Observation of the 7 MeV excited spin-flip and non-spin-flip partners in 16 Λo by γ -ray spectroscopy

M. Ukai; S. Ajimura; H. Akikawa; D. E. Alburger; A. Banu; R. E. Chrien; G. B. Franklin; J. Franz; O. Hashimoto; T. Hayakawa; H. Hotchi; K. Imai; T. Kishimoto; M. May; D. J. Millener; S. Minami; Y. Miura; T. Miyoshi; K. Mizunuma; T. Nagae; S. N. Nakamura; K. Nakazawa; Y. Okayasu; P. Pile; B. P. Quinn; A. Rusek; Y. Sato; R. Sutter; H. Takahashi; L. Tang; H. Tamura; K. Tanida; L. Yuan; S. H. Zhou

doi:10.1140/epja/i2007-10473-7

Observation of the 7 MeV excited spin-flip and non-spin-flip partners in ¹⁶ _Λo by γ -ray spectroscopy

M. Ukai, S. Ajimura, H. Akikawa, D. E. Alburger, A. Banu, R. E. Chrien, G. B. Franklin, J. Franz, O. Hashimoto, T. Hayakawa, H. Hotchi, K. Imai, T. Kishimoto, M. May, D. J. Millener, S. Minami, Y. Miura, T. Miyoshi, K. Mizunuma, T. NagaeS. N. Nakamura, K. Nakazawa, Y. Okayasu, P. Pile, B. P. Quinn, A. Rusek, Y. Sato, R. Sutter, H. Takahashi, L. Tang, H. Tamura, K. Tanida, L. Yuan, S. H. Zhou

SCI - Physics

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

1 Citation (Scopus)

Abstract

We have observed three γ -ray transitions in _Λ ¹⁶ O from both 7MeV excited spin-flip and non-spin-flip partners ( 2^-, 1^- ₂ to the ground-state doublet ( 1 ^- ₁, 0^- via the ¹⁶O(K ^-,π^-) reaction. The 7MeV excitation energies of the spin-doublet members ( 2^-, 1^- ₂ were determined to be 6784±4±4 keV and 6562±1±2 keV, respectively, and thus the spacing was obtained to be 222±4±5 keV. This is the first observation of the spin-flip state directly populated by the ( K ^-,π^- reaction. Moreover, such directly populated spin-flip and non-spin-flip partners were resolved for the first time.

Original language	English
Pages (from-to)	247-250
Number of pages	4
Journal	European Physical Journal A
Volume	33
Issue number	3
DOIs	https://doi.org/10.1140/epja/i2007-10473-7
Publication status	Published - 2007 Sept 1

Keywords

13.75.Ev Hyperon-nucleon interactions
21.80.+a Hypernuclei
23.20.Lv γ transitions and level energies

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1140/epja/i2007-10473-7

Cite this

Ukai, M., Ajimura, S., Akikawa, H., Alburger, D. E., Banu, A., Chrien, R. E., Franklin, G. B., Franz, J., Hashimoto, O., Hayakawa, T., Hotchi, H., Imai, K., Kishimoto, T., May, M., Millener, D. J., Minami, S., Miura, Y., Miyoshi, T., Mizunuma, K., ... Zhou, S. H. (2007). Observation of the 7 MeV excited spin-flip and non-spin-flip partners in ¹⁶ _Λo by γ -ray spectroscopy. European Physical Journal A, 33(3), 247-250. https://doi.org/10.1140/epja/i2007-10473-7

Ukai, M, Ajimura, S, Akikawa, H, Alburger, DE, Banu, A, Chrien, RE, Franklin, GB, Franz, J, Hashimoto, O, Hayakawa, T, Hotchi, H, Imai, K, Kishimoto, T, May, M, Millener, DJ, Minami, S, Miura, Y, Miyoshi, T, Mizunuma, K, Nagae, T, Nakamura, SN, Nakazawa, K, Okayasu, Y, Pile, P, Quinn, BP, Rusek, A, Sato, Y, Sutter, R, Takahashi, H, Tang, L, Tamura, H, Tanida, K, Yuan, L & Zhou, SH 2007, 'Observation of the 7 MeV excited spin-flip and non-spin-flip partners in ¹⁶ _Λo by γ -ray spectroscopy', European Physical Journal A, vol. 33, no. 3, pp. 247-250. https://doi.org/10.1140/epja/i2007-10473-7

