On the Frisch–Grid signal in ionization chambers

Al-Adili, Ali; Hambsch, F.‐J.; Bencardino, R.; Pomp, Stephan; Oberstedt, S.; Zeynalov, Shakir

doi:10.1016/j.nima.2011.12.047

Cited by 31 publications

(15 citation statements)

References 8 publications

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“…All experiments were performed with different cerium-doped lanthanum-bromide (LaBr 3 :Ce) and cerium-bromide detectors of size 5.1 cm × 5.1 cm (diameter × length of the crystal). As fission triggers we used Frisch-grid ionization chambers [49,50] and poly-crystalline diamond detectors [51]. The response of the γ-detectors was simulated with the Monte-Carlo code PENELOPE2011 [52].…”

Section: Neutron-induced Fission Onmentioning

confidence: 99%

“…Here, in first instance, prompt fission γ-ray emission in the thermalneutron-induced fission on 239 Pu will be measured in 2015 under the CHANDA Trans National Access scheme [79] in order to respond to the remaining entry H.4 on the OECD/NEA HPRL. For those measurements an efficient fission trigger like Frisch-grid ionization chambers [49,50] or ultra-fast diamond detectors [51] should be employed.…”

Section: Future γ-Ray Data Needsmentioning

confidence: 99%

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Future research program on prompt $\gamma$ -ray emission in nuclear fission

et al. 2015

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Abstract. In recent years the measurement of prompt fission γ-ray spectra (PFGS) has gained renewed interest, after about forty years since the first comprehensive studies of the reactions 235 U(n th , f), 239 Pu(n th , f) and 252 Cf(sf). The renaissance was initiated by requests for new values especially for γ-ray multiplicity and average total energy release per fission in neutron-induced fission of 235 U and 239 Pu. Both isotopes are considered the most important ones with respect to the modeling of innovative cores required for the Generation-IV reactors, the majority working with fast neutrons. During the last 5 years we have conducted a systematic study of spectral data for thermal-neutron-induced fission on 235 U and 241 Pu as well as for the spontaneous fission of 252 Cf with unprecedented accuracy. From the new data we conclude that those reactions do not considerably contribute to the observed heat excess and suspect other reactions playing a significant role. Possible contributions may originate from fast-neutron-induced reactions on 238 U, which is largely present in the fuel, or from γ-induced fission from neutron capture in the construction material. A first experiment campaign on prompt γ-ray emission from fast-neutron-induced fission on 235,238 U was successfully performed in order to test our assumptions. In the following we attempt to summarize, what has been done in the field to date, and to motivate future measurement campaigns exploiting dedicated neutron and photon beams as well as upcoming highly efficient detector assemblies.

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Section: Neutron-induced Fission Onmentioning

confidence: 99%

Section: Future γ-Ray Data Needsmentioning

confidence: 99%

Future research program on prompt $\gamma$ -ray emission in nuclear fission

et al. 2015

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“…It is shown in [7] that the centre of charge of an event can be obtained from the pulse shape. This is given by the ratio of the grid and anode pulse.…”

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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“…Three variations of angular determination technique are used: grid method, 6 drift-time method and collection time method. 7 Further details are given in Sec.…”

Section: Data Correction and Analysismentioning

confidence: 99%

A double-Bragg detector with digital signal processing for the event-by-event study of fission in actinide nuclei

Frost

Smith

2016

Int. J. Mod. Phys. Conf. Ser.

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In the current paper, a windowless double-Bragg chamber incorporating full signal digitisation has been developed for the purpose of studying the energy (E), mass (A), charge (Z) and angular distributions (θ, Φ) of nuclei generated by fission. This device measures E for each fission fragment by collection of the charge produced during ionisation of the fill gas. Subsequent digitisation of the signals from each of two anodes yields information on dE/dx, as well as electron collection time, which can be further used for polar angle (θ) determination. Frisch-grid and cathode signals are also digitised and are used both for anode signal correction and to produce further information on θ. To verify the operation of this detector, three angular determination techniques from the literature were implemented, and the results were found to be consistent with the referenced paper. Current results from the spontaneous fission of 252 Cf are presented.

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On the Frisch–Grid signal in ionization chambers

Cited by 31 publications

References 8 publications

Future research program on prompt $\gamma$ -ray emission in nuclear fission

Future research program on prompt $\gamma$ -ray emission in nuclear fission

A low background ionisation chamber for alpha-spectroscopy

A double-Bragg detector with digital signal processing for the event-by-event study of fission in actinide nuclei

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