Toroidal proportional detector for conversion X-ray and transmission Mössbauer spectroscopy

Bibicu, I.; Rogalski, M.S.; Nicolescu, G.

doi:10.1016/0168-583x(94)95373-2

Cited by 11 publications

(6 citation statements)

References 3 publications

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“…It has the following main advantages: (1) the height of the detection volume can be changed in large limits from 0 to 38 mm, (2) the detection volume can be choose symmetrical or not in respect with anode plan, (3) the anode replacement is easily and (4) different anode configuration can be used. The counter design is better than previously reported [6][7][8]. The device can be applied to study both surface and bulk phenomena…”

Section: Discussionmentioning

confidence: 97%

A versatile gas-flow proportional counter for Mössbauer spectroscopy

2009

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This article presents a versatile gas-flow proportional counter for surface and transmission Mössbauer spectroscopy, suitable for studies with 57 Fe, 119 Sn and 151 Eu isotopes. The main advantages obtained by new design are: (1) the height of the detection volume can be changed in large limits from 0 to 38 mm, (2) the detection volume can be choose symmetrical or not in respect with anode plan, (3) the anode replacement is easily (4) and different anode configuration can be used. The characteristics of the detector, operating at room temperature, are reported.

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Section: Discussionmentioning

confidence: 97%

A versatile gas-flow proportional counter for Mössbauer spectroscopy

2009

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“…The first appearance of an XBS detector was given by Swanson et al [5] 3 years later in 1970. The XBS detector was then later designed to also count both X-rays and conversion electrons simultaneously [12], and eventually transmission γ -rays are also included [10,13]. The detector used for XBS in this study is the same continuousflow gas-filled proportional counter as that described in Section 2.1, save for a few details.…”

Section: Xbs Detector Designmentioning

confidence: 99%

“…14.4keV γ 14.4keV γ 14.4keV (10%) γ (a) 13.3keV CE (10%) L K (b) 7.3keV CE (80%) Figure 1 Internal processing of incident γ -radiation in 57 Fe. The nucleus may a re-emit a 14.4 keV γ -ray (10%) or b transfer the energy to shell electrons through virtual photons, emitting K-level (7.3 keV at 80%) and L-level (13.3 keV at 10%) conversion electrons [4].…”

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confidence: 98%

Studying surfaces and thin films using Mössbauer spectroscopy

2006

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Using a series of bi-layer samples, we show how Conversion Electron Mössbauer Spectroscopy (CEMS) and X-ray Backscatter Mössbauer Spectroscopy (XBS) can be done with the same experimental set up. The penetration depths of the K and L conversion electrons are measured as 51 (6) and 330(240) nm, respectively, with relative contributions of 88(9) and 12(9)%. The penetration depth of the Fe-K α X-ray signal is determined to be 3.6(2) μm. As a demonstration we show data on surface damage effects in electropolished TRIP steels, and by comparing CEMS and XBS Mössbauer patterns we estimate the thickness of a damaged layer (created by sanding) to be 550(50) nm.

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“…The CEMS measurement, effected with our CEMS detector, [35,36] was conducted to a high degree of accuracy, ensuring the same geometry of the detection space, and same gas flow rate for all the samples. The parameters of the Mössbauer spectra were calculated using a computer-fitting program, which assumes a Lorentzian line shape.…”

Section: Mössbauer Spectrometrymentioning

confidence: 99%

Kinetics corrosion process of carbon steel in hydrochloric acid in absence and presence of 2‐(cyclohexylaminomercapto) benzothiazole

Samide

Bibicu

2008

Surface & Interface Analysis

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The corrosion and inhibition behavior of carbon steel in 1 M HCl in the presence of 2-(cyclohexylaminomercapto) benzothiazole (CMB) was investigated using weight-loss measurements, galvanostatic polarization studies and UV-VIS spectrophotometry. The morphology of a surface was analyzed by using Mössbauer spectroscopy. Some samples were examined by scanning electron microscopy. The inhibition efficiency increased with increasing CMB concentration and decreased with increasing temperature of the corrosion medium. The activation energy (E a ) was determined from Arrhenius equation. The activation enthalpy ( H 0 ) and the activation entropy ( S 0 ) were calculated from the diagram of the transition state. The experimental results suggest that the presence of CMB in the solution increases the surface coverage (θ ) and therefore, indicates the adsorption of CMB. The adsorption of this compound on the metal surface is found to obey Langmuir's adsorption isotherm. The UV-VIS spectrophotometry shows a decrease of the concentration of CMB in HCl solution after corrosion, indicating that an adsorption process occurs between an organic compound from aqueous phase and the electrode surface. From the Mössbauerspectroscopy studied at this stage, it is expected that the main product of corrosion is a nonstoichiometric amorphous Fe 3+ oxyhydroxide, consisting of a mixture of α, β and γ -FeOOH, where γ -FeOOH is the main phase.

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Toroidal proportional detector for conversion X-ray and transmission Mössbauer spectroscopy

Cited by 11 publications

References 3 publications

A versatile gas-flow proportional counter for Mössbauer spectroscopy

A versatile gas-flow proportional counter for Mössbauer spectroscopy

Studying surfaces and thin films using Mössbauer spectroscopy

Kinetics corrosion process of carbon steel in hydrochloric acid in absence and presence of 2‐(cyclohexylaminomercapto) benzothiazole

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