The first 2+ state of 14Be

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

doi:10.1016/j.physletb.2007.08.052

The first 2⁺ state of ¹⁴Be

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

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

39 Citations (Scopus)

Abstract

The first excited state of the most neutron-rich beryllium isotope, ¹⁴Be, has been studied by inelastic scattering with a ¹²C target at 68 MeV / nucleon. The state has been observed at E_x = 1.54 (13) MeV, and its spin-parity has been determined as J^π = 2⁺ from the measurement of the angular distribution. This provides a complete set of energies of the first 2⁺ states in the beryllium isotopic chain. The extracted deformation length of ¹⁴Be has been found to be substantially smaller than that of the neighboring nucleus ¹²Be, in which the N = 8 shell closure is quenched, indicating hindered collectivity in the ¹⁴Be nucleus.

Original language	English
Pages (from-to)	160-164
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	654
Issue number	5-6
DOIs	https://doi.org/10.1016/j.physletb.2007.08.052
Publication status	Published - 2007 Oct 18
Externally published	Yes

Keywords

Collectivity
Drip-line nucleus
Shell evolution

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2007.08.052

Cite this

Sugimoto, T., Nakamura, T., Kondo, Y., Aoi, N., Baba, H., Bazin, D., Fukuda, N., Gomi, T., Hasegawa, H., Imai, N., Ishihara, M., Kobayashi, T., Kubo, T., Miura, M., Motobayashi, T., Otsu, H., Saito, A., Sakurai, H., Shimoura, S., ... Yoneda, K. (2007). The first 2⁺ state of ¹⁴Be. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 654(5-6), 160-164. https://doi.org/10.1016/j.physletb.2007.08.052

The first 2⁺ state of ¹⁴Be. / Sugimoto, T.; Nakamura, T.; Kondo, Y.; Aoi, N.; Baba, H.; Bazin, D.; Fukuda, N.; Gomi, T.; Hasegawa, H.; Imai, N.; Ishihara, M.; Kobayashi, T.; Kubo, T.; Miura, M.; Motobayashi, T.; Otsu, H.; Saito, A.; Sakurai, H.; Shimoura, S.; Vinodkumar, A. M.; Watanabe, K.; Watanabe, Y. X.; Yakushiji, T.; Yanagisawa, Y.; Yoneda, K.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 654, No. 5-6, 18.10.2007, p. 160-164.

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

Sugimoto, T, Nakamura, T, Kondo, Y, Aoi, N, Baba, H, Bazin, D, Fukuda, N, Gomi, T, Hasegawa, H, Imai, N, Ishihara, M, Kobayashi, T, Kubo, T, Miura, M, Motobayashi, T, Otsu, H, Saito, A, Sakurai, H, Shimoura, S, Vinodkumar, AM, Watanabe, K, Watanabe, YX, Yakushiji, T, Yanagisawa, Y & Yoneda, K 2007, 'The first 2⁺ state of ¹⁴Be', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 654, no. 5-6, pp. 160-164. https://doi.org/10.1016/j.physletb.2007.08.052

Sugimoto, T. ; Nakamura, T. ; Kondo, Y. ; Aoi, N. ; Baba, H. ; Bazin, D. ; Fukuda, N. ; Gomi, T. ; Hasegawa, H. ; Imai, N. ; Ishihara, M. ; Kobayashi, T. ; Kubo, T. ; Miura, M. ; Motobayashi, T. ; Otsu, H. ; Saito, A. ; Sakurai, H. ; Shimoura, S. ; Vinodkumar, A. M. ; Watanabe, K. ; Watanabe, Y. X. ; Yakushiji, T. ; Yanagisawa, Y. ; Yoneda, K. / The first 2⁺ state of ¹⁴Be. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2007 ; Vol. 654, No. 5-6. pp. 160-164.

