Chinese Physics C > 2001, Vol. 25 > Issue(2): 108-114

(EC/β⁺) Decay of¹³⁰Nd and¹⁴⁰Tb

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

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Abstract：
Isotopes, ¹³⁰Nd and ¹⁴⁰Tb were produced using enriched targets ⁹⁶Ru and ¹⁰⁶Cd, respectively,bombarded by ³⁶Ar ion beam. The two nuclides were identified and studied by a He-jet tape transport system in combination with "X-γ" and "γ-γ" coincidence measure- ments. The half-life of ¹³⁰Nd was determined to be (13±2)s. The EC/β ⁺decay scheme of 130Nd was proposed for the first time, and the spins and parties of the ground-state and observed low-lying states in the daughter nucleus ¹³⁰Pr were speculated tentatively. The previous simple EC/β ⁺decay scheme of ¹⁴⁰Tb was revised, and the spin-parity of its groundstate was assigned to be 7 ⁺.

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Petrache C M,Brant S,Barracco D et al. Nucl. Phys., 1996,A611:2472 Bogdanov P D,Demyanov A V,Kamauthe V A et al. Nucl. Phys.,1977,A275:229 3 Firestone R B,Gilat J,Nitschke J M et al. Phys. Rev., 1991,C43: 1066 4 Gizon A, Genevery J, Cata–Danil Gh et al. Z. Physics., 1997, A358: 3695 Audi G,Wapstra A H. Nucl. Phys., 1993,A565: 16 Sergeekov Yu V,Khazov Yu L,Burrows T W et al. Nuclear Date Sheets, 1994,72:6047 Tendow Y. Nuclear Data Sheets, 1996,77:7528 Rsel F, Fries H M,Alder K et al. At Data Nucl. Data Tables, 1978,21:919 Raman S,Gove N B. Phys. Rev.,1973,C7: 1995 10 Paul E S,Ahn K,Fossan D B et al. Phys. Rev., 1989,C39: 15311 Mller P, Nix J R,Kartz K–L et al. Atomic Data and Nuclear Data Tables, 1997, 66: 131; Firestone R B. In Table ofIsotope, 8th ed., Vol. II, edited by Shirley V S et al., New York, Wiley–Interscience, 1996, Appendices H,p–H7

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YU Yong, XIE Yuan-Xiang, XU Shu-Wei, LI Zhan-Kui, PAN Qiang-Yan, WANG Chun-Fang, XING Jian-Ping and ZHANG Tian-Mei. (EC/β ⁺) Decay of ¹³⁰Nd and ¹⁴⁰Tb[J]. Chinese Physics C, 2001, 25(2): 108-114.

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Received: 2000-01-26
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

(EC/β⁺) Decay of¹³⁰Nd and¹⁴⁰Tb

Corresponding author:YU Yong,

Institute of Modern Physics, The Chinese Academy of Sciences, Lanzhou 730000, China

Received Date:2000-01-26
Accepted Date:1900-01-01
Available Online:2001-02-05

Abstract:Isotopes,¹³⁰Nd and¹⁴⁰Tb were produced using enriched targets⁹⁶Ru and¹⁰⁶Cd, respectively,bombarded by³⁶Ar ion beam. The two nuclides were identified and studied by a He-jet tape transport system in combination with "X-γ" and "γ-γ" coincidence measure- ments. The half-life of¹³⁰Nd was determined to be (13±2)s. The EC/β⁺decay scheme of 130Nd was proposed for the first time, and the spins and parties of the ground-state and observed low-lying states in the daughter nucleus¹³⁰Pr were speculated tentatively. The previous simple EC/β⁺decay scheme of¹⁴⁰Tb was revised, and the spin-parity of its groundstate was assigned to be 7⁺.