
Utskrift från Malmö universitet - mau.se
Utskrift från Malmö universitet - mau.se
Publication | Article, peer reviewed scientific |
Title | Fundamental effects and non-linear Si detector response |
Author | Whitlow, Harry J ; Zhang, Yanwen |
Date | 2002 |
English abstract | |
Non-linearity in the energy response of a Si p-i-n charged particle detector has been studied for incident particles with Z1 between 3 and 26, and energies between 0.1 and 0.7 MeV per nucleon. Although the data closely followed a straight line relations, fitting of the data to a third order polynomial revealed that the response exhibited a persistent curvature that acted to reduce the energy interval spanned by a channel as the energy increased. The curvature increased as Z1 increased from 4 to 8 and then systematically decreased. The curvature is larger and has the opposite energy dependence to the stopping in a dead entrance window and the energy deposited in non-ionising processes within the active layer. The plasma recombination dependence on the average stopping along the plasma column may account for the reduction in curvature as Z1 increases from 9 to 25 but cannot explain the net effect. The low-energy increase in energy channel span, which has also been reported by others, might be associated with electron excitation in resonant and direct classical quasi-elastic collisions for low-energy ions, or less likely, electronic non-linearity's associated with Z1 and energy dependent time structure in the current pulse from the detector. Simple interpolation of the window-loss corrected polynomial coefficients is the best approach if the calibration for Z1 cannot be established directly. | |
DOI | https://doi.org/10.1016/S0168-583X(01)01302-7 (link to publisher's fulltext.) |
Host/Issue | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms;1-4 |
Volume | 190 |
ISSN | 0168-583X |
Pages | 375-378 |
Language | eng (iso) |
Subject | Si charged-particle detector P-i-n diode ERDA Time of flight Electronic stopping Energy calibration |
Handle | http://hdl.handle.net/2043/531 Permalink to this page |
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