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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Experimental studies of positron annihilation in semiconductors

區皓良, Au, Ho-leung. January 1994 (has links)
published_or_final_version / Physics / Doctoral / Doctor of Philosophy

Some defect studies on the compound semiconductors GaAs, InP and SiC using positron annihilation spectroscopy

Deng, Aihong., 鄧愛紅. January 2000 (has links)
published_or_final_version / Physics / Doctoral / Doctor of Philosophy

Improvement in positron beam optics and some positron beam studies of GaN and Amorphous-si:H thin films

胡一帆, Hu, Yifan. January 2000 (has links)
published_or_final_version / Physics / Doctoral / Doctor of Philosophy

A study of the reaction esup(+)esup(-)-musup(+)musup(-)(gamma) at centre of mass energies up to 46.78GeV

Hawkes, C. M. January 1985 (has links)
No description available.

Positron annihilation at metal surfaces

Brown, A. P. January 1988 (has links)
No description available.

An angular correlation of positron annihilation gamma radiation with a NaI (T1) detector and a Ge (Li) detector

Peacock, Cloyd E. January 1970 (has links)
Several high quality electronic units were previously acquired on an individual basis from various manufacturers. As the second research effort in a planned complementary series of papers, the capability of the total array of equipment to accomplish reliable measurements of nuclear radiation was established.To evaluate the performance of the electronic units when assembled into a working coincidence system with associated test and analysis units, positron emitter, was employed with a copper converter as the source of annihilation gamma rays. The annihilation pair gamma-ray energies was precisely 0.511 MeV and the rays were emitted in opposite directions simultaneously. With a range of results that must be attained known, the equipment was arranged, meticulously calibrated and many coincidence counts completed under widely varied conditions. Resolving time and angular resolution were used as the standards for evaluation of the equipment capability. The resolving time was 29.5 nanoseconds while the angular resolution was 14 degrees. These values indicate a very good capability to proceed with many varieties of nuclear radiation research.

Implementing variable energy positron lifetime spectroscopy based on secondary electron timing from thin carbon foil in transmission geometry

Ng, Cheuk-kwong, 吳卓光 January 2014 (has links)
abstract / Physics / Doctoral / Doctor of Philosophy

Positron beam studies on the electric field at metal-semiinsulating GaAs interfaces

胡一帆, Hu, Yi-fan. January 1997 (has links)
published_or_final_version / Chemistry / Master / Master of Philosophy

Positron lifetime and mobility studies of SiC

張秀霞, Cheung, Sau-ha. January 1998 (has links)
published_or_final_version / Physics / Master / Master of Philosophy

Slow positron annihilation spectroscopy applied to the analysis of the semiconductor, silicide, and titanium nitride structures

Frost, Robert Lewis 08 1900 (has links)
No description available.

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