strongest E1 transition ever observed at such low excitation energies. The spectrum is reproduced well by a three-body model with a strong two-neutron correlation, which is further supported by the E1 non-energy-weighted cluster sum rule.

Original language	English
Article number	252502
Journal	Physical review letters
Volume	96
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.96.252502
Publication status	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.252502

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Nakamura, T., Vinodkumar, A. M., Sugimoto, T., Aoi, N., Baba, H., Bazin, D., Fukuda, N., Gomi, T., Hasegawa, H., Imai, N., Ishihara, M., Kobayashi, T., Kondo, Y., Kubo, T., Miura, M., Motobayashi, T., Otsu, H., Saito, A., Sakurai, H., ... Yoneda, K. (2006). Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11. Physical review letters, 96(25), [252502]. https://doi.org/10.1103/PhysRevLett.96.252502

Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11. / Nakamura, T.; Vinodkumar, A. M.; Sugimoto, T.; Aoi, N.; Baba, H.; Bazin, D.; Fukuda, N.; Gomi, T.; Hasegawa, H.; Imai, N.; Ishihara, M.; Kobayashi, T.; Kondo, Y.; Kubo, T.; Miura, M.; Motobayashi, T.; Otsu, H.; Saito, A.; Sakurai, H.; Shimoura, S.; Watanabe, K.; Watanabe, Y. X.; Yakushiji, T.; Yanagisawa, Y.; Yoneda, K.

In: Physical review letters, Vol. 96, No. 25, 252502, 2006.

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

Nakamura, T, Vinodkumar, AM, Sugimoto, T, Aoi, N, Baba, H, Bazin, D, Fukuda, N, Gomi, T, Hasegawa, H, Imai, N, Ishihara, M, Kobayashi, T, Kondo, Y, Kubo, T, Miura, M, Motobayashi, T, Otsu, H, Saito, A, Sakurai, H, Shimoura, S, Watanabe, K, Watanabe, YX, Yakushiji, T, Yanagisawa, Y & Yoneda, K 2006, 'Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11', Physical review letters, vol. 96, no. 25, 252502. https://doi.org/10.1103/PhysRevLett.96.252502

Nakamura, T. ; Vinodkumar, A. M. ; Sugimoto, T. ; Aoi, N. ; Baba, H. ; Bazin, D. ; Fukuda, N. ; Gomi, T. ; Hasegawa, H. ; Imai, N. ; Ishihara, M. ; Kobayashi, T. ; Kondo, Y. ; Kubo, T. ; Miura, M. ; Motobayashi, T. ; Otsu, H. ; Saito, A. ; Sakurai, H. ; Shimoura, S. ; Watanabe, K. ; Watanabe, Y. X. ; Yakushiji, T. ; Yanagisawa, Y. ; Yoneda, K. / Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11. In: Physical review letters. 2006 ; Vol. 96, No. 25.

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title = "Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11",

abstract = "An exclusive measurement has been made of the Coulomb dissociation of the two-neutron halo nucleus Li11 at 70MeV/nucleon at RIKEN. Strong low-energy (soft) E1 excitation is observed, peaked at about Ex=0.6MeV with B(E1)=1.42(18)e2fm2 for Erel≤3MeV, which was largely missed in previous measurements. This excitation represents the strongest E1 transition ever observed at such low excitation energies. The spectrum is reproduced well by a three-body model with a strong two-neutron correlation, which is further supported by the E1 non-energy-weighted cluster sum rule.",

author = "T. Nakamura and Vinodkumar, {A. M.} and T. Sugimoto and N. Aoi and H. Baba and D. Bazin and N. Fukuda and T. Gomi and H. Hasegawa and N. Imai and M. Ishihara and T. Kobayashi and Y. Kondo and T. Kubo and M. Miura and T. Motobayashi and H. Otsu and A. Saito and H. Sakurai and S. Shimoura and K. Watanabe and Watanabe, {Y. X.} and T. Yakushiji and Y. Yanagisawa and K. Yoneda",

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doi = "10.1103/PhysRevLett.96.252502",

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AU - Nakamura, T.

AU - Vinodkumar, A. M.

AU - Sugimoto, T.

AU - Aoi, N.

AU - Baba, H.

AU - Bazin, D.

AU - Fukuda, N.

AU - Gomi, T.

AU - Hasegawa, H.

AU - Imai, N.

AU - Ishihara, M.

AU - Kobayashi, T.

AU - Kondo, Y.

AU - Kubo, T.

AU - Miura, M.

AU - Motobayashi, T.

AU - Otsu, H.

AU - Saito, A.

AU - Sakurai, H.

AU - Shimoura, S.

AU - Watanabe, K.

AU - Watanabe, Y. X.

AU - Yakushiji, T.

AU - Yanagisawa, Y.

AU - Yoneda, K.

PY - 2006

Y1 - 2006

N2 - An exclusive measurement has been made of the Coulomb dissociation of the two-neutron halo nucleus Li11 at 70MeV/nucleon at RIKEN. Strong low-energy (soft) E1 excitation is observed, peaked at about Ex=0.6MeV with B(E1)=1.42(18)e2fm2 for Erel≤3MeV, which was largely missed in previous measurements. This excitation represents the strongest E1 transition ever observed at such low excitation energies. The spectrum is reproduced well by a three-body model with a strong two-neutron correlation, which is further supported by the E1 non-energy-weighted cluster sum rule.

AB - An exclusive measurement has been made of the Coulomb dissociation of the two-neutron halo nucleus Li11 at 70MeV/nucleon at RIKEN. Strong low-energy (soft) E1 excitation is observed, peaked at about Ex=0.6MeV with B(E1)=1.42(18)e2fm2 for Erel≤3MeV, which was largely missed in previous measurements. This excitation represents the strongest E1 transition ever observed at such low excitation energies. The spectrum is reproduced well by a three-body model with a strong two-neutron correlation, which is further supported by the E1 non-energy-weighted cluster sum rule.

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Observation of strong low-lying E1 strength in the two-neutron halo nucleus Li 11

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