کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829937 | 1524500 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of the film microstructures on CVD diamond radiation detectors
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The polycrystalline nature of the films has limited the improvement of CVD diamond radiation detectors. In this work, three CVD diamond films with different microstructures were grown by a hot-filament chemical vapor deposition (HFCVD) technique and were fabricated as CVD diamond radiation detectors. The photocurrents and the pulse height distributions (PHDs) obtained by the detectors were measured by using 5.9Â keV 55Fe X-rays. The dark-current of 16.0Â nA and the photocurrent of 15.9Â nA are achieved at a bias voltage of 100Â V. The PHD peak is well separated from the noise and a better energy resolution of 21.2% is obtained due to the high ratio of grain size to the film thickness. The time-dependent photocurrent initially increases rapidly and then levels off due to the 'polarization' effect.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 277, Issues 1â4, 15 April 2005, Pages 382-387
Journal: Journal of Crystal Growth - Volume 277, Issues 1â4, 15 April 2005, Pages 382-387
نویسندگان
Minglong Zhang, Yiben Xia, Linjun Wang, Beibei Gu,