Study of Level Structure in <SUP>146</SUP>Tb

XIE Cheng-Ying; ZHOU Xiao-Hong; ZHENG Yong; ZHANG Yu-Hu; LIU Zhong; PAN Qiang-Yan; GAN Zai-Guo

Chinese Physics C> 2003, Vol. 27> Issue(10) : 884-887

Study of Level Structure in ¹⁴⁶Tb

Institue of Modern Physics,CAS,Lanzhou 730000,China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan3 Chiba University,Inage-ku,Chiba 263-8512,Japan4 Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan

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Abstract：
The level structure of high-spin states of doubly odd nucleus ^l46Tb has been studied via the ¹¹⁸Sn (³²S, 1p3n) Tb reaction using techniques of in-beam y-ray spectroscopy. Measurements of r-ray excitation functions, y-ray anisotropies, X-r and r-r-t coincidences were performed with 12 BGO(AC)HPGe detectors. Based on the gated spectra, r-r coincidence relationships, intensity balances and cross-over transitions, the level scheme in ¹⁴⁶Tb has been extended up to an excitation energy of 8390 keV, and 41 new 7-rays are added into the level scheme. The spins for the new established levels have been assigned according to the results of the measured 7-ray anisotropies. The levels in ¹⁴⁶Tb are interpreted qualitatively by coupling a h_11/2 proton to a h_11/2 neutron hole and h_11/2 υ h11/2^－1 to the excited states in ¹⁴⁶Gd core.

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XIE Cheng-Ying, ZHOU Xiao-Hong, ZHENG Yong, ZHANG Yu-Hu, LIU Zhong, PAN Qiang-Yan and GAN Zai-Guo. Study of Level Structure in ¹⁴⁶Tb[J]. Chinese Physics C, 2003, 27(10): 884-887.

XIE Cheng-Ying, ZHOU Xiao-Hong, ZHENG Yong, ZHANG Yu-Hu, LIU Zhong, PAN Qiang-Yan and GAN Zai-Guo. Study of Level Structure in ¹⁴⁶Tb[J]. Chinese Physics C, 2003, 27(10): 884-887. shu

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Received: 2003-01-07
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Study of Level Structure in ¹⁴⁶Tb

Corresponding author: ZHOU Xiao-Hong,

Institue of Modern Physics,CAS,Lanzhou 730000,China2 Japan Atomic Energy Research Institute,Tokai,Ibaraki 319-1195,Japan3 Chiba University,Inage-ku,Chiba 263-8512,Japan4 Chiba Institute of Technology,Narashino,Chiba 275-0023,Japan

Received Date: 2003-01-07

Accepted Date: 1900-01-01

Available Online: 2003-10-05

Abstract: The level structure of high-spin states of doubly odd nucleus ^l46Tb has been studied via the ¹¹⁸Sn (³²S, 1p3n) Tb reaction using techniques of in-beam y-ray spectroscopy. Measurements of r-ray excitation functions, y-ray anisotropies, X-r and r-r-t coincidences were performed with 12 BGO(AC)HPGe detectors. Based on the gated spectra, r-r coincidence relationships, intensity balances and cross-over transitions, the level scheme in ¹⁴⁶Tb has been extended up to an excitation energy of 8390 keV, and 41 new 7-rays are added into the level scheme. The spins for the new established levels have been assigned according to the results of the measured 7-ray anisotropies. The levels in ¹⁴⁶Tb are interpreted qualitatively by coupling a h_11/2 proton to a h_11/2 neutron hole and h_11/2 υ h11/2^－1 to the excited states in ¹⁴⁶Gd core.

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