GAUSS VII, a computer program for the analysis of γ-ray spectra from Ge semiconductor spectrometers

Helmer, R.G.; McCullagh, C. M.

doi:10.1016/0167-5087(83)90385-x

Cited by 25 publications

(10 citation statements)

References 11 publications

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“…For both Sb spectra the energy calibration was performed in the usual way by first tabulating γ-ray energy as a function of ADC channel number. A least-squares fit was performed on each peak using a symmetric Gaussian function on top of a linear background with the centroids and uncertainties determined from the fits using the γray spectroscopy analysis software gauss [15]. Such a function provided good fits for all peaks above ∼250 keV.…”

Section: Discussionmentioning

confidence: 99%

Revision of forensics-relevant nuclear data in Sb127 β decay

et al. 2019

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With a half-life of 3.85(5) days, the fission product 127 Sb is potentially useful for the characterization of fallout debris that would be collected for forensic analysis following a hypothetical nuclear event. The β decay of 127 Sb has many characteristic γ-ray lines, however the majority of decay strength is concentrated in the three strongest lines near 686, 473, and 784 keV, based on lowprecision spectroscopic measurements from decades ago. In a new measurement of 127 Sb β decay, obtained from radiochemical separations of U photofission products, we show that the energies of the 686 and 784 lines are actually shifted lower by 0.8 and 1.1 keV, respectively. Such large discrepancies in the nuclear data inhibit accurate isotopic analyses and have important implications, for example, on the assessment of fission debris that might be collected in the days following a nuclear event. Therefore, a new evaluation of 127 Sb β decay and appropriate revisions to the various nuclear databases are warranted. This paper reports a new set of γ-ray energies and relative intensities corresponding to 127 Sb decay.

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Section: Discussionmentioning

confidence: 99%

Revision of forensics-relevant nuclear data in Sb127 β decay

et al. 2019

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“…That allows us to represent to soft step with a complementary error function having the same width and the same center as the photo peak (2). The use of this function to parameterize step-like backgrounds in gamma spectra has been reported by several authors in the past [30,31,33,34].…”

Section: Article In Pressmentioning

confidence: 96%

“…Since the high energy tail, caused by pile-up, has almost the same shape, we use even there the product of an exponential with negative slope and an error function for representation (4) [30,34]. According to considerations made in Ref.…”

Section: Article In Pressmentioning

confidence: 99%

“…For the low energy tailing, due to incomplete charge collection in the detector crystal, a sufficiently accurate representation is an exponential function convoluted with the same Gaussian [30,31,33,34]. This convolution results mathematically in a product of an exponential with positive slope and a complementary error function with the width of the peak (3).…”

Section: Article In Pressmentioning

confidence: 99%

“…In contrast to a 22 Na source, this intrinsic contribution is rather small for a 68 Ge source. According to literature this background can be approximated by a low-order polynomial or even by a constant in the energy region of the photo peak [30].…”

Section: Physical Aspectsmentioning

confidence: 99%

See 2 more Smart Citations

Analyzing the high-momentum part of positron annihilation Doppler spectra with a single germanium detector

Haaks¹,

Staab²,

Maier³

2006

Nuclear Instruments and Methods in Physics Research Section A:

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Chemical sensitivity in positron annihilation with just one single Ge detector

Haaks

Staab

Saarinen

et al. 2005

Physica Status Solidi (a)

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We present a novel method for analyzing the data from momentum distribution measurements employing positron annihilation, using just one single Ge‐detector, but employing a mathematically sufficiently well suited model for background subtraction. For a variety of high purity metals the resulting momentum distributions have exactly the same shapes up to 35 × 10–3 m0c as those obtained with coincidence Doppler broadening of the annihilation radiation using a two‐detector system. This data analysis applies to any positron source without high energy gammas or a slow positron beam system with just a single Ge‐detector and enables the possibility of analysing the chemical surrounding at the positron trapping site without any additional hardware. In particular, in combination with a slow positron microbeam, it allows a spatially resolved measurement of the electron's momentum distribution. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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GAUSS VII, a computer program for the analysis of γ-ray spectra from Ge semiconductor spectrometers

Cited by 25 publications

References 11 publications

Revision of forensics-relevant nuclear data in Sb127 β decay

Revision of forensics-relevant nuclear data in Sb127 β decay

Analyzing the high-momentum part of positron annihilation Doppler spectra with a single germanium detector

Chemical sensitivity in positron annihilation with just one single Ge detector

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