Multifractal detrended fluctuation analysis of soil radon (222Rn) and thoron (220Rn) time series
Journal Article
·
· Journal of Radioanalytical and Nuclear Chemistry
- Univ. of Azad Jammu and Kashmir Muzaffarbad, Azad Kashmir (Pakistan); University of Michigan
- Univ. of Azad Jammu and Kashmir Muzaffarbad, Azad Kashmir (Pakistan)
- Univ. of Michigan, Ann Arbor, MI (United States)
- Oncology and Radiotherapy Institute, Islamabad (Pakistan)
In this paper, we present results of Multifractal Detrended Fluctuation Analysis (MF-DFA) of soil Radon (222Rn) and Thoron (220Rn) time series to examine the scaling and multifractal features. Data consists of 15,692 measurements taken each over forty-minute interval. RTM 1688-2, 222Rn/220Rn electronic device has been used for measurement purposes. Seasonal periodicities have been removed from the data and MF-DFA was employed on de-seasonalized data. Original 222Rn and 220Rn time series have been converted into surrogate and shuffled time series. MFDFA has also been applied to the surrogate and shuffled series to examine the multifractality nature. Results of the study show that $$^{222}_{Orig}Rn$$, $$^{222}_{Surr}Rn$$ and $$^{220}_{Orig}Rn$$, $$^{220}_{Surr}Rn$$ time series are longrange positively correlated and an increase or decrease in either of radionuclide concentrations will be followed by another increase or decrease of concentrations in future measurements. The $$^{220}_{Shuff}Rn$$ time series has an independent or short-range dependent structure called white noise and the shuffled time series exhibit a very weak multifractality.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- Higher Education Commission (HEC) of Pakistan; USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0003920
- OSTI ID:
- 1783604
- Alternate ID(s):
- OSTI ID: 23004201
- Journal Information:
- Journal of Radioanalytical and Nuclear Chemistry, Journal Name: Journal of Radioanalytical and Nuclear Chemistry Journal Issue: 1 Vol. 328; ISSN 0236-5731
- Publisher:
- SpringerCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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