Neutron transmutation doped natural and isotopically engineered germanium thermistors

Details Neutron transmutation doped natural and isotopically engineered germanium thermistors Neutron transmutation doped natural and isotopically engineered germanium thermistors

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2198..630h&link_type=abstract

Proc. SPIE Vol. 2198, p. 630-637, Instrumentation in Astronomy VIII, David L. Crawford; Eric R. Craine; Eds.

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We report on the development, fabrication and performance of a new class of thermal sensors for far IR and millimeter wave detection. These devices consist of small single crystal samples of ultra-pure, natural or isotopically engineered germanium which have been doped by the neutron transmutation doping (NTD) technique. The concentrations of the acceptor and donor dopants (N(subscript A),N(subscript D)) can be accurately controlled with this technique. They depend on the thermal neutron fluence, the neutron absorption cross sections and the atomic fractions of (superscript 70)Ge (for the Ga acceptors) and (superscript 74)Ge (for the As donors), respectively. The values of N(subscript A) and N(subscript D) and their ratio result in a predictable resistivity of the Ge crystals down to temperatures of a few milliKelvin. The excellent control of the resistivity down to very low temperatrues, together with the development of ohmic contacts working at the lowest temperatures, allows the fabrication of high sensitivity bolometer arrays with over 100 pixels and highly uniform response.

Affiliated with

Also associated with

No associations

Rating

Neutron transmutation doped natural and isotopically engineered germanium thermistors does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Neutron transmutation doped natural and isotopically engineered germanium thermistors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutron transmutation doped natural and isotopically engineered germanium thermistors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1508887