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Title: NTD germanium: a novel material for low-temperature bolometers

Abstract

Six samples of ultra-pure (absolute value N/sub A/ - N/sub D/ absolute value less than or equal to 10/sup 11/cm/sup -3/), single-crystal germanium have been neutron transmutation doped with neutron doses between 7.5 x 10/sup 16/ and 1.88 x 10/sup 18/cm/sup -2/. After thermal annealing at 400/sup 0/C for six hours in a pure argon atmosphere, the samples have been characterized with Hall effect and resistivity measurements between 300 and 0.3 K. Our results show that the resistivity in the low temperature, hopping conduction regime can be approximated with rho = rho/sub 0/exp(..delta../T). The three more heavily doped samples show values for rho/sub 0/ and ..delta.. ranging from 430 to 3.3 ..cap omega.. cm and from 4.9 to 2.8 K, respectively. The excellent reproducibility of neutron transmutation doping and the values of rho/sub 0/ and ..delta.. make NTD Ge a prime candidate for the fabrication of low temperature, low noise bolometers. The large variation in the tabulated values of the thermal neutron cross sections for the different germanium isotopes makes it clear that accurate measurements of these cross-sections for well defined neutron energy spectra would be highly desirable.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
5224080
Report Number(s):
LBL-14649; CONF-8206100-1
ON: DE82018580
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 4. international neutron transmutation doping conference, Gaithersburg, MD, USA, 1 Jun 1982
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BOLOMETERS; FABRICATION; ULTRALOW TEMPERATURE; TEMPERATURE MEASUREMENT; ANNEALING; CRYSTAL DOPING; ELECTRIC CONDUCTIVITY; GERMANIUM; HALL EFFECT; MONOCRYSTALS; NEUTRON REACTIONS; TRANSMUTATION; BARYON REACTIONS; CRYSTALS; ELECTRICAL PROPERTIES; ELEMENTS; HADRON REACTIONS; HEAT TREATMENTS; MEASURING INSTRUMENTS; METALS; NUCLEAR REACTIONS; NUCLEON REACTIONS; PHYSICAL PROPERTIES; 420201* - Engineering- Cryogenic Equipment & Devices

Citation Formats

Haller, E E, Palaio, N P, Rodder, M, Hansen, W L, and Kreysa, E. NTD germanium: a novel material for low-temperature bolometers. United States: N. p., 1982. Web.
Haller, E E, Palaio, N P, Rodder, M, Hansen, W L, & Kreysa, E. NTD germanium: a novel material for low-temperature bolometers. United States.
Haller, E E, Palaio, N P, Rodder, M, Hansen, W L, and Kreysa, E. 1982. "NTD germanium: a novel material for low-temperature bolometers". United States. https://www.osti.gov/servlets/purl/5224080.
@article{osti_5224080,
title = {NTD germanium: a novel material for low-temperature bolometers},
author = {Haller, E E and Palaio, N P and Rodder, M and Hansen, W L and Kreysa, E},
abstractNote = {Six samples of ultra-pure (absolute value N/sub A/ - N/sub D/ absolute value less than or equal to 10/sup 11/cm/sup -3/), single-crystal germanium have been neutron transmutation doped with neutron doses between 7.5 x 10/sup 16/ and 1.88 x 10/sup 18/cm/sup -2/. After thermal annealing at 400/sup 0/C for six hours in a pure argon atmosphere, the samples have been characterized with Hall effect and resistivity measurements between 300 and 0.3 K. Our results show that the resistivity in the low temperature, hopping conduction regime can be approximated with rho = rho/sub 0/exp(..delta../T). The three more heavily doped samples show values for rho/sub 0/ and ..delta.. ranging from 430 to 3.3 ..cap omega.. cm and from 4.9 to 2.8 K, respectively. The excellent reproducibility of neutron transmutation doping and the values of rho/sub 0/ and ..delta.. make NTD Ge a prime candidate for the fabrication of low temperature, low noise bolometers. The large variation in the tabulated values of the thermal neutron cross sections for the different germanium isotopes makes it clear that accurate measurements of these cross-sections for well defined neutron energy spectra would be highly desirable.},
doi = {},
url = {https://www.osti.gov/biblio/5224080}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {6}
}

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