Low-lying intruder state of the unbound nucleus 13Be

Y. Kondo; T. Nakamura; Y. Satou; T. Matsumoto; N. Aoi; N. Endo; N. Fukuda; T. Gomi; Y. Hashimoto; M. Ishihara; S. Kawai; M. Kitayama; T. Kobayashi; Y. Matsuda; N. Matsui; T. Motobayashi; T. Nakabayashi; T. Okumura; H. J. Ong; T. K. Onishi; K. Ogata; H. Otsu; H. Sakurai; S. Shimoura; M. Shinohara; T. Sugimoto; S. Takeuchi; M. Tamaki; Y. Togano; Y. Yanagisawa

doi:10.1016/j.physletb.2010.05.031

Low-lying intruder state of the unbound nucleus ¹³Be

Y. Kondo, T. Nakamura, Y. Satou, T. Matsumoto, N. Aoi, N. Endo, N. Fukuda, T. Gomi, Y. Hashimoto, M. Ishihara, S. Kawai, M. Kitayama, T. Kobayashi, Y. Matsuda, N. Matsui, T. Motobayashi, T. Nakabayashi, T. Okumura, H. J. Ong, T. K. OnishiK. Ogata, H. Otsu, H. Sakurai, S. Shimoura, M. Shinohara, T. Sugimoto, S. Takeuchi, M. Tamaki, Y. Togano, Y. Yanagisawa

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

65 Citations (Scopus)

Abstract

An experimental study for the unbound nucleus ¹³Be has been performed by means of the invariant mass method via the one-neutron removal reaction ¹H (¹⁴Be, ¹²Be + n). A resonance has been observed at 0.51(1) MeV in the relative energy (E_rel) spectrum of the ¹²Be + n system. The transverse momentum distribution of the ¹²Be + n system as well as the resonance width of 0.45(3) MeV gives evidence for the p-wave nature of the resonance. A d-wave resonance has also been observed at 2.39(5) MeV in the E_rel spectrum. The observation of the low-lying p-wave resonance indicates the disappearance of the N = 8 magicity in the vicinity of the neutron drip line region.

Original language	English
Pages (from-to)	245-249
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	690
Issue number	3
DOIs	https://doi.org/10.1016/j.physletb.2010.05.031
Publication status	Published - 2010 Jun 21

Keywords

H (Be, Be + n)
Intruder state
Unbound nucleus

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.physletb.2010.05.031

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Kondo, Y., Nakamura, T., Satou, Y., Matsumoto, T., Aoi, N., Endo, N., Fukuda, N., Gomi, T., Hashimoto, Y., Ishihara, M., Kawai, S., Kitayama, M., Kobayashi, T., Matsuda, Y., Matsui, N., Motobayashi, T., Nakabayashi, T., Okumura, T., Ong, H. J., ... Yanagisawa, Y. (2010). Low-lying intruder state of the unbound nucleus ¹³Be. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 690(3), 245-249. https://doi.org/10.1016/j.physletb.2010.05.031

Low-lying intruder state of the unbound nucleus ¹³Be. / Kondo, Y.; Nakamura, T.; Satou, Y.; Matsumoto, T.; Aoi, N.; Endo, N.; Fukuda, N.; Gomi, T.; Hashimoto, Y.; Ishihara, M.; Kawai, S.; Kitayama, M.; Kobayashi, T.; Matsuda, Y.; Matsui, N.; Motobayashi, T.; Nakabayashi, T.; Okumura, T.; Ong, H. J.; Onishi, T. K.; Ogata, K.; Otsu, H.; Sakurai, H.; Shimoura, S.; Shinohara, M.; Sugimoto, T.; Takeuchi, S.; Tamaki, M.; Togano, Y.; Yanagisawa, Y.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 690, No. 3, 21.06.2010, p. 245-249.

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

Kondo, Y, Nakamura, T, Satou, Y, Matsumoto, T, Aoi, N, Endo, N, Fukuda, N, Gomi, T, Hashimoto, Y, Ishihara, M, Kawai, S, Kitayama, M, Kobayashi, T, Matsuda, Y, Matsui, N, Motobayashi, T, Nakabayashi, T, Okumura, T, Ong, HJ, Onishi, TK, Ogata, K, Otsu, H, Sakurai, H, Shimoura, S, Shinohara, M, Sugimoto, T, Takeuchi, S, Tamaki, M, Togano, Y & Yanagisawa, Y 2010, 'Low-lying intruder state of the unbound nucleus ¹³Be', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 690, no. 3, pp. 245-249. https://doi.org/10.1016/j.physletb.2010.05.031

Kondo, Y. ; Nakamura, T. ; Satou, Y. ; Matsumoto, T. ; Aoi, N. ; Endo, N. ; Fukuda, N. ; Gomi, T. ; Hashimoto, Y. ; Ishihara, M. ; Kawai, S. ; Kitayama, M. ; Kobayashi, T. ; Matsuda, Y. ; Matsui, N. ; Motobayashi, T. ; Nakabayashi, T. ; Okumura, T. ; Ong, H. J. ; Onishi, T. K. ; Ogata, K. ; Otsu, H. ; Sakurai, H. ; Shimoura, S. ; Shinohara, M. ; Sugimoto, T. ; Takeuchi, S. ; Tamaki, M. ; Togano, Y. ; Yanagisawa, Y. / Low-lying intruder state of the unbound nucleus ¹³Be. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2010 ; Vol. 690, No. 3. pp. 245-249.

