Sample Name: C7
IGSN: IESZH000X
Laboratory: Rio Grande do Sul
Analyst: Andrea R. Jelinek
Mineral: apatite
Dosimeter Glass: CN5
Dosimeter Glass U ppm: 12.5
Irradiation:
Count Date:
Locality: Cuevas Range
Rock Type: Granite
Rock Age:
Acquisition system: Axioplan Zeiss Microscope and the Autoscan System
Magnification: 1000
Radiation Facility: Orphèe reactor
Total Thermal Neutron Fluence:
Position in Irradiation Canister (#):
Area of Graticule Square:
No. of Crystals Counted: 30
Zeta Factor: 258.2
Zeta Factor Error (1s): 10.2
Rho d: 536700
Rho d (% Relative Error):
N d: 10730
Geometry factor (for EDM and Zeta ICPMS methods): 0.5
Etchant: 5.5 N nitric acid
Etching Conditions: 21°C 20 sec
Method - U: EDM
ICPMS Model:
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Chemistry Comment:
238U Decay Constant: 1.55125E-10
238U Decay Constant Error:
235U Decay Constant: 9.84850E-10
235U Decay Constant Error:
232Th Decay Constant : 4.94750E-11
232Th Decay Constant Error:
Spontaneous Fission Decay Constant: 8.46E-17
Spontaneous Fission Decay Constant Error:
238U/235U: 137.88
Fission Decay Constant Reference: Spadavecchia , A. & Hahn, B. (1967). Die Rotationskammer und einige Anwendungen. Helvetica Physica Acta, 40, p. 1063-1079
Decay Constant References: Steiger, R.H. and Jager, E., 1977, Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters, v. 36, no. 3, p. 359-362
Decay Constant Comment:

Sample ID: C7
Sample Description:
GeoObject Type: Other
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Material: Rock
Latitude: -26.968333333333
Longitude: -66.63416
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