Measurement of the B(e2) of (7)(lambda)Li and shrinkage of the hypernuclear size.
Measurement of the B(e2) of (7)(lambda)Li and shrinkage of the hypernuclear size.
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DOI：
10.1103/physrevlett.86.1982
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发表时间：
2001-03
影响因子：
8.6
通讯作者：
K. Tanida;M. Sekimoto;H. Xia;J. Sasao;T. Nagae;Y. Kakiguchi;H. Outa;D. Abe;H. Bhang;L. Zhu;T. Murakami;K. Araki;S. H. Zhou;K. Ozawa;S. Satoh;L. Tang;H. Tamura;T. Endo;H. Akikawa;Yeongduk Kim;T. Saito;R. Sawafta;H. Hotchi;J. Kim;H. Noumi;O. Hashimoto;Y. Fujii;Y. Sato;K. Imai;T. Miyoshi;T. Fukuda;T. Takahashi
中科院分区：
文献类型：
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作者：
K. Tanida;M. Sekimoto;H. Xia;J. Sasao;T. Nagae;Y. Kakiguchi;H. Outa;D. Abe;H. Bhang;L. Zhu;T. Murakami;K. Araki;S. H. Zhou;K. Ozawa;S. Satoh;L. Tang;H. Tamura;T. Endo;H. Akikawa;Yeongduk Kim;T. Saito;R. Sawafta;H. Hotchi;J. Kim;H. Noumi;O. Hashimoto;Y. Fujii;Y. Sato;K. Imai;T. Miyoshi;T. Fukuda;T. Takahashi
我们报道了超核伽马跃迁几率的第一次测量。用大接收锗探测器阵列(Hyperball)探测了(7)(Lambda)Li的E2(5/2(+)->；1/2(+))跃迁发射的伽马射线，并用多普勒频移衰减法测定了母态(5/2(+))的寿命。然后将得到的结果5.8(+0.9)(-0.7)+/-0.7ps转换为约化跃迁几率[B(E2)]为B(E2；5/2(+)->；1/2(+))=3.6+/-0.5(+0.5)(-0.4)e(2)Fm(4)。与6Li核中相应的E2(3(+)->；1(+))跃迁的B(E2)相比较，我们的结果证明了(7)(Lambda)Li中的6Li核的尺寸小于自由空间中的6Li核的尺寸。
We report on the first measurement of a hypernuclear gamma-transition probability. gamma rays emitted in the E2(5/2(+)-->1/2(+)) transition of (7)(Lambda)Li were detected by a large-acceptance germanium detector array (Hyperball), and the lifetime of the parent state ( 5/2(+)) was determined by the Doppler shift attenuation method. The obtained result, 5.8(+0.9)(-0.7)+/-0.7 ps, was then converted into the reduced transition probability [ B(E2)] to be B(E2;5/2(+)-->1/2(+)) = 3.6+/-0.5(+0.5)(-0.4) e(2) fm(4). Compared with the B(E2) of the corresponding E2(3(+)-->1(+)) transition in the 6Li nucleus, our result gives evidence that the size of the 6Li core in (7)(Lambda)Li is smaller than the 6Li nucleus in the free space.