Measured quantity:
Ambient dose Equivalent H*(10) for neutrons

Measuring range:
30 nSv/h to 100 mSv/h

Neutron Energy range:
Thermal to 20 MeV

Calibration Spectrum:
Bare Cf-252

Fluence response:
1.09 cm²

Ambient dose equivalent response:
2.83 counts per µSv or
0.79 cps per µSv/h

Calibration Factor:
1.27 µSv/h per cps

Response functions:
Numerical values of fluence response function and
dose rate response function available in the operating
manual as functions of neutron energy from thermal
energies up to 20 MeV

Fluence-to-dose conversion factors:
B.R.L. Siebert und H. Schumacher.
Radiation Protection Dosimetry,
Vol. 58, Vo. 3, pp. 177-183, 1995

Energy dependency:
± 30% between 50 keV and 10 MeV

Gamma-Sensitivity:
< 40 µSv/h in 10 mSv/h, 137 Cs Gamma field

Temperature Range:
-10°C to 50°C

Moderator’s Diameter:
Ø 250 mm

Patents:
German Patent 19627264 granted Oct-23 1997
German Patent 4344955 granted Feb-16-1995

References:
The neutron fluence and H* (19) response
of the new LB6411 remcounter

B. Burgkhardt, G. Fieg, A. Klett, A. Plewnia
and B.R.L. Siebert

Radiation Protection Dosimetry
Vol. 70, Nos. 1-4, pp.361-364, 1997

The new Remcounter LB6411:
Measurement of neutron ambient dose equivalent
H* (10) according to ICRP60 with high sensitivity

A. Klett and B. Burgkhardt,

IEEE Transactions on Nuclear Science,
Vol. 44, No. 3, June 1997