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title = "Low-lying intruder state of the unbound nucleus 13Be",

abstract = "An experimental study for the unbound nucleus 13Be has been performed by means of the invariant mass method via the one-neutron removal reaction 1H (14Be, 12Be + n). A resonance has been observed at 0.51(1) MeV in the relative energy (Erel) spectrum of the 12Be + n system. The transverse momentum distribution of the 12Be + n system as well as the resonance width of 0.45(3) MeV gives evidence for the p-wave nature of the resonance. A d-wave resonance has also been observed at 2.39(5) MeV in the Erel spectrum. The observation of the low-lying p-wave resonance indicates the disappearance of the N = 8 magicity in the vicinity of the neutron drip line region.",

keywords = "H (Be, Be + n), Intruder state, Unbound nucleus",

author = "Y. Kondo and T. Nakamura and Y. Satou and T. Matsumoto and N. Aoi and N. Endo and N. Fukuda and T. Gomi and Y. Hashimoto and M. Ishihara and S. Kawai and M. Kitayama and T. Kobayashi and Y. Matsuda and N. Matsui and T. Motobayashi and T. Nakabayashi and T. Okumura and Ong, {H. J.} and Onishi, {T. K.} and K. Ogata and H. Otsu and H. Sakurai and S. Shimoura and M. Shinohara and T. Sugimoto and S. Takeuchi and M. Tamaki and Y. Togano and Y. Yanagisawa",

note = "Funding Information: The authors thank the accelerator staff of RIKEN for their excellent operation of the beam delivery. Fruitful discussions with I. Hamamoto and A. Umeya are greatly appreciated. The present work was supported in part by a Grant-in-Aid (No. 17-008371 ) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan) . One of the authors (Y.K.) is grateful for the financial assistance from the Special Postdoctoral Researcher Program of RIKEN. The supports from the 21st Century COE program “Nanometer-Scale Quantum Physics” and Global COE program “Nanoscience and Quantum Physics” at Tokyo Tech by MEXT are also acknowledged.",

year = "2010",

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doi = "10.1016/j.physletb.2010.05.031",

language = "English",

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pages = "245--249",

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T1 - Low-lying intruder state of the unbound nucleus 13Be

AU - Kondo, Y.

AU - Nakamura, T.

AU - Satou, Y.

AU - Matsumoto, T.

AU - Aoi, N.

AU - Endo, N.

AU - Fukuda, N.

AU - Gomi, T.

AU - Hashimoto, Y.

AU - Ishihara, M.

AU - Kawai, S.

AU - Kitayama, M.

AU - Kobayashi, T.

AU - Matsuda, Y.

AU - Matsui, N.

AU - Motobayashi, T.

AU - Nakabayashi, T.

AU - Okumura, T.

AU - Ong, H. J.

AU - Onishi, T. K.

AU - Ogata, K.

AU - Otsu, H.

AU - Sakurai, H.

AU - Shimoura, S.

AU - Shinohara, M.

AU - Sugimoto, T.

AU - Takeuchi, S.

AU - Tamaki, M.

AU - Togano, Y.

AU - Yanagisawa, Y.

N1 - Funding Information: The authors thank the accelerator staff of RIKEN for their excellent operation of the beam delivery. Fruitful discussions with I. Hamamoto and A. Umeya are greatly appreciated. The present work was supported in part by a Grant-in-Aid (No. 17-008371 ) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT, Japan) . One of the authors (Y.K.) is grateful for the financial assistance from the Special Postdoctoral Researcher Program of RIKEN. The supports from the 21st Century COE program “Nanometer-Scale Quantum Physics” and Global COE program “Nanoscience and Quantum Physics” at Tokyo Tech by MEXT are also acknowledged.

PY - 2010/6/21

Y1 - 2010/6/21

N2 - An experimental study for the unbound nucleus 13Be has been performed by means of the invariant mass method via the one-neutron removal reaction 1H (14Be, 12Be + n). A resonance has been observed at 0.51(1) MeV in the relative energy (Erel) spectrum of the 12Be + n system. The transverse momentum distribution of the 12Be + n system as well as the resonance width of 0.45(3) MeV gives evidence for the p-wave nature of the resonance. A d-wave resonance has also been observed at 2.39(5) MeV in the Erel spectrum. The observation of the low-lying p-wave resonance indicates the disappearance of the N = 8 magicity in the vicinity of the neutron drip line region.

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KW - H (Be, Be + n)

KW - Intruder state

KW - Unbound nucleus

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