In Situ Ion Implantation for Quantitative SIMS Analysis

1985 ◽  
Vol 48 ◽  
Author(s):  
Richard T. Lareau ◽  
Peter Williams
Keyword(s):  
Ion Implantation ◽  
Mass Spectrometer ◽  
Reference Level ◽  
Sims Analysis ◽  
Secondary Ion ◽  
Quantitative Sims ◽  
Better Than ◽  
Oxygen Concentrations

ABSTRACTThe primary ion column of a secondary ion mass spectrometer (Cameca IMS 3f) has been used as an ion implanter to prepare calibrated standards, In situ for quantitative SIMS analysis, with an accuracy better than 10%. The technique has been used to determine oxygen concentrations in contaminated TiSi2 films by implanting a reference level of 18O into a portion of the film.

scholarly journals Mechanisms of lipid preservation in archaeological clay ceramics revealed by mass spectrometry imaging

2020 ◽  
Vol 117 (26) ◽  
pp. 14688-14693
Author(s):  
Simon Hammann ◽  
David J. Scurr ◽  
Morgan R. Alexander ◽  
Lucy J. E. Cramp
Keyword(s):  
Mass Spectrometry ◽  
Cross Sections ◽  
Secondary Ion Mass Spectrometry ◽  
Ceramic Vessels ◽  
Sims Analysis ◽  
Clay Ceramics ◽  
Available Information ◽  
Secondary Ion ◽  
Inorganic Matrix

Traces of lipids, absorbed and preserved for millennia within the inorganic matrix of ceramic vessels, act as molecular fossils and provide manifold information about past people’s subsistence, diet, and rituals. It is widely assumed that lipids become preserved after adsorption into nano- to micrometer-sized pores, but to this day the distribution of these lipids in the ceramics was virtually unknown, which severely limits our understanding about the process of lipid preservation. Here we use secondary ion mass spectrometry (SIMS) imaging for directin situanalysis of lipids absorbed in 700- to 2,000-y-old archaeological pottery. After sectioning from larger sherds, wall cross-sections of smaller fragments were used for SIMS analysis. Lipids were found in relatively large zones of 5- to 400-µm diameter, which does not support the notion of absorption only into individual nanometer-scale pores but indicates that more macroscopic structures in the ceramics are involved in lipid preservation as well. Furthermore, lipids were found concentrated on calcium carbonate inclusions in the ceramics, which suggests that precipitation of fatty acids as calcium salts is an important aspect of lipid preservation in archaeological samples. This has important implications for analytical methods based on extraction of lipids from archaeological ceramics and needs to be considered to maximize the yield and available information from each unique sample.

Quantitative SIMS analysis of nitrogen using in situ internal implantation

1999 ◽  
Vol 147 (1-4) ◽  
pp. 14-18 ◽  
Author(s):  
S Seki ◽  
H Tamura ◽  
H Sumiya
Keyword(s):  
Sims Analysis ◽  
Quantitative Sims

Corrosion of Waste Glasses in Boom Clay: Studies of Element Concentrations by Sims

1995 ◽  
Vol 412 ◽  
Author(s):  
A. Lodding ◽  
P. Van Iseghem
Keyword(s):  
Composition Dependence ◽  
Secondary Phase ◽  
Boom Clay ◽  
Glass Corrosion ◽  
Secondary Phase Formation ◽  
Sims Analysis ◽  
Corrosion Mechanisms ◽  
Coherent Picture ◽  
Secondary Ion

AbstractIn-situ corrosion tests on nuclear waste glasses in Boom clay provided direct contact glass-clay at 90°C, for periods of 2, 3.5 and 7.5 years. The corroded reference glasses (two R7T7 type glasses, four Pamela type glasses), were studied in terms of SIMS (secondary ion mass spectroscopy) and mass losses.The Al2O3 rich Pamela glasses appear to corrode in a selective-substitutional way, the other glasses dissolve almost congruently. Differences in the corrosion extent between the glasses are associated with compositional differences and secondary phase formation. SIMS analysis provides the reaction layer thickness and the relative element behaviour in this layer. Although relatively few, the data have provided a coherent picture of glass corrosion, in terms of corrosion mechanisms, time and glass composition dependence.

UV-light microscope: improvements in optical imaging for a secondary ion mass spectrometer

2015 ◽  
Vol 30 (5) ◽  
pp. 1207-1213 ◽  
Author(s):  
Noriko T. Kita ◽  
Peter E. Sobol ◽  
James R. Kern ◽  
Neal E. Lord ◽  
John W. Valley
Keyword(s):  
Ultraviolet Light ◽  
Mass Spectrometer ◽  
Light Microscope ◽  
Uv Light ◽  
Optical Resolution ◽  
Sample Surface ◽  
Light Illumination ◽  
Reflected Light ◽  
Secondary Ion

In situ analysis by secondary ion mass spectrometer (SIMS) and other in situ techniques requires accurate aiming of the sample surface at μm scale. Modification of the reflected-light microscope system of an IMS 1280 SIMS to use ultraviolet light illumination improved the optical resolution from 3.5 μm to 1.3 μm.

A High Angle, Double Tilting Cold Stage for the AEI EM7

1974 ◽  
Vol 32 ◽  
pp. 450-451
Author(s):  
P.R. Swann ◽  
A.E. Lloyd
Keyword(s):  
Habit Plane ◽  
Temperature Control ◽  
Tilt Angle ◽  
Cooling System ◽  
Thermal Drift ◽  
High Angle ◽  
Cold Stage ◽  
High Degree ◽  
Better Than

Figure 1 shows the design of a specimen stage used for the in situ observation of phase transformations in the temperature range between ambient and −160°C. The design has the following features a high degree of specimen stability during tilting linear tilt actuation about two orthogonal axes for accurate control of tilt angle read-out high angle tilt range for stereo work and habit plane determination simple, robust construction temperature control of better than ±0.5°C minimum thermal drift and transmission of vibration from the cooling system.

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