Meteoric 10Be concentrations in the center of Mexico

Méndez-García, C.; Padilla, S.; Solı́s, C.; Rìos, K. De Los; Chávez, E.; Garcı́a, Rocı́o; Acosta, L.; Huerta, A.

doi:10.1007/s10967-019-06841-x

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…Additionally, for comparison purposes, a previously measured rain sample analyzed with AMS technique is as well reported here. Description of the detailed process for this kind of measurement can be found in [14,15].…”

Section: Methodsmentioning

confidence: 99%

Preliminary Measurements of Be-10/Be-7 Ratio in Rainwater for Atmospheric Transport Analysis

Rìos

Méndez-García

Acosta

et al. 2020

J. Nucl. Phy. Mat. Sci. Rad. A.

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The meteoric cosmogenic beryllium has been used as an essential geophysical tracer in the analysis of atmospheric flows and erosion soils since 1960. The first measurements Be-7 and Be-10 concentrations in rainwater from Mexico, have been carried out by using gamma decay spectroscopy and AMS techniques, respectively for each isotope. With this it was possible to report a preliminar value for the Be-10/Be-7 isotopic ratio in such environmental samples. The present work described preliminary results related to rainwater collected at mountain and metropolitan areas. Results are compared with predictions and previous measurements for both radioisotopes, observing a very sensible behavior particularly for the case of Be-7 activities.

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Section: Methodsmentioning

confidence: 99%

Preliminary Measurements of Be-10/Be-7 Ratio in Rainwater for Atmospheric Transport Analysis

Rìos

Méndez-García

Acosta

et al. 2020

J. Nucl. Phy. Mat. Sci. Rad. A.

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“…Since its inauguration in 2013 a prolific production has been achieved through the precise measurement of the ultra low concentration of naturally occurring radioisotopes in matter ( 10 Be, 14 C and 26 Al). Thousands of samples have been analyzed, some of the more relevant results in applied and interdisciplinary research produced in this facility can be found in [6,7,8,9,10,11,12]. This facility has also been useful for fundamental nuclear physics research [13,14,15,16,17].…”

Section: Introductionmentioning

confidence: 99%

Monoisotopic targets production from atomic and molecular positive ion implantation in a tandem accelerator at low energies

Mas-Ruiz,

Marín-Lámbarri,

Sandoval-Hipólito

et al. 2023

J. Phys.: Conf. Ser.

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We produced monoisotopic targets of 13C and 28,29Si with 1015−16 atoms/cm2 areal density by ion implantation in different matrices at the Accelerator Mass Spectrometry (AMS) facility in Mexico. The tandem accelerator terminal voltage was set at the lowest achievable value (200 kV) that yield beams with energy of 435 keV. It is possible to do ion implantation at lower energies in our facility through the use of molecular beams, so in this work we looked for, and successfully found, bound positively charged molecular beams, although with very low intensity. We inject 235 keV C 6 − molecules into the charge of exchange canal (argon) of our tandem accelerator and detected the survival fraction of C2,3,4 molecules in 1+ and 2+ charge states or above. Our results showed that some molecules remain bound, with one or more electrons missing, after being forced through a low density gas stripper at relatively high energy. In the production process of negative molecular fluxes in the Source of Negative Ions by Cesium Sputtering (SNICS) we found an odd-even effect in their intensity that we understand as the coupling between the fragment size distribution of a dynamic fragmentation of graphite by cesium impact and the electron affinity of the molecules with n-carbon atoms. The availability of these kind of high energy molecular beams opens the door for discovery both in the study of the physics of negative and positive molecular ions.

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“…Meteoric 10 Be has been widely applied to different problems in recent decades. The study in rainwater [3][4][5][6] , surface sediments [7][8][9] , ice cores [10][11] and particulate matter [12][13][14][15][16] provides important information related to production and distribution in the atmosphere. It is also used to study atmospheric mixing, stratospheretroposphere, as well as exchange and seasonal variations, which can provide the transport time from production to surface deposition of this radioisotope.…”

Section: Introductionmentioning

confidence: 99%

Optimization of BeO formation parameters for the measurement of ¹⁰Be by AMS.

Romero,

Ramírez-Martínez,

Méndez-García

et al. 2023

J. Phys.: Conf. Ser.

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10Be has been widely studied over the last few years. The sensitivity offered by the Accelerator Mass Spectrometry technique (AMS) expands the efficient detection of 10Be by 4-5 orders of magnitude. The chemical species most used in the measurement of 10Be by AMS is beryllium oxide (BeO), which has been shown to offer the best conditions for measurements. In this work, several parameters in the BeO formation have been analyzed. The results show the efficiency of the protocol used but suggest that using Ag instead of Nb as a conductor could improve the measurement conditions.

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Meteoric 10Be concentrations in the center of Mexico

Cited by 7 publications

References 23 publications

Preliminary Measurements of Be-10/Be-7 Ratio in Rainwater for Atmospheric Transport Analysis

Preliminary Measurements of Be-10/Be-7 Ratio in Rainwater for Atmospheric Transport Analysis

Monoisotopic targets production from atomic and molecular positive ion implantation in a tandem accelerator at low energies

Optimization of BeO formation parameters for the measurement of ¹⁰Be by AMS.

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Meteoric 10Be concentrations in the center of Mexico

Cited by 7 publications

References 23 publications

Preliminary Measurements of Be-10/Be-7 Ratio in Rainwater for Atmospheric Transport Analysis

Preliminary Measurements of Be-10/Be-7 Ratio in Rainwater for Atmospheric Transport Analysis

Monoisotopic targets production from atomic and molecular positive ion implantation in a tandem accelerator at low energies

Optimization of BeO formation parameters for the measurement of 10Be by AMS.

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Optimization of BeO formation parameters for the measurement of ¹⁰Be by AMS.