In this paper,based on the one-dimensional（1D） optical superlattice model,we calculate the average reflectivities（ARs） of leaded ancient pottery（AP） made within the last 2000 years,and find that for incident lig...In this paper,based on the one-dimensional（1D） optical superlattice model,we calculate the average reflectivities（ARs） of leaded ancient pottery（AP） made within the last 2000 years,and find that for incident light with a suitable wavelength,the AR of the leaded AP increases monotonously with the increase in the layer number of the silvery glaze（SG） media.Based on this property,we propose an optical nondestructive method for identifying the age of leaded AP by detecting the AR.By using the exhaust algorithm and the discriminant function of variance,we obtain the optimal wavelength range of the incident light to identify the ages of the leaded AP.It is found that in the visible light band,if we choose green light with a wavelength range of 540-540.1 nm as the incident light,leaded AP made within the last 2000 years can be identified swiftly and precisely by detecting the ARs.This will be useful for designing optical instruments for the fast nondestructive identification of the ages of leaded AP.展开更多
A rapid and effective TL technique to authenticate ancient Chinese pottery is proposed in the paper. Twenty three samples, ranging in age from 200 to 9000 a,including multiple styles and shapes and drawn from diverse ...A rapid and effective TL technique to authenticate ancient Chinese pottery is proposed in the paper. Twenty three samples, ranging in age from 200 to 9000 a,including multiple styles and shapes and drawn from diverse and remote areas in China have been used to establish the typical annual dose as 5.5mGy/a and its associated deviation. Ten unauthenticated samples are then appraised using the technique which,in nearly all cases, leads to satisfactory results.展开更多
Generally, the walls of ceramic ware are thin and the sample to be used for TL dating has to be collected from 1￣2mm under the surface.This call introduce significant error into the dating method.Therefore,the result...Generally, the walls of ceramic ware are thin and the sample to be used for TL dating has to be collected from 1￣2mm under the surface.This call introduce significant error into the dating method.Therefore,the results of a series of simulated experiments are reported on the build-up effect of the internal β dose response in different thicknesses of pottery fragments (involving tile and brick).Correction factors,corresponding to different thicknesses,and correction 'depths' are proposed in terms of the experimental findings which may be incorporatd into the dating methods.展开更多
Bleaching experiments on Chinese pottery fine grains were conducted under sunlight and laboratory light conditions. It is found that the thermoluminescence (TL) at high temperatures can be bleached significantly, but ...Bleaching experiments on Chinese pottery fine grains were conducted under sunlight and laboratory light conditions. It is found that the thermoluminescence (TL) at high temperatures can be bleached significantly, but no effects were observed on TL signals used for the pre-dose dating technique. It is concluded that the pre-dose dating technique can be applied to samples even after light exposures. Pottery samples of Tang Dynasty and New Stone Age were studied. Modifications to routine pre-dose dating technique are proposed with adding preheat procedures and using saturation exponential fitting for the sensitivity change data. The modified technique can extend the dating range to New Stone Age.展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No. 10974061)
文摘In this paper,based on the one-dimensional（1D） optical superlattice model,we calculate the average reflectivities（ARs） of leaded ancient pottery（AP） made within the last 2000 years,and find that for incident light with a suitable wavelength,the AR of the leaded AP increases monotonously with the increase in the layer number of the silvery glaze（SG） media.Based on this property,we propose an optical nondestructive method for identifying the age of leaded AP by detecting the AR.By using the exhaust algorithm and the discriminant function of variance,we obtain the optimal wavelength range of the incident light to identify the ages of the leaded AP.It is found that in the visible light band,if we choose green light with a wavelength range of 540-540.1 nm as the incident light,leaded AP made within the last 2000 years can be identified swiftly and precisely by detecting the ARs.This will be useful for designing optical instruments for the fast nondestructive identification of the ages of leaded AP.
文摘A rapid and effective TL technique to authenticate ancient Chinese pottery is proposed in the paper. Twenty three samples, ranging in age from 200 to 9000 a,including multiple styles and shapes and drawn from diverse and remote areas in China have been used to establish the typical annual dose as 5.5mGy/a and its associated deviation. Ten unauthenticated samples are then appraised using the technique which,in nearly all cases, leads to satisfactory results.
文摘Generally, the walls of ceramic ware are thin and the sample to be used for TL dating has to be collected from 1￣2mm under the surface.This call introduce significant error into the dating method.Therefore,the results of a series of simulated experiments are reported on the build-up effect of the internal β dose response in different thicknesses of pottery fragments (involving tile and brick).Correction factors,corresponding to different thicknesses,and correction 'depths' are proposed in terms of the experimental findings which may be incorporatd into the dating methods.
基金a grant to the first author from the Research Grant Council of the Hong Kong Special Administrative Region, China (Grant No. 7105/97P).
文摘Bleaching experiments on Chinese pottery fine grains were conducted under sunlight and laboratory light conditions. It is found that the thermoluminescence (TL) at high temperatures can be bleached significantly, but no effects were observed on TL signals used for the pre-dose dating technique. It is concluded that the pre-dose dating technique can be applied to samples even after light exposures. Pottery samples of Tang Dynasty and New Stone Age were studied. Modifications to routine pre-dose dating technique are proposed with adding preheat procedures and using saturation exponential fitting for the sensitivity change data. The modified technique can extend the dating range to New Stone Age.
