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APS » Journals » Phys. Rev. Lett. » Volume 93 » Issue 11
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Phys. Rev. Lett. 93, 112501 (2004) [4 pages]

Enhanced Electron-Capture Decay Rate of 7Be Encapsulated in C60 Cages

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T. Ohtsuki1, H. Yuki1, M. Muto1, J. Kasagi1, and K. Ohno2
1Laboratory of Nuclear Science, Tohoku University, 1-2-1 Mikamine, Taihaku, Sendai 982-0826, Japan
2Department of Physics, Yokohama National University,79-5 Tokiwadai, Hodogaya, Yokohama 240-8501, Japan

Received 18 February 2004; published 9 September 2004

The decay rate of 7Be electron capture was measured in C60 and Be metal with a reference method. The half-life of 7Be endohedral C60 (7Be@C60) and 7Be in Be metal (Be metal (7Be)) is found to be 52.68±0.05 and 53.12±0.05 days, respectively. This amounts to a 0.83% difference in electron-capture decay half-life between 7Be@C60 and Be metal (7Be). Our result is a reflection of the different electron wave functions for 7Be@C60 inside C60 compared to the situation when 7Be is in a Be metal.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.93.112501
DOI:
10.1103/PhysRevLett.93.112501
PACS:
21.10.Tg, 23.40.Hc, 27.20.+n, 36.40.Cg
 
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