β-Delayed Proton Decays of 140Tb and 141Dy as Well as the Spin and Parity of 143Dy

XU Shu-Wei; XIE Yuan-Xiang; XING Ye-Bing; XU Fu-Rong; LIU Hong-Liang; LI Zhan-Kui

Chinese Physics C> 2006, Vol. 30> Issue(6) : 526-529

β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Department of Technical Physics, Peking University, Beijing 100871, China

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Abstract：
¹⁴⁰Tb and ¹⁴¹Dy were produced via fusion evaporation in the reaction ⁴⁰Ca+¹⁰⁶Cd. Their β-delayed proton decays were studied by means of “p-γ” coincidence in combination with a He-jet tape transport system, including half-lives, proton energy spectra, γ-transitions following the proton emissions, and the branching ratios to the low-lying states in the grand-daughter nuclei. The ground-state spins and parities of 140Tb and 141Dy were extracted as 7^± and 9/2^±, respectively, by fitting the experimental data with a statistical model calculation. The configuration-constrained nuclear potential energy surfaces (NPES) of ¹⁴⁰Tb and ¹⁴¹Dy were calculated by using the Woods-Saxon Strutinsky method, which indicate the ground-state spins and parities of ¹⁴⁰Tb and ¹⁴¹Dy to be 7⁺and 9/2^－, respectively. In addition, the configuration-constrained NPES of ¹⁴³Dy was also calculated by using the same method. From the NPES a 1/2⁺ ground state and a 11/2^－ isomer with the excitation energy of 198keV were found. The calculated results are consistent with our experimental data on the decay of ¹⁴³Dy reported in Eur. Phys. J., 2003, A16: 347—351.

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[1]

. Wilmarth P A, Nitschke J M, Firestone R B et al. Z. Phys.,1986, A325: 485—4862. Gilat J, Nitschke J M, Wilmarth P A et al. Phys. Rev.,1989, C40: 2249—22593. Firestone R B, Gilat J, Nitschke J M et al. Phys. Rev.,1991, C43: 1066—10854. XU S W, XIE Y X, YU Y et al. Eur. Phys. J., 2000, A8:437—4395. XU S W, XIE Y X, LI Z K et al. Phys. Rev., 1999, C60:061302(R)6. XU S W, XIE Y X, LI Z K et al. Z. Phys., 1996, A356:227—2297. LI Z K, XU S W, XIE Y X et al. Phys. Rev., 1997, C56:1157—11598. Burrows T W. Nucl. Data Sheets, 2001, 92: 759—7679. Peker L K. Nucl. Data Sheets, 1994, 73: 261—35010. Hornshoj P,Wilsky K, Hansen P G et al. Nucl. Phys., 1972,A187: 609—62311. Takahashi K, Yamada M, Kondoh T. At. Data Nucl. DataTables, 1973, 12: 101—14212. Nazarewicz W, Dudek J, Bengtsson R et al. Nucl. Phys.,1985, A435: 397—44713. Audi G, Bersillon O, Blachot J et al. Nucl. Phys., 1997,A624: 1—12414. Tuli J K. Nucl. Data Sheets, 2001, 94: 771—77715. XU S W, XIE Y X, LI Z K et al. Eur. Phys. J., 2003, A16:347—351

