NDLI: Identification of paramagnetic centers and the dating of cave dripstones by electron paramagnetic resonance

Content Provider	Springer Nature Link
Author	Wencka, M. Krzyminiewski, R.
Copyright Year	2004
Abstract	Dating of samples of cave dripstones collected from the Jaskinia Czarna (the Polish Tatra Mountains) and fossil bones was carried out by means of electron paramagnetic resonance (EPR). By this method the age of the sample is found as the ratio of the total dose (TD) to the annual dose rate (D a). TD is established on the basis of EPR spectra, whileD a is the sum of the internal dose rate, calculated on the basis of the concentration and activity of radioactive nuclides in the sample, and the external dose rate measured at the site of the sample collection by a calibrated γ-radiation probe. Two models of uranium accumulation were used: the model of linear accumulation and the model on the basis of the assumption of a disturbed radiation equilibrium in the uranium series. The results were compared with the age determined by the uranium-thorium method. Moreover, by the computer resolution enhancement method the dynamics of paramagnetic centers in calcite annealed in nitrogen atmosphere was studied in the range of 283–873 K, and the results were compared with earlier results for calcite annealed in the air. On the basis of the study of paramagnetic center dynamics in dripstone calcite it was established that the radicals responsible for the EPR signals were CO 2 − in different symmetries of the crystalline field, CO 3 3− in the axial symmetry, CO 3 − in the axial and isotropic symmetry and HCO 3 2− . The results implied that samples to be subjected to EPR dating should be kept at room temperature.
Starting Page	561
Ending Page	578
Page Count	18
File Format	PDF
ISSN	09379347
Journal	Applied Magnetic Resonance
Volume Number	26
Issue Number	4
e-ISSN	16137507
Language	English
Publisher	Springer-Verlag
Publisher Date	2004-01-01
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solid State Physics Spectroscopy/Spectrometry Physical Chemistry Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Spin-labeled photosynthetic reaction centers fromRhodobacter sphaeroides studied by electron paramagnetic resonance spectroscopy and molecular dynamics simulations

Multifrequency electron paramagnetic resonance of ultramarine blue

Determination of differential quantum yields in solution by electron paramagnetic resonance spectroscopy

High-field and high-frequency electron paramagnetic resonance

Paramagnetic centers in tumor cells

Electron paramagnetic resonance studies of human liver tissues

High-field and high-frequency electron paramagnetic resonance instrumentation

Comparative analysis and identification of low-symmetry paramagnetic centers: Cr3+ in KTiOPO4

Electron paramagnetic resonance W-band spectrometer with a low-noise amplifier

Identification of paramagnetic centers and the dating of cave dripstones by electron paramagnetic resonance

Similar Documents

Spin-labeled photosynthetic reaction centers fromRhodobacter sphaeroides studied by electron paramagnetic resonance spectroscopy and molecular dynamics simulations

Multifrequency electron paramagnetic resonance of ultramarine blue

Determination of differential quantum yields in solution by electron paramagnetic resonance spectroscopy

High-field and high-frequency electron paramagnetic resonance

Paramagnetic centers in tumor cells

Electron paramagnetic resonance studies of human liver tissues

High-field and high-frequency electron paramagnetic resonance instrumentation

Comparative analysis and identification of low-symmetry paramagnetic centers: Cr3+ in KTiOPO4

Electron paramagnetic resonance W-band spectrometer with a low-noise amplifier

Identification of paramagnetic centers and the dating of cave dripstones by electron paramagnetic resonance