Change of the energy loss of relativistic heavy ions in a gadolinium target at and above the ferromagnetic Curie temperature
✍ Scribed by F. Nickel; K.-H. Behr; L. Chulkov; H. Geissel; J. Klemm; O. Klepper; D. Marx; G. Münzenberg; E. Pfeng; J. Ružička; C. Scheidenberger; H. Weick
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 212 KB
- Volume
- 243
- Category
- Article
- ISSN
- 0168-583X
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✦ Synopsis
The energy loss dE of 250 A MeV ($52 GeV) bismuth ions in a 1 g/cm 2 poly-crystalline gadolinium target was measured with the high-resolving magnetic spectrometer FRS at GSI as a function of the target temperature T at and above the Curie temperature T C of about 19 °C.
After subtraction of effects due to thermal expansion of the target and due to a small asymmetric change of the charge state distribution, the relative energy-loss change (dE/dE) corr increases between 5 °C and 98 °C from 0 to 1.1(5) • 10 À3 . Between 13 °C and 15 °C a sharp increase by 0.26(3) • 10 À3 is observed.