Note change in Version 2:
This form now serves as the entry form for single or multiple samples. However, the result pages
differ: entering only a single sample yields additional plots showing i) production rate changes
predicted by the time-dependent scaling schemes, and ii) a comparison of ages generated by the various
Is your browser timing out before receiving the results?
It takes a few seconds to
calculate each exposure age. If the timeout setting on your browser is too short, it will stop
waiting for the page before the calculations are done. You can set the wait time to a longer
value on some browsers. If that's not true of yours (Safari, for example), you
will have to submit fewer samples at once.
This form is designed to have text pasted into it from a text
editor or an Excel spreadsheet. The formatting requirements are somewhat
finicky, but easy to use once you have a spreadsheet set up appropriately.
An example spreadsheet is here.
The rules are as follows:
In most cases, pasting directly from an Excel spreadsheet
should satisfy the rules. An example of an acceptable input text block
The thirteen elements are as follows:
- Enter plain ASCII text only.
- Each sample should occupy its own line.
- Each line should
have thirteen elements, as described below.
should be separated from each other by white space (spaces or
- Something other than white space must be entered for each
element. For example, if you have no Al measurements for a sample, you
must enter "0" in the Al concentration and Al uncertainty positions.
Note: Nuclide concentrations should already take account of carrier and process blanks. Also,
all measurements should be normalized to the Nishiizumi Al-26 and Be-10 standards
(fully referenced in the documentation).
For measurements made at LLNL, this is true already; it may require adjusting measurements made at other
AMS labs. PRIME Lab users in particular should take note of this.. There is additional
discussion of these issues in the documentation.
Here is an example of an acceptable input text block. You can paste this in above to try a sample
- Sample name. Any text string not exceeding 24 characters.
Sample names may not contain white space or any characters that
could be interpreted as delimiters or escape characters, e.g.,
slashes of both directions, commas, quotes, colons, etc. Stick to letters, numbers, and dashes.
- Latitude. Decimal degrees. North latitudes are positive. South latitudes are negative.
- Longitude. Decimal degrees. East longitudes are positive. West longitudes are negative.
- Elevation/pressure. Meters or hPa, respectively, depending
on selection below.
- Elevation/pressure flag. Specifies how to treat the
elevation/pressure value. This is a three-letter text string. If you have
supplied elevations in meters and the
standard atmosphere is applicable at your site (locations
outside Antarctica), enter "std" here. If you have supplied elevations in
meters and your site is in Antarctica, enter "ant" here. If you have entered
pressure in hPa, enter "pre" here. Any text other than these three options
will be rejected.
- Sample thickness. Centimeters.
- Sample density. g cm-3.
- Shielding correction. Samples with no topographic shielding, enter 1.
For shielded sites, enter a number between 0 and 1.
- Erosion rate inferred from independent evidence. cm
- 10Be concentration. Atoms g-1. Standard or scientific
- Uncertainty in 10Be concentration. Atoms g-1. Standard or scientific
- 26Al concentration. Atoms g-1. Standard or scientific
- Uncertainty in 26Al concentration. Atoms g-1. Standard or scientific
PH-1 41.3567 -70.7348 91 std 4.5 2.7 1 8e-5 123500 3700 712400 31200
01-MBL-059-BBD -77.073 -145.686 712 ant 4.75 2.65 0.997 0 353000 8000 1940000 49000
NH-1 57.968 -6.812 790 std 3 2.65 1 0 943000 28000 0 0
Here is an Excel spreadsheet containing example data that you can paste
in above to try a sample calculation.