UNIVERSITY OF CALIFORNIA, BERKELEY
BERKELEY • DAVIS • IRVINE • LOS ANGELES • MERCED • RIVERSIDE • SAN DIEGO • SAN FRANCISCO

Tel: (510) 643-9361 (office), 643-1433 (lab)E-Mail: kuni@ssl.berkeley.edu
http://www.ssl.berkeley.edu/Chosmochem/

AMS standards

SANTA BARBARA • SANTA CRUZSPACE SCIENCES LABORATORY
7 Gauss Way
Berkeley, CA 94720-7450
FAX: (510) 643-7629
http://www.ssl.berkeley.edu/(rev. 12/19/2011)

Dear AMS Colleagues:
I have prepared a quantity of 10Be, 26Al, 36Cl, and 41Ca AMS standards [1-4]. These standards
have been evaluated by several AMS laboratories and are currently being used as primarystandards at many AMS labs such as the Lawrence Livermore National Laboratory (CAMS),Purdue University (PRIME), the University of Tokyo (MALT), and others.
In anticipation of an increased demand for AMS standards, we prepared sets of AMS standards
for AMS community. The price of each standard material, below, is only a nominal fee in orderto recover the labor and material cost for preparation and distribution of the standard.
A description of each standard set is given below with references [1-4].
Each bottle of solution should be sufficient to prepare a few hundred cathodes, giving at least
1,000 cathodes from the dilution set for any single nuclide. Each set of standards consists of 4 to
6 solutions with different isotopic ratios. This allows calibration for different purposes over awide range of isotopic ratios.
1. Price (including Federal Express shipping charge, excluding the customs):$3,400 (USD) per nuclide (in solution)
or$12,000 (USD) for 10Be after conversion to BeO.
$9,000 (USD) for 26Al or 41Ca after conversion to Al2O3, or CaF2.
$7,000 (USD) for 36Cl after conversion to AgCl.
2. Availability: One week after receipt of order for solution or one month after receipt of orderfor solid materials. Invoice will be dispatched on the date of delivery of the standardmaterials.
3. Full payment must be made to the Regents of the University of California within thirty (30)days of the date of invoice.
If you are interested in any standards, please send an e-mail to me at the address below. TheUniversity will contact with you with payment details. The Space Sciences Laboratory at theUniversity of California, Berkeley will accept either a purchase order from your institute or acheck (payable to Regents of the University of California).

Contact for order or question:
Dr. Kunihiko Nishiizumi
Space Sciences Laboratory
University of California, Berkeley
kuni@ssl.berkeley.edu
Contact for payment:
Ms. Ivy Lai, Financial Services Manager+1-510-642-2929 (phone), +1-510-643-7629 (fax)ivylai@ssl.berkeley.edu
The isotopic ratios are described in references [1-4] and labeled on each set of standards.
10Be: 6 standards. HCl solution. See reference [3]*.
10Be/Be: 2.71x10-11, 8.56x10-12, 6.32x10-12, 2.85x10-12, 9.72x10-13, and 5.35x10-13
150-270 mg Be/solution bottle* Note new calibration values and new half-life of 10Be (1.36x106 yr) [3]26

Al: 6 standards. HCl solution. See reference [2].
26
Al/Al (based on 26Al half-life of 7.05x105 yr):
7.44x10-11, 3.10x10-11, 1.07x10-11, 4.69x10-12, 1.82x10-12, and 4.99x10-13
260-900 mg Al/solution bottle36

Cl: 4 standards. H2O solution. See reference [4].
36
Cl/Cl (based on 36Cl half-life of 3.01x105 yr):
1.00x10-11, 5.00x10-12, 1.60x10-12, and 5.00x10-13~1300 mg Cl/solution bottle41

Ca: 6 standards. HNO3 solution. See reference [1].
41
Ca/Ca: 9.29x10-9, 1.16x10-10, 9.76x10-12, 5.14x10-12, 1.10x10-12, and 5.88x10-13~650 mg Ca/solution bottle

References:[1] K. Nishiizumi, M. W. Caffee, D. J. DePaolo, Preparation of 41Ca AMS standards, Nucl.
Instrum. Methods Phys. Res. B172 (2000) 399-403.
[2] K. Nishiizumi, Preparation of 26Al AMS Standards, Nucl. Instrum. Methods Phys. Res.
B223-224 (2003) 388-392.
[3] K. Nishiizumi, M. Imamura, M. W. Caffee, J. R. Southon, R. C. Finkel, J. McAninch,Absolute Calibration of 10Be AMS Standards, Nucl. Instrum. Methods Phys. Res. B258
(2007) 403-413.
[4] P. Sharma, P. W. Kubik, U. Fehn, H. E. Gove, K. Nishiizumi, D. Elmore, Development of36
Cl standards for AMS, Nucl. Instrum. Methods Phys. Res. B52 (1990) 410-415.