TY - JOUR
T1 - Thermal stability of ESR signals in hydrothermal barites
AU - Sato, Fumihiro
AU - Toyoda, Shin
AU - Banerjee, Debabrata
AU - Ishibashi, Jun Ichiro
N1 - Funding Information:
This work has been supported by a Grant-in-Aid for Scientific Research on Innovative Areas ‘‘TAIGA’’ of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan and by the Inter-University Program for the Common Use of the Japan Atomic Energy Research Institute (JAERI) Facilities, Japan.
PY - 2011/9
Y1 - 2011/9
N2 - Thermal stability of the ESR signals from barites in chimneys deposited from hydrothermal vents is investigated using isothermal and isochronal annealing experiments. A combination of first and second order kinetics is required to explain the results. The Arrhenius plots of the decay rate constants give the activation energies of 1.0-1.3 eV. From the estimated decay rate constants at the sea bottom (3 °C), the decay rate of the signal was calculated to be less than 2% for the period of 20 ka, suggesting the applicability of the ESR method for dating barites up to about twenty thousand years.
AB - Thermal stability of the ESR signals from barites in chimneys deposited from hydrothermal vents is investigated using isothermal and isochronal annealing experiments. A combination of first and second order kinetics is required to explain the results. The Arrhenius plots of the decay rate constants give the activation energies of 1.0-1.3 eV. From the estimated decay rate constants at the sea bottom (3 °C), the decay rate of the signal was calculated to be less than 2% for the period of 20 ka, suggesting the applicability of the ESR method for dating barites up to about twenty thousand years.
UR - http://www.scopus.com/inward/record.url?scp=80052928356&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80052928356&partnerID=8YFLogxK
U2 - 10.1016/j.radmeas.2011.05.007
DO - 10.1016/j.radmeas.2011.05.007
M3 - Article
AN - SCOPUS:80052928356
SN - 1350-4487
VL - 46
SP - 866
EP - 870
JO - Radiation Measurements
JF - Radiation Measurements
IS - 9
ER -