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title = "The first 2+ state of 14Be",

abstract = "The first excited state of the most neutron-rich beryllium isotope, 14Be, has been studied by inelastic scattering with a 12C target at 68 MeV / nucleon. The state has been observed at Ex = 1.54 (13) MeV, and its spin-parity has been determined as Jπ = 2+ from the measurement of the angular distribution. This provides a complete set of energies of the first 2+ states in the beryllium isotopic chain. The extracted deformation length of 14Be has been found to be substantially smaller than that of the neighboring nucleus 12Be, in which the N = 8 shell closure is quenched, indicating hindered collectivity in the 14Be nucleus.",

keywords = "Collectivity, Drip-line nucleus, Shell evolution",

author = "T. Sugimoto and T. Nakamura and Y. Kondo 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 T. Kubo and M. Miura and T. Motobayashi and H. Otsu and A. Saito and H. Sakurai and S. Shimoura and Vinodkumar, {A. M.} and K. Watanabe and Watanabe, {Y. X.} and T. Yakushiji and Y. Yanagisawa and K. Yoneda",

note = "Funding Information: Sincere gratitude is extended to the accelerator staff of RIKEN for their excellent operation of the beam delivery. Fruitful discussions with K. Muto, A. Umeya, and J.A. Tostevin are greatly appreciated. One of the authors, A.M. Vinodkumar, acknowledges JSPS for the award of postdoctoral fellowship. T. Sugimoto acknowledges the help of JRA scholarship from RIKEN. Y. Kondo acknowledges the JSPS grant. The present work was supported in part by a Grant-in-Aid for Scientific Research (No. 15540257) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan).",

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doi = "10.1016/j.physletb.2007.08.052",

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T1 - The first 2+ state of 14Be

AU - Sugimoto, T.

AU - Nakamura, T.

AU - Kondo, Y.

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 - Kubo, T.

AU - Miura, M.

AU - Motobayashi, T.

AU - Otsu, H.

AU - Saito, A.

AU - Sakurai, H.

AU - Shimoura, S.

AU - Vinodkumar, A. M.

AU - Watanabe, K.

AU - Watanabe, Y. X.

AU - Yakushiji, T.

AU - Yanagisawa, Y.

AU - Yoneda, K.

N1 - Funding Information: Sincere gratitude is extended to the accelerator staff of RIKEN for their excellent operation of the beam delivery. Fruitful discussions with K. Muto, A. Umeya, and J.A. Tostevin are greatly appreciated. One of the authors, A.M. Vinodkumar, acknowledges JSPS for the award of postdoctoral fellowship. T. Sugimoto acknowledges the help of JRA scholarship from RIKEN. Y. Kondo acknowledges the JSPS grant. The present work was supported in part by a Grant-in-Aid for Scientific Research (No. 15540257) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan).

PY - 2007/10/18

Y1 - 2007/10/18

N2 - The first excited state of the most neutron-rich beryllium isotope, 14Be, has been studied by inelastic scattering with a 12C target at 68 MeV / nucleon. The state has been observed at Ex = 1.54 (13) MeV, and its spin-parity has been determined as Jπ = 2+ from the measurement of the angular distribution. This provides a complete set of energies of the first 2+ states in the beryllium isotopic chain. The extracted deformation length of 14Be has been found to be substantially smaller than that of the neighboring nucleus 12Be, in which the N = 8 shell closure is quenched, indicating hindered collectivity in the 14Be nucleus.

AB - The first excited state of the most neutron-rich beryllium isotope, 14Be, has been studied by inelastic scattering with a 12C target at 68 MeV / nucleon. The state has been observed at Ex = 1.54 (13) MeV, and its spin-parity has been determined as Jπ = 2+ from the measurement of the angular distribution. This provides a complete set of energies of the first 2+ states in the beryllium isotopic chain. The extracted deformation length of 14Be has been found to be substantially smaller than that of the neighboring nucleus 12Be, in which the N = 8 shell closure is quenched, indicating hindered collectivity in the 14Be nucleus.

KW - Collectivity

KW - Drip-line nucleus

KW - Shell evolution

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