Nuclear quadrupole moment of the 99Tc ground state.

L. A. ERRICO, G. DARRIBA, M. RENTERÍA, Z. TANG, H. EMMERICH Y S. COTTENIER.

PHYSICAL REVIEW B - CONDENSED MATTER AND MATERIALS PHYSICS

American Physical Society

Lugar: New York; Año: 2008 vol. 77 p. 195118 - 195118

0163-1829

<!-- /* Font Definitions */ @font-face {font-family:"MS Sans Serif"; panose-1:0 0 0 0 0 0 0 0 0 0; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:3 0 0 0 1 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0pc; margin-bottom:.0001pt; mso-pagination:none; font-size:10.0pt; font-family:"MS Sans Serif"; mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:"Times New Roman"; mso-ansi-language:ES-TRAD; layout-grid-mode:line;} @page Section1 {size:51.0pc 66.0pc; margin:6.0pc 7.5pc 6.0pc 7.5pc; mso-header-margin:3.0pc; mso-footer-margin:3.0pc; mso-paper-source:0;} div.Section1 {page:Section1;} --> El paper consta de 5 páginas. La referencia Physical Review B 77, 195118-1 a 195118-5, 2008. By combining first-principles calculations and existing nuclear magnetic resonance (NMR) experiments, we determine the quadrupole moment of the 9/2+ ground state of 99Tc to be (−)0.14(3)b. This confirms the value of −0.129(20)b, which is currently believed to be the most reliable experimental determination, and disagrees with two earlier experimental values. We supply ab initio calculated electric-field gradients for Tc in YTc2 and ZrTc2. If this calculated information would be combined with yet to be performed Tc-NMR experiments in these compounds, the error bar on the 99Tc ground state quadrupole moment could be further reduced.