Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific

LIU Guang-shan; HUANG Yi-pu; CAI Yi-hua; CHEN Min

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LIU Guang-shan, HUANG Yi-pu, CAI Yi-hua, CHEN Min. Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific[J]. Haiyang Xuebao, 2001, 23(4): 48-58.

Citation:

LIU Guang-shan, HUANG Yi-pu, CAI Yi-hua, CHEN Min. Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific[J]. Haiyang Xuebao, 2001, 23(4): 48-58.

LIU Guang-shan, HUANG Yi-pu, CAI Yi-hua, CHEN Min. Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific[J]. Haiyang Xuebao, 2001, 23(4): 48-58.

Citation:

LIU Guang-shan, HUANG Yi-pu, CAI Yi-hua, CHEN Min. Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific[J]. Haiyang Xuebao, 2001, 23(4): 48-58.

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Non-destructive γ spectrum analysis of polymetallic nodules from the eastern Pacific

Department of Oceanography, Institute of Subtropical Oceanography, Xiamen University, Xiamen 361005, China

Received Date: 2000-07-03
Rev Recd Date: 2000-10-16

Abstract

Abstract

Non-destructive γ spectrum analyses of 20 polymetallic nodules from the eastern Pacific are carried out.Numerous nuclides, such as ²³⁸U,²³⁰Th,²²⁶Ra,²¹⁰Pb,²²⁸Ra,²²⁸Th,²³⁵U,²²⁷Ac(or ²³¹Pa) and ⁴⁰K are detected.The count rates of the nuclide when top or bottom side of nodules facing detector are measured and the ratio R of the count rates of nuclides in the top and the bottom sides are obtained.From counts and ratios, some useful information relating to the growth and movement of the nodules, the source of nuclide and relationship between those and environment can be gotten.A new method for clear distinction between the top and bottom sides of the nodule based on the R value of ²²⁶Ra or ²¹⁰Pb is developed.In addition, one can infer the turnover of nodules according to the Rvalue of ²³⁰Th.
- the eastern Pacific,
- polymetallic nodule,
- radionuclide,
- γ-spectrometry

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References(13)

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