High-Resolution Gamma-Spectroscopy of Λ 7 Li and Λ 9 Be

Tamura, H.; Abe, D.; Ajimura, S.; Akikawa, H.; Araki, K.; Bhang, H. C.; Chrien, R. E.; Endo, T.; Eugenio, P.; Franklin, G. B.; Fujii, Y.; Fukuda, T.; Gan, L.; Hashimoto, O.; Hotchi, H.; Imai, K.; Kakiguchi, Y.; Khaustov, P.; Kim, J. H.; Kim, Y. D.; Kohri, H.; May, M.; Miyoshi, T.; Murakami, T.; Nagae, T.; Nakano, J.; Noumi, H.; Outa, H.; Ozawa, K.; Pile, P. H.; Quinn, B. P.; Rusek, A.; Saito, T.; Sasao, J.; Sato, Y.; Satoh, S.; Sawafta, R. I.; Schumacher, R. A.; Sekimoto, M.; Takahashi, T.; Tamagawa, T.; Tang, L.; Tanida, K.; Xia, H. H.; Yuan, L.; Zhou, S. H.; Zhu, L. H.; Zhu, X. F.

doi:10.1007/978-3-7091-6287-3_59

H. Tamura⁵,
D. Abe⁵,
S. Ajimura⁶,
H. Akikawa⁷,
K. Araki⁵,
H. C. Bhang⁸,
R. E. Chrien⁹,
T. Endo⁵,
P. Eugenio¹⁰,
G. B. Franklin¹⁰,
Y. Fujii⁵,
T. Fukuda¹¹,
L. Gan¹²,
O. Hashimoto⁵,
H. Hotchi¹³,
K. Imai⁷,
Y. Kakiguchi¹¹,
P. Khaustov¹⁰,
J. H. Kim⁸,
Y. D. Kim¹⁴,
H. Kohri⁶,
M. May⁹,
T. Miyoshi⁵,
T. Murakami⁷,
T. Nagae¹¹,
J. Nakano¹³,
H. Noumi¹¹,
H. Outa¹¹,
K. Ozawa⁵,
P. H. Pile⁹,
B. P. Quinn¹⁰,
A. Rusek⁹,
T. Saito¹⁵,
J. Sasao⁵,
Y. Sato⁵,
S. Satoh⁵,
R. I. Sawafta¹⁶,
R. A. Schumacher¹⁰,
M. Sekimoto¹¹,
T. Takahashi⁵,
T. Tamagawa¹³,
L. Tang¹²,
K. Tanida¹³,
H. H. Xia¹⁷,
L. Yuan¹²,
S. H. Zhou¹⁷,
L. H. Zhu^17,7 &
…
X. F. Zhu¹⁷

Part of the book series: Few-Body Systems ((FEWBODY,volume 12))

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Abstract

We report on the first two experiments of hypernuclear γ-ray spectroscopy with Hyperball, a large-acceptance germanium detector system. In a KEK experiment, we observed two γ transitions in ⁷_Λ Li, the spin- flip M1(3/2+ → 1/2+) at 691.7 ± 0.6^stat ± 1.0^sys keV and the E2(5/2+ → 1/2+) at 2050.4 ± 0.4^stat ± 0.7^sys keV. The former gives unambiguous information on the strength of the ΛN spin-spin interaction. B(E2) of the latter transition was measured to be \( 3.6 \pm {0.5^{stat}}\,_{ - 0.4}^{ + 0.5}{\,^{sys}}{e^2}f{m^4} \). In the second experiment at BNL, we observed the E2(5/2+, 3/2+ → 1/2+) transitions of ⁹_Λ Be at around 3.05 MeV.

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Authors and Affiliations

Department of Physics, Tohoku University, Sendai, 980-8578, Japan
H. Tamura, D. Abe, K. Araki, T. Endo, Y. Fujii, O. Hashimoto, T. Miyoshi, K. Ozawa, J. Sasao, Y. Sato, S. Satoh & T. Takahashi
Department of Physics, Osaka University, Toyonaka, 560-0043, Japan
S. Ajimura & H. Kohri
Department of Physics, Kyoto University, Kyoto, 606-8502, Japan
H. Akikawa, K. Imai, T. Murakami & L. H. Zhu
Department of Physics, Seoul National University, Seoul, 151-742, Korea
H. C. Bhang & J. H. Kim
Brookhaven National Laboratory, Upton, NY, 11973, USA
R. E. Chrien, M. May, P. H. Pile & A. Rusek
Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, USA
P. Eugenio, G. B. Franklin, P. Khaustov, B. P. Quinn & R. A. Schumacher
Institute of Particle and Nuclear Physics, KEK, Tsukuba, 305-0801, Japan
T. Fukuda, Y. Kakiguchi, T. Nagae, H. Noumi, H. Outa & M. Sekimoto
Department of Physics, Hampton University, Hampton, VA, 23668, USA
L. Gan, L. Tang & L. Yuan
Department of Physics, University of Tokyo, Tokyo, 113-0033, Japan
H. Hotchi, J. Nakano, T. Tamagawa & K. Tanida
Department of Physics, Sejong University, Seoul, 143-747, Korea
Y. D. Kim
Laboratory of Nuclear Science, Tohoku University, Sendai, 980-0826, Japan
T. Saito
North Carolina A&T State University, Greensboro, NC, 27411, USA
R. I. Sawafta
China Institute of Atomic Energy, Beijing, 102413, China
H. H. Xia, S. H. Zhou, L. H. Zhu & X. F. Zhu

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H. Tamura
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D. Abe
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S. Ajimura
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H. Akikawa
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K. Araki
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H. C. Bhang
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R. E. Chrien
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T. Endo
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P. Eugenio
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G. B. Franklin
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Y. Fujii
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T. Fukuda
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L. Gan
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O. Hashimoto
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H. Hotchi
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K. Imai
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Y. Kakiguchi
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P. Khaustov
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J. H. Kim
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Y. D. Kim
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H. Kohri
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M. May
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T. Miyoshi
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T. Murakami
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T. Nagae
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J. Nakano
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H. Noumi
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H. Outa
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K. Ozawa
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P. H. Pile
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B. P. Quinn
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A. Rusek
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T. Saito
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J. Sasao
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Y. Sato
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S. Satoh
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R. I. Sawafta
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R. A. Schumacher
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M. Sekimoto
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T. Takahashi
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T. Tamagawa
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L. Tang
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K. Tanida
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H. H. Xia
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L. Yuan
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S. H. Zhou
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L. H. Zhu
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X. F. Zhu
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Editor information

Editors and Affiliations

Department of Physics, Faculty of Science and Technology, Science University of Tokyo, Chiba, Japan
Shinsho Oryu
Department of Physics, Faculty of Science, Kyushu University, Fukuoka, Japan
Masayasu Kamimura
Department of Physics, Faculty of General Education, Hosei University, Tokyo, Japan
Souichi Ishikawa

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Tamura, H. et al. (2000). High-Resolution Gamma-Spectroscopy of ⁷_Λ Li and ⁹_Λ Be. In: Oryu, S., Kamimura, M., Ishikawa, S. (eds) Few-Body Problems in Physics ’99. Few-Body Systems, vol 12. Springer, Vienna. https://doi.org/10.1007/978-3-7091-6287-3_59

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DOI: https://doi.org/10.1007/978-3-7091-6287-3_59
Publisher Name: Springer, Vienna
Print ISBN: 978-3-7091-7247-6
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High-Resolution Gamma-Spectroscopy of 7 Λ Li and 9 Λ Be