Observation of a spin-flip M1 transition in 7(lambda)Li

Authors :: H, Tamura
K, Tanida
D, Abe
H, Akikawa
K, Araki
H, Bhang
T, Endo
Y, Fujii
T, Fukuda
O, Hashimoto
K, Imai
H, Hotchi
Y, Kakiguchi
J H, Kim
Y D, Kim
T, Miyoshi
T, Murakami
T, Nagae
H, Noumi
H, Outa
K, Ozawa
T, Saito
J, Sasao
Y, Sato
S, Satoh
R I, Sawafta
M, Sekimoto
T, Takahashi
L, Tang
H H, Xia
S H, Zhou
L H, Zhu
Source :: Physical review letters. 84(26 Pt 1)
Publication Year :: 2000
Abstract: Using a large-acceptance germanium detector array (Hyperball), we have observed a spin-flip M1 gamma transition between the ground-state spin doublet of (7)(Lambda)Li (3/2(+)--1/2(+)). The observed energy of 691.7+/-0.6(stat)+/-1.0(syst) keV provides crucial information on the strength of the spin-spin interaction between a Lambda and a nucleon. This is the first observation of well-identified hypernuclear gamma transitions using germanium detectors.

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