An Ultralow Background Germanium Gamma-Ray Spectrometer Using Superclean Materials and Cosmic Ray Anticoincidence

Reeves, J.H.; Hensley, W.K.; Brodzinski, R. L.; Ryge, P.

doi:10.1109/tns.1984.4333349

Cited by 23 publications

(2 citation statements)

References 5 publications

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“…Despite the sea level location and the modest shield of the scintillation set-up, the measurements allowed the detection of the internal contamination reasonable narrow energy regions (a few MeV) by an exponential function [22,23,24,25]. of the scintillator by 226 Ra and 228 Th; besides, we have estimated limits on activities of 238 U, 232 Th, 210 Pb, 210 Po, 90 Sr.…”

Section: Low Background Measurements In Scintillation Mode At Sea Levelmentioning

confidence: 99%

Radioactive contamination of SrI2(Eu) crystal scintillator

Belli¹,

Bernabei

Cerulli

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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A strontium iodide crystal doped by europium (SrI2(Eu)) was produced by using the Stockbarger growth technique. The crystal was subjected to a characterization that includes relative photoelectron output and energy resolution for γ quanta. The intrinsic radioactivity of the SrI2(Eu) crystal scintillator was tested both by using it as scintillator at sea level and by ultra-low background HPGe γ spectrometry deep underground. The response of the SrI2(Eu) detector to α particles (α/β ratio and pulse shape) was estimated by analysing the 226Ra internal trace contamination of the crystal. We have measured: α/β=0.55 at View the MathML source, and no difference in the time decay of the scintillation pulses induced by α particles and γ quanta. The application of the obtained results in the search for the double electron capture and electron capture with positron emission in 84Sr has been investigated at a level of sensitivity: View the MathML source. The results of these studies demonstrate the potentiality of this material for a variety of scintillation applications, including low-level counting experiments

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Section: Low Background Measurements In Scintillation Mode At Sea Levelmentioning

confidence: 99%

Radioactive contamination of SrI2(Eu) crystal scintillator

Belli¹,

Bernabei

Cerulli

et al. 2012

Nuclear Instruments and Methods in Physics Research Section A:

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show abstract

“…Counting-Two instruments were used to measure radionuclides in Noblesville: a high efficiency Nal(11) multiparameter gamma spectrometer (to quantify 22Na, 2 6A1, 46Sc, 48V, 5 4Mn, 56Co and 6OCo) and an anti-coincidence-shielded intrinsic Ge gamma spectrometer (for assaying 7Be, 51Cr, 5 4Mn, 5 7Co and 58Co). Further details on these instruments are given by Brodzinski (1973), Perkins et al (1970), Wogman et al (1967, Reeves et at. (1984), andMileyet al (1992).…”

Section: Gamma-ray Spectrometrymentioning

confidence: 99%

Consortium study of the unusual H chondrite regolith breccia, Noblesville

et al. 1993

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Abstract— The Noblesville meteorite is a genomict, regolith breccia (H6 clasts in H4 matrix). Mössbauer analysis confirms that Noblesville is unusually fresh, not surprising in view of its recovery immediately after its fall. It resembles “normal” H4–6 chondrites in its chemical composition and induced thermoluminescence (TL) levels. Thus, at least in its contents of volatile trace elements, Noblesville differs from other H chondrite, class A regolith breccias. Noblesville's small pre‐atmospheric mass and fall near Solar maximum and/or its peculiar orbit (with perihelion <0.8 AU as shown by natural TL intensity) may partly explain its levels of cosmogenic radionuclides. Its cosmic ray exposure age of ∼ 44 Ma, is long, is equalled or exceeded by <3% of all H chondrites, and also differs from the 33 ± 3 Ma mean exposure age peak of other H chondrite regolith breccias. One whole‐rock aliquot has a high, but not unmatched, 129Xe/132Xe of 1.88. While Noblesville is now among the chondritic regolithic breccias richest in solar gases, elemental ratios indicate some loss, especially of He, perhaps b; impacts in the regolith that heated individual grains. While general shock‐loading levels in Noblesville did not exceed 4 GPa, individual clasts record shock levels of 5–10 GPa, doubtless acquired prior to lithification of the whole‐rock meteoroid.

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Methods for achieving ultra-low backgrounds in above-ground germanium detector systems

Arthur

Reeves

1992

Journal of Radioanalytical and Nuclear Chemistry, Articles

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An Ultralow Background Germanium Gamma-Ray Spectrometer Using Superclean Materials and Cosmic Ray Anticoincidence

Cited by 23 publications

References 5 publications

Radioactive contamination of SrI2(Eu) crystal scintillator

Radioactive contamination of SrI2(Eu) crystal scintillator

Consortium study of the unusual H chondrite regolith breccia, Noblesville

Methods for achieving ultra-low backgrounds in above-ground germanium detector systems

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