Precision measurements of X- and gamma-ray intensities in 192Ir, 160Tb, 169Yb and 152Eu decays

doi:10.1016/0168-9002(86)91281-7

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Volume 245, Issues 2–3, 1 May 1986, Pages 447-454

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Abstract

The relative intensities of X-rays and gamma-rays in the decays of ¹⁹²Ir, ¹⁶⁰Tb, ¹⁶⁹Yb and ¹⁵²Eu have been measured with better precision using a coaxial 64.1 cm³ high-purity Ge(HPGe) detector, a 28.27 mm² × 5.0 mm vertical plane HPGe detector and a 28.27 mm² × 5.5 mm vertical Si(Li) detectors. The intensities of different K and L X-rays in ¹⁶⁰Tb decay and different L X-rays in ¹⁵²Eu and ¹⁶⁹Yb decays are measured for the first time. This set of sources can be used for the efficiency calibration of semiconductor detectors over the energy range 5–1400 keV.

References (21)

Jilong Jin et al.
Nucl. Instr. and Meth.
(1983)
Yoshei Iwata et al.
Nucl. Instr. and Meth.
(1984)
R.J. Gehrke et al.
Nucl. Instr. and Meth.
(1977)
J.T. Routti et al.
Nucl. Instr. and Meth.
(1969)
Klaus Debertin
Nucl. Instr. and Meth.
(1979)
M.A. Ludington et al.
Nucl. Phys.
(1968)
G.E. Keller et al.
Nucl. Phys.
(1970)
P. Alexander et al.
Nucl. Phys.
(1963)
K. Debertin
Nucl. Instr. and Meth.
(1979)
M.L. Garg et al.
J. Phys. B
(1984)

There are more references available in the full text version of this article.

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Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

Abstract

References (21)

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Instr. and Meth.

Nucl. Phys.

Nucl. Phys.

Nucl. Phys.

Nucl. Instr. and Meth.

J. Phys. B

Cited by (39)

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Determination of the emission probabilities of the principal γ-rays for <sup>134</sup>Cs to a high precision

Absolute measurements of photon emission probabilities of <sup>169</sup>Yb