Design and performance of an ionisation chamber for the measurement of low alpha-activities

Hartmann, Andreas; Hutsch, J.; Krüger, Felix; Sobiella, M.; Wilsenach, H.; Zuber, Κ.

doi:10.1016/j.nima.2016.01.033

Cited by 19 publications

(15 citation statements)

References 31 publications

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“…The majority of the events were above 5 MeV as the events originate from Rn-decay products due to the sample changing process and a tiny leak. The design of the chamber and its performance is discussed in more detail in [12].…”

Section: Methodsmentioning

confidence: 99%

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A new precision measurement of the α -decay half-life of 190 Pt

Braun¹,

Georgiev²,

Schönherr³

et al. 2017

Physics Letters B

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A laboratory measurement of the α-decay half-life of 190 Pt has been performed using a low background Frisch grid ionisation chamber. A total amount of 216.60(17) mg of natural platinum has been measured for 75.9 days. The resulting half-life is (4.97 ± 0.16) × 10 11 years, with a total uncertainty of 3.2%. This number is in good agreement with the half-life obtained using the geological comparison method.

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Section: Methodsmentioning

confidence: 99%

“…A small number of events are lost due to the inefficiencies of the data cuts and the detection characteristics. This is given as the detection efficiency which was previously measured to be 98.6(22)% [12]. A Monte Carlo simulation was performed using the GEANT simulation package.…”

Section: Measurementmentioning

confidence: 99%

A new precision measurement of the α -decay half-life of 190 Pt

Braun¹,

Georgiev²,

Schönherr³

et al. 2017

Physics Letters B

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“…The counting efficiency of the TF-GIC was measured in various ways. A detailed paper was published on this subject [9]. The energy spectra were analysed using the ROOT class TFractionFitter.…”

Section: Resultsmentioning

confidence: 99%

“…To accurately measure an activity in the order of 100 counts per day (c.p.d) an ultra low-background Twin Frisch-Grid Ionisation Chamber (TF-GIC) was used [9]. The chamber is constructed from radio pure materials to lower the intrinsic radioactive background.…”

Section: Methodsmentioning

confidence: 99%

High precision half-life measurement of Sm147α decay from thin-film sources

Wilsenach

Zuber

Degering³

et al. 2017

Phys. Rev. C

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An investigation of the α-decay of 147 Sm was performed using an ultra low-background Twin Frisch-Grid Ionisation Chamber (TF-GIC). Four natural samarium samples were produced using pulsed laser deposition in ultra high vacuum. The abundance of the 147 Sm isotope was measured using inductively coupled plasma mass spectrometry. A combined half-life value for 147 Sm of 1.079(26) × 10 11 years was measured. A search for the α-decay into the first excited state of 143 Nd has been performed using γ-spectroscopy, resulting in a lower half-life limit of T 1/2 > 3.1 × 10 18 years (at 90% C.L.).Usage: Secondary publications and information retrieval purposes.

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“…The energy and resolution of the chamber was calibrated with an 239 Pu, 241 Am, 244 Cm mixed α standard for high energy and a 147 Sm sample for lower energy. More detail about the design and performance can be found in [9].…”

Section: Detectormentioning

confidence: 99%

A low background ionisation chamber for alpha-spectroscopy

et al. 2017

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Abstract. The goal of designing a low background ionisation chamber is to measure long lived α-decay halflives which might interfere with rare event searches. Such decays play a part in many fields in nuclear physics and are difficult to measure. A lot of Geiger-Nutall studies also depend on them. Among others the research is specifically aimed at the precision measurements of α emitters mainly within the Lanthanide region. The excellent energy resolution would also allow to search for excited states in α-decays. To achieve this goal a gridded ionisation chamber was constructed using the Frisch-Grid design. A background rate of only 10.9(6) counts per day has been achieved in the energy region of 1 MeV to 9 MeV and improvements are possible. This low background rate and size of the chamber allows precision measurements of long living alpha decays with half-lives in the region of 1 × 10 15 years.

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Design and performance of an ionisation chamber for the measurement of low alpha-activities

Cited by 19 publications

References 31 publications

A new precision measurement of the α -decay half-life of 190 Pt

A new precision measurement of the α -decay half-life of 190 Pt

High precision half-life measurement of Sm147α decay from thin-film sources

A low background ionisation chamber for alpha-spectroscopy

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