Title: |
Positron trapping in deformed copper down to millikelvins |
Author(s): |
M. Haaks , C. Tramm, I. Müller , T. Staab , C. Zamponi , P. Herzog and K. Maier |
Journal: |
Mater. Sci. Forum |
Year: |
2004 |
Volume: |
445-6 |
Pages: |
96-98 |
DOI: |
10.4028/www.scientific.net/MSF.445-446.96 |
File URL: |
http://www.scientific.net/MSF.445-446.96 |
Abstract: |
We have performed a study of the temperature dependence of the S-parameter on slightly deformed (7%) copper over a temperature range from room temperature (300 K) down to 7 mK, using a (3)He/(4)He dilution refrigerator. The sample used is expected to contain a spectrum of lattice defects with both deep and shallow traps. The data show a decrease of the S-parameter with temperature down to about 1K and a slight increase below 800 mK. |