Pile-up corrections for high-precision superallowed decay half-life measurements via -ray photopeak counting

Grinyer, G. F.; Svensson, C. E.; Andreoiu, C.; Andreyev, A. N.; Austin, R. A. E.; Ball, G. C.; Bandyopadhyay, D.; Chakrawarthy, R. S.; Finlay, P.; Garrett, P. E.; Hackman, G.; Hyland, B.; Kulp, W. D.; Leach, K. G.; Leslie, J. R.; Morton, A. C.; Pearson, C. J.; Phillips, A. A.; Sarazin, F.; Schumaker, M. A.; Smith, M. B.; Valiente-Dobón, J.J.; Waddington, J. C.; Williams, S. J.; Wong, J.; Wood, John L.; Zganjar, E. F.

doi:10.1016/j.nima.2007.05.323

Cited by 29 publications

(26 citation statements)

References 15 publications

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“…Following dead-time corrections [17,18], the data were fit using a maximum-likelihood technique described in previous works [17][18][19][20]. The fitting routine included a component for the 14 O activity, the 26 Na activity, the 26 Al m activity, and a constant background.…”

Section: β Counting Resultsmentioning

confidence: 99%

“…More details of the γ -ray detection system used for half-life measurements is provided in Ref. [17]. The nonextendible dead time of the data-acquisition system, as well as the shaping times of the HPGe spectroscopy amplifiers, were varied throughout the experiment in order to investigate possible systematic effects.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, a total of 101 runs were used in the γ -ray analysis. Each was dead-time and pile-up corrected [17,25,26] before being fit. For this experiment, average pile-up corrections were applied where the averaging was performed across those runs with both the same shaping time (0.5/1/2 μs) and the same ion source tune (pre-/post-tune).…”

Section: Thementioning

confidence: 99%

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High-precision half-life measurements for the superallowed Fermiβ+emitter14O

Laffoley¹,

Svensson²,

Andreoiu³

et al. 2013

Phys. Rev. C

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The half-life of the superallowed Fermi β + emitter 14 O has been determined via simultaneous direct β and γ counting experiments at TRIUMF's Isotope Separator and Accelerator (ISAC) facility. A γ -ray counting measurement was performed by detecting the 2312.6-keV γ rays emitted from an excited state of the daughter 14 N following the implantation of samples at the center of the 8π γ -ray spectrometer, a spherical array of 20 high-purity germanium (HPGe) detectors. A simultaneous β counting experiment was performed using a fast plastic scintillator positioned behind the implantation site with a solid angle coverage of ∼20%. The results, T 1/2 (β) = 70.610 ± 0.030 s and T 1/2 (γ ) = 70.632 ± 0.094 s, form a consistent set and, together with eight previous measurements, establish a new average for the 14 O half-life of T 1/2 = 70.619 ± 0.011 s with a reduced χ 2 of 0.99.

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Section: β Counting Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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High-precision half-life measurements for the superallowed Fermiβ+emitter14O

Laffoley¹,

Svensson²,

Andreoiu³

et al. 2013

Phys. Rev. C

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“…Following dead-time corrections [16,17], the ZDS data were fit using a maximum-likelihood technique described in previous works [16][17][18][19]. The fitting routine included a component for the 14 O activity, the 26 Na activity, the 26 Al m activity, and a constant background.…”

Section: Resultsmentioning

confidence: 99%

High-Precision Half-life Measurements for the Superallowedβ⁺Emitter¹⁴O

Laffoley

Svensson

Andreoiu

et al. 2014

EPJ Web of Conferences

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Abstract. The half-life of 14 O, a superallowed Fermi β + emitter, has been determined via simultaneous γ and β counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Following the implantation of 14 O samples at the center of the 8π spectrometer, a γ counting measurement was performed by detecting the 2313 keV γ-rays emitted from the first excited state of the daughter 14 N using 20 high-purity germanium (HPGe) detectors. A simultaneous β counting experiment was performed using a fast plastic scintillator positioned directly behind the implantation site. The results, T 1/2 (γ) = 70.632 ± 0.094 s and T 1/2 (β) = 70.610 ± 0.030 s, are consistent with one another and, together with eight previous measurements, establish a new average for the 14 O half-life of T 1/2 = 70.619 ± 0.011 s with a reduced χ 2 of 0.99.

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“…We correct this by assuming a Poisson distribution of the events around a measured average count rate. With this assumption, we can determine the pile-up probability once we have defined a "pile-up time window" [9]. This time window was determined in a similar fashion as the dead-time correction.…”

Section: Detector Electronics and Data Acquisitionmentioning

confidence: 99%

High-precision efficiency calibration of a high-purity co-axial germanium detector

Blank

Souin

Ascher

et al. 2015

Nuclear Instruments and Methods in Physics Research Section A:

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A high-purity co-axial germanium detector has been calibrated in efficiency to a precision of about 0.15% over a wide energy range. High-precision scans of the detector crystal and γ-ray source measurements have been compared to Monte-Carlo simulations to adjust the dimensions of a detector model. For this purpose, standard calibration sources and short-lived online sources have been used. The resulting efficiency calibration reaches the precision needed e.g. for branching ratio measurements of super-allowed β decays for tests of the weak-interaction standard model.

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Pile-up corrections for high-precision superallowed decay half-life measurements via -ray photopeak counting

Cited by 29 publications

References 15 publications

High-precision half-life measurements for the superallowed Fermiβ+emitter14O

High-precision half-life measurements for the superallowed Fermiβ+emitter14O

High-Precision Half-life Measurements for the Superallowedβ⁺Emitter¹⁴O

High-precision efficiency calibration of a high-purity co-axial germanium detector

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Pile-up corrections for high-precision superallowed decay half-life measurements via -ray photopeak counting

Cited by 29 publications

References 15 publications

High-precision half-life measurements for the superallowed Fermiβ+emitter14O

High-precision half-life measurements for the superallowed Fermiβ+emitter14O

High-Precision Half-life Measurements for the Superallowedβ+Emitter14O

High-precision efficiency calibration of a high-purity co-axial germanium detector

Contact Info

Product

Resources

About

High-Precision Half-life Measurements for the Superallowedβ⁺Emitter¹⁴O