CCZO -- Soil Geochemistry -- Mössbauer spectroscopy -- Calhoun CZO -- (2015-2015)

Authors:

Aaron Thompson Daniel deB. Richter Jared Wilmoth Diego Barcellos

Owners:

CZO Calhoun CZO National

Type:

Resource

Storage:

The size of this resource is 91 bytes

Created:

Nov 19, 2019 at 6:21 a.m.

Last updated:

Dec 23, 2019 at 11:56 p.m.

Citation:

See how to cite this resource

Content types:

Single File Content

Sharing Status:	Public
Views:	2067
Downloads:	29
+1 Votes:	Be the first one to this.
Comments:	No comments (yet)

Abstract

Soil samples analyzed via Mössbauer spectroscopy at three temperatures (295K, 77K and 4.2K). In each case the sample is loaded into the machine without prior modification (no grinding) to an ideal thickness based on the amount of iron in the sample. Transmission 57Fe Mössbauer spectroscopy was performed with a variable temperature He-cooled system with a 1024 channel detector. A 57Co source (~50 mCi) embedded in a Rh matrix was used at room temperature. Samples were mounted between two pieces of 0.127 mm thickness Kapton tape. In some cases, this was done inside an anoxic glovebox, and transferred immediately to the spectrometer cryostat to avoid sample oxidation prior to analysis. In other cases dried samples were used. The velocity (i.e., gamma-ray energy) was calibrated using α-Fe foil at 298 K. The transducer was operated in constant acceleration mode and folding was performed against the calibrated Fe foil to achieve a flat background. The raw sample files here are folded spectra using the most recent collected calibration standard. Data collection times are typically 24 h per sample per temperature, however can be longer/shorter in samples with less/more iron concentration.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:

WGS 84 EPSG:4326

Coordinate Units:

Decimal degrees

Place/Area Name:

Calhoun Long-Term Soil-Ecosystem Plots and Reference Areas, Calhoun CZO

Longitude

-81.7221°

Latitude

34.6080°

Temporal

Start Date:	05/01/2015
End Date:	12/31/2015

Streets Terrain Satelite

Spatial Extent

Content

This resource contains links to external content. Linked content is NOT stored in HydroShare, and we can't guarantee its availability, quality, or security.

Learn more about the BagIt download

Select a file to see file type metadata.

Additional Metadata

Name	Value
czos	Calhoun
czo_id	4678
comments	Soil samples of enriched and depleted iron horizons were collected previously by Dan Richter and passed to Aaron Thompson in 2015. Each sample was previously air-dried. Dried samples were loaded into the Mössbauer spec. at the University of Georgia, located in Barrow Hall on the main Athens campus and each sample was analyzed for ~24h at three temperatures (295K, 77K and 4.2K). Samples from the upper two horizons did not have sufficient iron to collect quality spectrum.
keywords	Iron, soil, Calhoun
subtitle	Soil depth: Enriched Fe horizon
variables	Velocity (mm/s), intensity (counts)
disciplines	Biogeochemistry, Soil Science / Pedology

Related Resources

This resource is referenced by	Thompson A, Barcellos D, Wilmoth J, & Richter D (2015). Depth Variation of Soil Iron Crystallinity at the Calhoun Critical Zone Observatory. Goldschmidt Conference, Prague, CZ
This resource is referenced by	Thompson, A., Barcellos, D., Wilmoth, J., and Richter, D. (2015). Depth Variation of Soil Iron Crystallinity at the Calhoun Critical Zone Observatory. Calhoun CZO 2015 Summer Science Meeting

How to Cite

Thompson, A., D. d. Richter, J. Wilmoth, D. Barcellos (2019). CCZO -- Soil Geochemistry -- Mössbauer spectroscopy -- Calhoun CZO -- (2015-2015), HydroShare, http://www.hydroshare.org/resource/cd92a0c4f9d64c748f21cd8f077cd072

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/

Comments

There are currently no comments

	Name:
	Organization:
	Email:
	Address:
	Phone:
	Homepage:
	Author Identifiers: