A SILICON PHOTODIODE ARRAY DETECTOR COVERING A LARGE SOLID ANGLE FOR FLUORESCENCE EXAFS MEASUREMENTS FROM 2 TO 25 keV
نویسندگان
چکیده
A Si-photodiode array detector operated in the photovoltaic mode is shown to offer several advantages over other fluorescence detectors: high efficiency, perfect linearity of the response, vacuum compatibility for soft X-ray measurements, absence of gas and voltage supplies. Low temperature cooling down to 120°c is needed in order to decrease the dark current and thermal noise of the shunt resistance.Typica1 spectra recorded on a dilute cytochrome c solution and on a liquid which is strongly absorbing in the soft X-ray range i.e. c2c14* are presented.
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