Optical absorption measurements on silver halides in the ultraviolet and extreme ultraviolet energy ranges

The absorption coefficients of silver chloride and silver bromide have been determined from thin film transmission measurements in the range of photon energy from 3.5 to 6.7 electron volts and from 30 to 240 electron volts. An unusual feature of this work is the use of electron synchrotron radiation for measurements in the high energy range. Optical constants have been calculated over the extended energy range, 3.5 to 240 electron volts. Band gaps have been estimated from the ultraviolet energy data and exciton binding energies. Comparison of ultraviolet structure and extreme ultraviolet structure, and measurements taken at different temperatures give evidence that in the high energy region exciton absorption is insignificant compared to absorption due to band-to-band transitions. A discussion of the conduction band structure of silver chloride is also given.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year dc:date

2011

Author dc:creator

• Carrera, Nicholas John

Contributors dc:contributor

• Brown, Frederick C.

• optical absorption
• silver halides
• ultraviolet
• extreme ultraviolet
• thin film transmission

Statement dc:rights

• 1970 Nicholas John Carrera

Language dc:language

en

Identifier

6063024

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/25852