Response of Si detectors to electrons, deuterons and alpha particles

Bauer, Péter; Bortels, G.

doi:10.1016/0168-9002(90)90777-4

Cited by 33 publications

(7 citation statements)

References 14 publications

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“…More generally, it applies to every peak which interferes with the tailing of a higher-energy peak and vice versa. Also, the uncertainties assigned to mathematical corrections for summing-in and summing-out effects should be propagated by equation (11).…”

Section: Constraintsmentioning

confidence: 99%

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Typical uncertainties in alpha-particle spectrometry

Pommé

2015

Metrologia

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Alpha-particle spectrometry is routinely performed with the aim of measuring absolute activities, activity ratios between different alpha-emitting nuclides or decay data such as branching factors, alpha emission probabilities and relative half-lives. It is most commonly performed with ion-implanted silicon detectors. Strong features of the technique are the low background levels that can be achieved due to low sensitivity to other types of radiation, the intrinsic efficiency close to 1 which reduces the efficiency calculations to a geometrical problem and the uniqueness of the energy spectra for each α-decaying nuclide. The main challenge is the limitation to the attainable energy resolution, even with thin and homogenous sources, which causes alpha energy peaks to be partially unresolved due to their width and low-energy tailing. The spectral deconvolution often requires fitting of analytical functions to each peak in the alpha spectrum. True coincidence effects between alpha particles and subsequently emitted conversion electrons cause distortions of the alpha spectra which lead to significant changes in the apparent peak area ratios. Optimum energy resolution can only be achieved on very thin sources, which puts constraints on the source preparation techniques. Radiochemical separations may be needed to extract the alpha emitters from voluminous matrices and efficiency tracing is performed by adding in another isotope by known amounts. Typical uncertainty components are discussed by means of some hypothetical examples.

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Section: Constraintsmentioning

confidence: 99%

“…Alpha spectrometry with silicon detectors is also imperfect with respect to linearity between pulse height and particle energy [11]. Underlying reasons are that energy loss in dead layers varies with the particle's energy and the required energy for creating an electron-hole pair depends on the stopping power [12].…”

Section: Introductionmentioning

confidence: 99%

Typical uncertainties in alpha-particle spectrometry

Pommé

2015

Metrologia

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“…The nonlinear response of silicon detectors to alpha particle absorption was used to correct these spectra [29], [30]. The particle energy, , which is effectively converted to electron-hole pairs, is where the initial kinetic energy of the alpha particle is , the energy absorbed by the source is , the energy absorbed by the aluminum window is , and the energy deposited in the silicon lattice is .…”

Section: Transfer Characteristic and Homogeneitymentioning

confidence: 99%

A High-Speed One-Dimensional Detector for Time-Resolved Small-Angle X-Ray Scattering: Design and Characterization

Lurgio

Drake

Kreps

et al. 2010

IEEE Trans. Nucl. Sci.

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A high-speed one-dimensional detector for time-resolved small-angle x-ray scattering has been designed and built for experiments at the Advanced Photon Source of Argonne National Laboratory. This detector is made from a 500-m thick by 150-mm diameter ultra-high-purity n-type silicon wafer. The electrodes, which are a series of concentric rings that are deposited in the wafer, integrate the scattered x-rays over the azimuthal angle and, thereby, produce a one-dimensional detector. This design yields 128 rings, which allows parallel processing of the signal from each ring. The readout electronics consist of transimpedance front-end amplifiers, one for each ring, followed by active pulse-shaping filters. The amplifier signals are digitized using 12-bit analog-to-digital converters, one per ring, which operate at 20 MHz. The frame rate of the system is 271 kHz. Up to 2 20 1 scattering profiles may be stored on a random access memory chip and transferred to a data file at a rate of 16 10 3 profiles/sec. For X-ray energies between 3.5 and 13.2 keV the efficiency exceeds 80%. The resolving time of the electronics is 300 ns, which is sufficient to isolate electronically a single pulse of scattered x-rays when the synchrotron is operated in a hybrid or asymmetric fill pattern. Therefore, laser-pump/x-ray-probe experiments can be performed without a mechanical shutter. Examples of time-resolved speckle and the kinetics of the formation of sodium chloride particles are presented. This detector is capable of acquiring small-angle x-ray scattering profiles over multiple time scales, which are needed to characterize many chemical, physical, and biological processes.In addition, this detector may be tested and calibrated before experimental runs, without access to an intense beam of x-rays, with alpha particles from a radioactive source such as 241 Am.Index Terms-Front-end electronics, silicon-strip detector, small-angle x-ray scattering, time-resolved small-angle x-ray scattering, x-ray detector.

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“…Following Ref. [46], the calibrated energies were corrected for the detector dead layer, nonionizing energy losses (NIELs), and the silicon energy-response non-linearity [46,47]. The datacollection system non-linearity was also accounted for [48].…”

mentioning

confidence: 99%

“…α-energy calibration-The largest contributions arise from several energy corrections during the calibration process: energy lost through the 100-nm-thick DSSD dead layer, fitted distributions of the NIEL generated in TRIM [59], and the measured silicon energy-response non-linearity parameters (uncertainties taken from Refs. [47,60]). The combined systematic uncertainty of |C T /C A | 2 for the α-energy calibration is 0.0007.…”

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confidence: 99%

Improved Limit on Tensor Currents in the Weak Interaction from $^8$Li $β$ Decay

Burkey,

Savard,

Gallant

et al. 2022

Preprint

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The electroweak interaction in the Standard Model (SM) is described by a pure vector-axialvector structure, though any Lorentz-invariant component could contribute. In this work, we present the most precise measurement of tensor currents in the low-energy regime by examining the β-ν correlation of trapped 8 Li ions with the Beta-decay Paul Trap. We find a βν = −0.3325±0.0013stat ± 0.0019syst at 1σ for the case of coupling to right-handed neutrinos (CT = −C T ), which is consistent with the SM prediction.

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Response of Si detectors to electrons, deuterons and alpha particles

Cited by 33 publications

References 14 publications

Typical uncertainties in alpha-particle spectrometry

Typical uncertainties in alpha-particle spectrometry

A High-Speed One-Dimensional Detector for Time-Resolved Small-Angle X-Ray Scattering: Design and Characterization

Improved Limit on Tensor Currents in the Weak Interaction from $^8$Li $β$ Decay

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