@article{4da933e867db4d62ad296262e970ff36,

title = "Observation of the 7 MeV excited spin-flip and non-spin-flip partners in 16 Λo by γ -ray spectroscopy",

abstract = "We have observed three γ -ray transitions in Λ 16 O from both 7MeV excited spin-flip and non-spin-flip partners ( 2-, 1- 2 to the ground-state doublet ( 1 - 1, 0- via the 16O(K -,π-) reaction. The 7MeV excitation energies of the spin-doublet members ( 2-, 1- 2 were determined to be 6784±4±4 keV and 6562±1±2 keV, respectively, and thus the spacing was obtained to be 222±4±5 keV. This is the first observation of the spin-flip state directly populated by the ( K -,π- reaction. Moreover, such directly populated spin-flip and non-spin-flip partners were resolved for the first time.",

keywords = "13.75.Ev Hyperon-nucleon interactions, 21.80.+a Hypernuclei, 23.20.Lv γ transitions and level energies",

author = "M. Ukai and S. Ajimura and H. Akikawa and Alburger, {D. E.} and A. Banu and Chrien, {R. E.} and Franklin, {G. B.} and J. Franz and O. Hashimoto and T. Hayakawa and H. Hotchi and K. Imai and T. Kishimoto and M. May and Millener, {D. J.} and S. Minami and Y. Miura and T. Miyoshi and K. Mizunuma and T. Nagae and Nakamura, {S. N.} and K. Nakazawa and Y. Okayasu and P. Pile and Quinn, {B. P.} and A. Rusek and Y. Sato and R. Sutter and H. Takahashi and L. Tang and H. Tamura and K. Tanida and L. Yuan and Zhou, {S. H.}",

year = "2007",

month = sep,

day = "1",

doi = "10.1140/epja/i2007-10473-7",

language = "English",

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journal = "European Physical Journal A",

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T1 - Observation of the 7 MeV excited spin-flip and non-spin-flip partners in 16 Λo by γ -ray spectroscopy

AU - Ukai, M.

AU - Ajimura, S.

AU - Akikawa, H.

AU - Alburger, D. E.

AU - Banu, A.

AU - Chrien, R. E.

AU - Franklin, G. B.

AU - Franz, J.

AU - Hashimoto, O.

AU - Hayakawa, T.

AU - Hotchi, H.

AU - Imai, K.

AU - Kishimoto, T.

AU - May, M.

AU - Millener, D. J.

AU - Minami, S.

AU - Miura, Y.

AU - Miyoshi, T.

AU - Mizunuma, K.

AU - Nagae, T.

AU - Nakamura, S. N.

AU - Nakazawa, K.

AU - Okayasu, Y.

AU - Pile, P.

AU - Quinn, B. P.

AU - Rusek, A.

AU - Sato, Y.

AU - Sutter, R.

AU - Takahashi, H.

AU - Tang, L.

AU - Tamura, H.

AU - Tanida, K.

AU - Yuan, L.

AU - Zhou, S. H.

PY - 2007/9/1

Y1 - 2007/9/1

N2 - We have observed three γ -ray transitions in Λ 16 O from both 7MeV excited spin-flip and non-spin-flip partners ( 2-, 1- 2 to the ground-state doublet ( 1 - 1, 0- via the 16O(K -,π-) reaction. The 7MeV excitation energies of the spin-doublet members ( 2-, 1- 2 were determined to be 6784±4±4 keV and 6562±1±2 keV, respectively, and thus the spacing was obtained to be 222±4±5 keV. This is the first observation of the spin-flip state directly populated by the ( K -,π- reaction. Moreover, such directly populated spin-flip and non-spin-flip partners were resolved for the first time.

AB - We have observed three γ -ray transitions in Λ 16 O from both 7MeV excited spin-flip and non-spin-flip partners ( 2-, 1- 2 to the ground-state doublet ( 1 - 1, 0- via the 16O(K -,π-) reaction. The 7MeV excitation energies of the spin-doublet members ( 2-, 1- 2 were determined to be 6784±4±4 keV and 6562±1±2 keV, respectively, and thus the spacing was obtained to be 222±4±5 keV. This is the first observation of the spin-flip state directly populated by the ( K -,π- reaction. Moreover, such directly populated spin-flip and non-spin-flip partners were resolved for the first time.

KW - 13.75.Ev Hyperon-nucleon interactions

KW - 21.80.+a Hypernuclei

KW - 23.20.Lv γ transitions and level energies

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JO - European Physical Journal A

JF - European Physical Journal A

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