Measurement of Gamma-Rays from 11ΛB and 12ΛC

Chin. Phys. Lett.

2007, Vol. 24

Issue (8): 2216-2218 DOI:

Original Articles

Measurement of Gamma-Rays from 11ΛB and 12ΛC

FU Yuan-Yong1;ZHOU Shu-Hua1;T. Koike2;S. Kinoshita2;Y. Ma2;Y. Miura2;K. Miwa2;Y. Miyagi2;K. Shirotori2;T. Suzuki2;H. Tamura2;K. Tsukada2;M. Ukai2;K. Futatsukawa2;K. Hosomi2;M. Kawai2;M. Mimori2;N. Terada2;N. Maruyama2;K. Aoki3;H. Fujioka3;Y. Kakiguchi3; T. Nagae3;D. Nakajima3;H. Noumi3;T. Takahashi3;T.N. Takahashi3;A. Toyota3;M. Dairaku4;T. Fukuda5;S. Minami5;W. Imoto5;S. Ajimura6;K. Tanida7

¹China Institute of Atomic Energy, PO Box 275(18), Beijing 102413²Department of Physics, Tohoku University, Sendai, 980-8578, Japan³High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki, 305-0801, Japan⁴Department of Physics, Kyoto University, Kyoto, 606-8502, Japan⁵Osaka Electro-Communication University, Osaka, 572-8530, Japan⁶Department of Physics, Osaka University, Osaka, 560-0043, Japan⁷RIKEN, Wako 351-0198, Japan

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FU Yuan-Yong, ZHOU Shu-Hua, T. Koike et al 2007 Chin. Phys. Lett. 24 2216-2218

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Abstract From the ¹²C(π⁺, K⁺)¹²_ΛC reaction, the γ-rays of 261.6±0.24keV (7/2⁺→to
5/2⁺) and 1481.7±0.7keV (1/2⁺±5/2⁺) of ¹¹_ΛB, and 2667.3±2.8keV (1₂^-→to 2₁^-) of ¹²_ΛC hypernuclei have been identified using a large germanium detector array Hyperball2 at K6 beam line of KEK. The observed energies of the transitions 1481.7keV and 261.6keV are significantly different from the values predicted by the shell model using the △ and S_N parameters determined from the ⁷_ΛLi data.

Keywords: 21.80.+a 23.20.Lv 25.80.Hp 13.75.Ev

Received: 28 February 2007 Published: 25 July 2007

PACS:	21.80.+a	(Hypernuclei)
	23.20.Lv	(γ-transitions and level energies)
	25.80.Hp	(Pion-induced reactions)
	13.75.Ev

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I8/02216

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Articles by authors
	FU Yuan-Yong
	ZHOU Shu-Hua
	T. Koike
	S. Kinoshita
	Y. Ma
	Y. Miura
	K. Miwa
	Y. Miyagi
	K. Shirotori
	T. Suzuki
	H. Tamura
	K. Tsukada
	M. Ukai
	K. Futatsukawa
	K. Hosomi
	M. Kawai
	M. Mimori
	N. Terada
	N. Maruyama
	K. Aoki
	H. Fujioka
	Y. Kakiguchi
	T. Nagae
	D. Nakajima
	H. Noumi
	T. Takahashi
	T.N. Takahashi
	A. Toyota
	M. Dairaku
	T. Fukuda
	S. Minami
	W. Imoto
	S. Ajimura
	K. Tanida

[1] Millener D J et al 1985 Phys. Rev. C 31499
[2] Tamura H et al 2000 Phys. Rev. Lett. 845963
[3] Akikawa H et al 2002 Phys. Rev. Lett. 88082501
[4] Ukai M et al 2004 Phys. Rev. Lett. 93232501
[5] Tanaka K H et al 1986 Nucl. Phys. A 450 533c
[6] Fukuda T et al 1995 Nucl. Instrum. Methods A 361485
[7] Miura Y et al 2005 Nucl. Phys. A 754 75c
[8] Miura Y et al 2004 Acta Phys. Polon. 1019 B35
[9] Dalitz R H,Davis D H and Tovee D N 1986 Nucl. Phys. A 450 311c
[10] Hotchi H PhD Thesis (Graduate School of University ofTokyo)
[11] Millener D J private communication

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