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[6]	XIE Cheng-Ying , ZHOU Xiao-Hong , ZHENG Yong , ZHANG Yu-Hu , LIU Zhong , PAN Qiang-Yan , GAN Zai-Guo . Study of Level Structure in ¹⁴⁶Tb. Chinese Physics C, 2003, 27(10): 884-887.
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[8]	ZHENG Yong , ZHOU Xiao-Hong , ZHANG Yu-Hu , LIU Zhong , PAN Qiang-Yan , GAN Zai-Guo , , , , , , , , , . Level Scheme of High-Spin States in ¹⁴⁵Tb. Chinese Physics C, 2002, 26(4): 359-363.
[9]	WU Chong-Shi . Signature Partners in Superdeformed ¹⁴⁹Tb. Chinese Physics C, 2001, 25(3): 205-211.
[10]	HE Jian-Jun , ZHANG Yu-Hu , GUO Ying-Xiang , ZHOU Xiao-Hong , LEI Xiang-Guo , HUANG Wen-Xue , FENG Xi-Chen , ZHANG Shuang-Quan , XU Xiao , LIU Zhong , LUO Yi-Xiao , WEN Shu-Xian , WU Xiao-Guang , YUAN Guan-Jun . Investigation of High-Spin States in ¹⁴³Pm. Chinese Physics C, 2001, 25(9): 828-833.
[11]	YU Yong , XIE Yuan-Xiang , XU Shu-Wei , LI Zhan-Kui , PAN Qiang-Yan , WANG Chun-Fang , XING Jian-Ping , ZHANG Tian-Mei . (EC/β⁺) Decay of ¹³⁰Nd and ¹⁴⁰Tb. Chinese Physics C, 2001, 25(2): 108-114.
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[13]	Sang Jianping , Liu Yong . Microscopic Investigation of High-Spin States for Even-Even Nuclei (Part 2): Application to isotones ¹⁵⁴Dy, ¹⁵⁶Er and ¹⁵⁸Yb. Chinese Physics C, 1994, 18(S4): 407-414.
[14]	SHEN Qixing , YU Hong . Determination of the Spin-parity of the Boson Resonance X for the Process J/ψ→V₁+X,X→γ+V₂. Chinese Physics C, 1993, 17(11): 988-992.
[15]	SHEN Qi-Xing , YU Hong . Determining the Spin and Parity of Particle X for the Process J/ψ→V₁,X→V₂+V₃ by Using the Generalized Moment Analysis Method. Chinese Physics C, 1993, 17(6): 503-510.
[16]	Zhu Shengjiang , Ma Wenchao , Ahmad , B. Dichter , H. Emling , R. Holzman , R. V. F. Janssens , T. L. Khoo , M. Quader , P. J. Daly , Z. Grabowski , M. Piiparinen , W. Trzaska , M. W. Drigert , U. Garg . High Spin Level Structure in ¹⁵³Dy and Shape Changes in Neutron-Deficient Dy Nuclei. Chinese Physics C, 1991, 15(S2): 165-171.
[17]	YAN Wu-Guang . ON THE SENSITIVE AREA OF SPIN-PARITY ANALYSIS FOR J/ψ RADIATIVE DECAY PRODUCTS INTO TWO PSEUDOSCALARS. Chinese Physics C, 1990, 14(3): 193-199.
[18]	ZHU Sheng-Jiang , MA Wen-Chao . LEVEL STRUCTURE OF ¹⁵³Dy IN HIGH SPIN STATES AND SHAPE CHANGES WITH N AND I IN Dy NUCLEI. Chinese Physics C, 1990, 14(12): 1103-1109.
[19]	WANG BAO-AN , FENG JIA-ZHEN , LIU ZHAO-YUAN , YANG HUA-ZHONG , YAO LI-SHAN . THE MECHANISM OF THE REACTION ¹⁴¹pr(n,α)¹³⁸La AT En=14 MeV. Chinese Physics C, 1981, 5(5): 636-640.
[20]	LI ZI-PING . THE G_s PARITY OF STRANGE MESONS AND THE SELECTION RULE IN STRONG DECAY OF RESONANCE STATE. Chinese Physics C, 1981, 5(3): 372-373.

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XU Shu-Wei, XIE Yuan-Xiang, XING Ye-Bing, XU Fu-Rong, LIU Hong-Liang and LI Zhan-Kui. β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy[J]. Chinese Physics C, 2006, 30(6): 526-529.

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Received: 2005-11-18
Revised: 2006-01-10

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沈阳化工大学材料科学与工程学院沈阳 110142

β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy

Corresponding author: XU Shu-Wei,

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China2 Department of Technical Physics, Peking University, Beijing 100871, China

Received Date: 2005-11-18

Accepted Date: 2006-01-10

Available Online: 2006-06-05

Abstract: ¹⁴⁰Tb and ¹⁴¹Dy were produced via fusion evaporation in the reaction ⁴⁰Ca+¹⁰⁶Cd. Their β-delayed proton decays were studied by means of “p-γ” coincidence in combination with a He-jet tape transport system, including half-lives, proton energy spectra, γ-transitions following the proton emissions, and the branching ratios to the low-lying states in the grand-daughter nuclei. The ground-state spins and parities of 140Tb and 141Dy were extracted as 7^± and 9/2^±, respectively, by fitting the experimental data with a statistical model calculation. The configuration-constrained nuclear potential energy surfaces (NPES) of ¹⁴⁰Tb and ¹⁴¹Dy were calculated by using the Woods-Saxon Strutinsky method, which indicate the ground-state spins and parities of ¹⁴⁰Tb and ¹⁴¹Dy to be 7⁺and 9/2^－, respectively. In addition, the configuration-constrained NPES of ¹⁴³Dy was also calculated by using the same method. From the NPES a 1/2⁺ ground state and a 11/2^－ isomer with the excitation energy of 198keV were found. The calculated results are consistent with our experimental data on the decay of ¹⁴³Dy reported in Eur. Phys. J., 2003, A16: 347—351.

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β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy

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β-Delayed Proton Decays of ¹⁴⁰Tb and ¹⁴¹Dy as Well as the Spin and Parity of ¹⁴³Dy

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