scholarly journals Electron spin resonance (ESR) signal intensity of quartz E1' centre and its potential use in fluvial sediments provenance tracing

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Chuan-Yi Wei ◽  
Chun-Ru Liu ◽  
Gong-Ming Yin ◽  
Wen-Peng Li
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Signal Intensity ◽  
Source Rocks ◽  
Sediment Provenance ◽  
Fluvial Sediments ◽  
Maximum Heat ◽  
Fluvial Sediment ◽  
Heat Treated ◽  
Spin Resonance

Abstract To assess if the heat-treated E 1' centre in quartz is suitable for fluvial sediment provenance tracing, eight granitic samples from sediments and their source rocks with distinct geological ages and origins were collected for electron spin resonance (ESR) measurements. The results show that the maximum heat-treated E 1' signal intensity of quartz in the fluvial sediments occurs upon heating at about 300°C, as previously observed in aeolian quartz. The heat-treated E 1' signal intensity of quartz in sediment samples also shows significant correspondence to those of their source rocks as well as their formation age. We propose that the heat-treated E 1' centre of sedimentary quartz, combined with other lithological discrimination parameters, could serve as an effective indicator for fluvial sediment provenance tracing.

scholarly journals Characteristics of ESR signals and TLCLs of quartz included in various source rocks and sediments in Japan: A clue to sediment provenance

2013 ◽  
Vol 40 (4) ◽  
pp. 334-340 ◽  
Author(s):  
Aiko Shimada ◽  
Masashi Takada ◽  
Shin Toyoda
Keyword(s):  
Grain Size ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Noise Level ◽  
Signal Intensity ◽  
Source Rocks ◽  
Sediment Provenance ◽  
Spin Resonance ◽  
Signal Intensities

AbstractThe variation of electron spin resonance (ESR) signal intensities and thermoluminescence colour images (TLCIs) of quartz was investigated in the present study for various rocks and sediments in Japan, to discuss the possibilities of identifying the sediment provenance. The ESR signal intensity of the E1’ centre in the same grain size in granitic quartz varies from sample to sample, except for that in Quaternary samples of volcanic sediment, which is very low, close to the noise level. It was found that the diagram, ESR intensities of Al versus Ti-Li centre signal intensities, distinguish volcanic from the same grain size in granitic quartz as well as distinguish individual tephra from another. The TLCIs from volcanic quartz and some granitic quartz samples is almost red and that from the rest of granitic and metamudstone quartz is blue as results of TLCIs although the emission intensities are different. Our results suggest that examining the multiple-centre signal intensities of ESR and the TLCIs are effective to identify the source of quartz and to estimate the sediment provenance.

scholarly journals ESR and Radiocarbon Dating of Gut Strings from Early Plucked Instruments

2020 ◽  
Vol 3 (1) ◽  
pp. 13 ◽  
Author(s):  
Sumiko Tsukamoto ◽  
Taro Takeuchi ◽  
Atsushi Tani ◽  
Yosuke Miyairi ◽  
Yusuke Yokoyama
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Signal Intensity ◽  
Radiocarbon Dating ◽  
Oxidized Iron ◽  
Spin Resonance ◽  
First Time ◽  
Great Revival

Early European plucked instruments have recently experienced a great revival, but a few aspects remain unknown (e.g., the gauge of gut strings). Here we report, for the first time, that the electron spin resonance (ESR) signal intensity of oxidized iron, Fe(III), from gut strings at g = 2 increases linearly with age within a few hundred years. The signal increase in the remaining old strings on early instruments can be used to judge if they are as old as or younger than the instrument. Obtaining the authenticity information of gut strings contributes to the revival of the old instruments and the music.

scholarly journals Effect of Pressure on Graphitization of Carbon. V. Electron Spin Resonance in Hard Carbon Heat-Treated under High Pressure

1968 ◽  
Vol 41 (11) ◽  
pp. 2782-2785 ◽  
Author(s):  
Kan-ichi Kamiya ◽  
Shigemi Yugo ◽  
Michio Inagaki ◽  
Hajime Saito ◽  
Takuro Tsuzuku
Keyword(s):  
High Pressure ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Hard Carbon ◽  
Effect Of Pressure ◽  
Heat Treated ◽  
Spin Resonance

scholarly journals Dose response of the E1’ centre in quartz

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shin Toyoda ◽  
Mana Amimoto
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Dose Response ◽  
Signal Intensity ◽  
Oxygen Vacancies ◽  
Gamma Ray ◽  
Natural Quartz ◽  
Spin Resonance ◽  
Gamma Ray Irradiation

Abstract The E1’ centre is one of the most common paramagnetic defects observed by electron spin resonance (ESR) in natural quartz, the formation of which is, however, quite complicated. The dose response to gamma ray irradiation of the E1’ centre in natural quartz was systematically investigated in the present study to find that its dose response depends on the heating conditions of the sample before irradiation. The signal intensity decreases on irradiation when quartz has been heated up to 300°C, while it increases when heated above 400°C. The phenomena can be explained by the electronic processes that heating supplies electronic holes to the oxygen vacancies while gamma ray irradiation supplies electrons.

Electron spin resonance of heat treated coals

Carbon ◽  
1966 ◽  
Vol 3 (4) ◽  
pp. 527-531 ◽  
Author(s):  
S Toyoda ◽  
H Honda
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Heat Treated ◽  
Spin Resonance
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