Change of Be7 decay rate in exohedral and endohedral C60 fullerene compounds and its implications

A. Ray, P. Das, S. K. Saha, S. K. Das, J. J. Das, N. Madhavan, S. Nath, P. Sugathan, P. V. M. Rao, and A. Jhingan
Phys. Rev. C 73, 034323 – Published 29 March 2006

Abstract

The half-life of exohedral Be7-C60 complex and that of Be7 implanted in a gold foil have been found to be about the same within ≈0.2%. Using a radiochemical technique, we also measured that the probability of formation of endohedral Be7@C60 complex by nuclear implantation technique was (5.6 ± 0.45)%. We also find that the half-life of endohedral Be7@C60 complex is shorter than that of exohedral complex by more than 1%. An analysis of these results using linear muffin-tin orbital method calculations indicates that most of the implanted Be7 ions in fullerene C60 stay at a distance of 5.3Å from the centers of nearest C60 molecules forming exohedral compounds and those who enter the fullerene cages go to the centers of the cages forming endohedral Be7@C60 compounds.

  • Figure
  • Received 16 September 2005

DOI:https://doi.org/10.1103/PhysRevC.73.034323

©2006 American Physical Society

Authors & Affiliations

A. Ray1, P. Das1, S. K. Saha2, S. K. Das2, J. J. Das3, N. Madhavan3, S. Nath3, P. Sugathan3, P. V. M. Rao3,4, and A. Jhingan3

  • 1Variable Energy Cyclotron Centre, 1/AF, Bidhannagar, Kolkata 700064, India
  • 2Radiochemistry Division, Variable Energy Cyclotron Centre, 1/AF, Bidhannagar, Kolkata 700064, India
  • 3Nuclear Science Centre, New Delhi, India
  • 4Department of Nuclear Physics, Andhra University, Visakhapatnam 530003, India

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Issue

Vol. 73, Iss. 3 — March 2006

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