Beryllium-10 / Aluminium-26 exposure age calculator

For calculating an exposure age when erosion rate is known independently.

Single sample, long form. Version 1.1. March, 2006.

VERSION 1 IS NO LONGER THE CURRENT VERSION. PLEASE CHANGE YOUR BOOKMARKS ACCORDINGLY. FOR MORE DETAILS, SEE THE MAIN PAGE.

Written by Greg Balco, balcs@u.washington.edu

Other forms: Single sample, short form -- Multiple samples

This is the long form, which includes a lot of explanation about units, formats, and syntax. This means it doesn't fit conveniently on one page. If you want the short form, see the link above. This is also the single-sample entry form. If you want the multiple-sample one, it's here.
Use a test sample for demonstration purposes --
Site information Units
Sample name: Any string not exceeding 24 characters. Avoid spaces or any other characteres which could be interpreted as delimiters, e.g. backslashes, commas, or quotes. Example: 01-MBL-007-VVB
Latitude: Decimal degrees.
S latitude and W longitude are negative.
Example: 45.9846 or -103.5467
Longitude:
Elevation/pressure: Meters or hPa, depending on selection below.
Elevation values in m, use standard atmosphere
Elevation values in m, use Antarctic atmosphere
Site pressure values in hPa
 Why are there three atmosphere options?
Sample thickness: Centimeters.
Sample density: g cm-3.
Shielding correction: Samples with no topographic shielding, enter 1.
For shielded sites, enter a fraction less than 1.
Calculate shielding here.
Erosion rate: cm yr-1. The erosion rate of the surface inferred from independent evidence.
Nuclide concentrations Units

[10Be]

+/-

Atoms g-1. Standard or scientific notation.

Example: 415000 or 4.15e5.

If you have no data for one nuclide, enter zero or leave blank.

[26Al]

+/-

Reminders:

1. 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.

2. The measurements that you enter here should already take account of carrier and process blanks.

For more information on these issues, see the documentation.

This website is supported by the National Science Foundation via the CRONUS-Earth project