The14N(n, p)14C reaction cross section for thermal neutrons

Gledenov, Yu. M.; Salatski, V. I.; Sedyshev, P.

doi:10.1007/bf01292522

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…10Experimental results of σ( 14 N), the cross section of the 14 N(n,p)14 C reaction at the neutron velocity of 2200 m/s. The weighted mean from the previous results (open circles)[16,30,31,32,33,34] was 1.84 ± 0.03 b with χ 2 /ndf of 11.78/5 (gray band). The measurement result from this work is 1.868 ± 0.006 b (closed circle).…”

mentioning

confidence: 75%

Improved determination of thermal cross section of 14N(n,p)14C for the neutron lifetime measurement

Kitahara¹,

Hirota²,

Ieki³

et al. 2019

Preprint

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mentioning

confidence: 75%

Improved determination of thermal cross section of 14N(n,p)14C for the neutron lifetime measurement

Kitahara¹,

Hirota²,

Ieki³

et al. 2019

Preprint

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“…For thermal neutrons: 14 N+n ---→ 14 C+p+625.89 keV and for fast neutrons: 14 N+n ---→ 11 B+α-158 keV. The cross section for the thermal neutron (1.8Å) capture reaction with nitrogen is 1.83 b [42]. The efficiency is a function of the N 2 pressure: the The neutron (grey) hits the atom of 14 N and releases proton and Lithium (red solid lines).…”

Section: Principle Of Operationmentioning

confidence: 99%

First evaluation of a novel ionisation chamber for thermal neutron beam monitoring

Maulerova

Kanaki

Klein³

et al. 2022

EPJ Techn Instrum

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The European Spallation Source ERIC (ESS), currently under construction in Lund, Sweden is a facility established to deliver the highest integrated neutron flux originating from a pulsed source with the aim of supporting an initial fifteen neutron instruments for cutting edge science experiments. This in turn requires reliable monitoring at complex neutron beam lines: in particular, linearity, timing capability, adaptability of the design for various flux ranges (dynamic range) and sensitivity to neutrons within the range of 0.6-10Å are expected from the neutron beam monitors to be installed at the ESS beam lines. Additionally, operational stability and low attenuation are also desirable characteristics for such neutron beam monitoring. A prototype neutron beam monitor based on the ionisation chamber principle and a boron converter, designed by CDT CASCADE Detector Technologies GmbH and ESS, has been investigated at the BER-II research reactor of Helmholtz Zentrum Berlin (HZB). The effort to design and investigate a thermal neutron ionisation beam monitor was initiated by adapting the concept of ionisation chambers previously known elsewhere. So far all the characterised neutron beam monitors discriminate neutron hits on a discrete event basis (pulse mode), whereas the beam monitor prototype introduced in this paper estimates the total flux as a function of current (current mode). While most other neutron beam monitoring devices and detectors rely upon a signal amplifying gain stage, the ionisation chamber operates without any gain and is consequently robust against typical detector ageing effects that compromise the sensitivity over time. The initial tests were performed at the ESS V20 test beam line under realistic conditions resembling those of the future pulses of ESS. The linearity is demonstrated for 3Å pulses in the flux range of 2-3 × 105 n/s/cm2 and for white pulses (0.6-10Å) in the range of 1-5 × 106 n/s/cm2. The timing behaviour resembles the data previously recorded at the V20 beam lines. This novel implementation of a neutron sensitive ionisation chamber shows great promise for beam monitoring and diagnostics at ESS. As the ionisation beam monitor itself is an entirely passive device, it is adequately robust to be employed in areas of high irradiation where no regular servicing or maintenance can be provided.

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“…reaction up to E n = 20 M eV . The cross section for the thermal neutron detection is 1.83 barn [7] and for fast neutron detection is presented in figure 3. The endothermic reaction is the one with the most significant contribution to fast neutron detection for incident neutron energies greater than 1.7 M eV , since the cross section of the 14 N (n, α)B 11 reaction is higher than that of the 14 N (n, p)C 14 reaction after this energy value.…”

Section: The Neutron Detectionmentioning

confidence: 99%

Neutron spectroscopy with the Spherical Proportional Counter based on nitrogen gas

Bougamont¹,

Dastgheibi²,

Derré³

et al. 2017

Nuclear Instruments and Methods in Physics Research Section A:

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The14N(n, p)14C reaction cross section for thermal neutrons

Cited by 10 publications

References 4 publications

Improved determination of thermal cross section of 14N(n,p)14C for the neutron lifetime measurement

Improved determination of thermal cross section of 14N(n,p)14C for the neutron lifetime measurement

First evaluation of a novel ionisation chamber for thermal neutron beam monitoring

Neutron spectroscopy with the Spherical Proportional Counter based on nitrogen gas

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