DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD0773647
Title:
Structural Properties of Amorphous Semiconductors by Mossbauer Spectroscopy
Corporate Author:
JOHNS HOPKINS UNIV LAUREL MD APPLIED PHYSICS LAB
Report Date:
1973-11-30
Abstract:
Comparison of the 125Te Mossbauer spectra in amorphous and crystalline Te films indicates that in the amorphous phase the quadrupole splitting is about 20 greater and the recoil-free fraction about one-third as great as in the crystalline phase. The increase in quadrupole splitting is interpreted as indicating a decrease of about 3 in the length of the covalent bond between the nearest neighbor Te atoms in the amorphous state. The decrease in recoil-free fraction in the amorphous film is explained as due to dangling bonds at the ends of the Te chains which are responsible for a change in the density of phonon states in the system. A short paper covering this work has been prepared and is included as an Appendix to this report.
Descriptive Note:
Semiannual technical rept. no. 3
Supplementary Note:
See also report dated 31 May 1973, AD763408.
Pages:
0016
Distribution Statement:
Approved for public release; distribution is unlimited.
Contract Number:
N00017-72-C-4401
Contract Number 2:
ARPA ORDER-1562
File Size:
0.85MB
