Chinese Physics C > 1997, Vol. 21 > Issue(9): 783-786

Decay Scheme of²²⁹Ra

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

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Abstract：
The ²²⁹Ra has been produced in the ²³²Th(n,a) ²²⁹Ra reaction by 14MeV neutron irradiation of natural Thorium. The ²²⁹Ra activities were separated from irradiated target material by radiochemical separation technique. 18 new γ rays with energies 14.5,15.6,18.8,21.8,22.5,44.0,47.5,55.0,63.0,69.6,93.6,94.1,98.5,102.2,104.5,106.1,161.171.5keV attributed to the ²²⁹Ac were observed for the first time by usin γ(X) spectroscopic methods. A partial decay scheme of ²²⁹Ra was proposed.

References

[1]	H. L. Ravn et al., J. Inorg.Nucl.Chem.,37(1975)383.[2]L. Westgaard et al.,Z. Phys.,A275(1975)127.[3]R. C. Thompson et al.,Phys.Rev.,C15(1977)2019.[4]G. A. Leander et al.,Phys.Rev.,C37(1988)2744.

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Shen Shuifa, Yuan Shuanggui, Yang Weifan, Fang Keming, Mou Wantong, Zhang Zueqian, Li Zongwei, Zhong Jiquan, Guo Tianrui and Chen Zhantu. Decay Scheme of ²²⁹Ra[J]. Chinese Physics C, 1997, 21(9): 783-786.

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Received: 1900-01-01
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

Decay Scheme of²²⁹Ra

Corresponding author:Shen Shuifa,

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

Received Date:1900-01-01
Accepted Date:1900-01-01
Available Online:1997-09-05

Abstract:The²²⁹Ra has been produced in the²³²Th(n,a)²²⁹Ra reaction by 14MeV neutron irradiation of natural Thorium. The²²⁹Ra activities were separated from irradiated target material by radiochemical separation technique. 18 new γ rays with energies 14.5,15.6,18.8,21.8,22.5,44.0,47.5,55.0,63.0,69.6,93.6,94.1,98.5,102.2,104.5,106.1,161.171.5keV attributed to the²²⁹Ac were observed for the first time by usin γ(X) spectroscopic methods. A partial decay scheme of²²⁹Ra was proposed.