Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 21 September 1973:
Vol. 181. no. 4105, pp. 1164 - 1165
DOI: 10.1126/science.181.4105.1164
Prev | Table of Contents | Next

Articles

Pressure Dependence of the Radioactive Decay Constant of Beryllium-7

W. K. Hensley 1, W. A. Bassett 2, and J. R. Huizenga 3

1 Department of Chemistry, University of Rochester, Rochester, New York 14627
2 Department of Geological Sciences, University of Rochester
3 Department of Chemistry, University of Rochester

Diamond anvil presses of a new design were used to compress samples of beryllium-7 oxide to 120, 210, and 270 kilobars. The decay constant for the conversion of beryllium-7 to lithium-7 by electron capture was measured for compressed and uncompressed samples. A least-squares fit of the equation (lgrc-lgr)/lgr = KpP to the experimental data, where lgrC and lgr are the decay constants of the compressed sample and an uncompressed sample, respectively, and P is pressure, yields a value of (2.2 ± 0.1) x 10-5 kbar-1 for the constant Kp.

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)