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Science 13 July 1979:
Vol. 205. no. 4402, pp. 188 - 190
DOI: 10.1126/science.205.4402.188
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Articles

Superconducting Properties of Protactinium

J. L. SMITH 1, J. C. SPIRLET 2, and W. MÜLLER 2

1 Los Alamnos Scientific Laboratory, Los Alamos, News Mexico 87545
2 Commission of the European Communities, European Institute for Transuraniuin Elements, D-7500, Karlsruhe, Federal Republic of Germany

The superconducting transition temperature and upper critical magnetic field of protactinium were measured by alternating-current susceptibility techniques. Since the superconducting behavior of protactinium is affected by its 5f electron character, it is clear now that protactinium is a true actinide element.

Submitted on March 26, 1979

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