Cascade γ decay in the Λ7Li hypernucleus

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:10.1103/PhysRevC.73.012501

Cascade γ decay in the Λ7Li hypernucleus

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

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Abstract

In a γ-ray spectroscopy experiment with the (K-,π-) reaction on a B10 target, we have observed the 7/2+→5/2+ spin-flip M1 transition in Λ7Li via γ-γ coincidence with the 5/2+→1/2+E2 transition. This is the first successful γ-γ coincidence measurement for hypernuclei. The measured M1γ-ray energy is 470.8±1.9(stat) ±0.6(syst) keV. The spacing of the 7/2+,5/2+ doublet is consistently explained using the strengths of the spin-spin, Λ-spin-orbit, and tensor interactions obtained from previous γ-spectroscopy experiments.

Original language	English
Article number	012501
Journal	Physical Review C - Nuclear Physics
Volume	73
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevC.73.012501
Publication status	Published - 2006 Jan

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1103/PhysRevC.73.012501

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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. (2006). Cascade γ decay in the Λ7Li hypernucleus. Physical Review C - Nuclear Physics, 73(1), [012501]. https://doi.org/10.1103/PhysRevC.73.012501

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 2006, 'Cascade γ decay in the Λ7Li hypernucleus', Physical Review C - Nuclear Physics, vol. 73, no. 1, 012501. https://doi.org/10.1103/PhysRevC.73.012501

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title = "Cascade γ decay in the Λ7Li hypernucleus",

abstract = "In a γ-ray spectroscopy experiment with the (K-,π-) reaction on a B10 target, we have observed the 7/2+→5/2+ spin-flip M1 transition in Λ7Li via γ-γ coincidence with the 5/2+→1/2+E2 transition. This is the first successful γ-γ coincidence measurement for hypernuclei. The measured M1γ-ray energy is 470.8±1.9(stat) ±0.6(syst) keV. The spacing of the 7/2+,5/2+ doublet is consistently explained using the strengths of the spin-spin, Λ-spin-orbit, and tensor interactions obtained from previous γ-spectroscopy experiments.",

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 = "2006",

month = jan,

doi = "10.1103/PhysRevC.73.012501",

language = "English",

volume = "73",

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T1 - Cascade γ decay in the Λ7Li hypernucleus

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 - 2006/1

Y1 - 2006/1

N2 - In a γ-ray spectroscopy experiment with the (K-,π-) reaction on a B10 target, we have observed the 7/2+→5/2+ spin-flip M1 transition in Λ7Li via γ-γ coincidence with the 5/2+→1/2+E2 transition. This is the first successful γ-γ coincidence measurement for hypernuclei. The measured M1γ-ray energy is 470.8±1.9(stat) ±0.6(syst) keV. The spacing of the 7/2+,5/2+ doublet is consistently explained using the strengths of the spin-spin, Λ-spin-orbit, and tensor interactions obtained from previous γ-spectroscopy experiments.

AB - In a γ-ray spectroscopy experiment with the (K-,π-) reaction on a B10 target, we have observed the 7/2+→5/2+ spin-flip M1 transition in Λ7Li via γ-γ coincidence with the 5/2+→1/2+E2 transition. This is the first successful γ-γ coincidence measurement for hypernuclei. The measured M1γ-ray energy is 470.8±1.9(stat) ±0.6(syst) keV. The spacing of the 7/2+,5/2+ doublet is consistently explained using the strengths of the spin-spin, Λ-spin-orbit, and tensor interactions obtained from previous γ-spectroscopy experiments.

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Cascade γ decay in the Λ7Li hypernucleus

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