Spallation, cosmic rays, meteorites, and planetology

David, Jean‐Christophe; Leya, I.

doi:10.1016/j.ppnp.2019.103711

Cited by 16 publications

(8 citation statements)

References 301 publications

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“…We could also suggest that in INCL the ratio of the number of protons emitted to the number of neutrons emitted is too low, thus, leading to an overestimation of the neutron-poor residues. But, the calculated particle spectra seem here again to show that INCL simulates them fairly well [42]. However, this observed overestimation occurs for events with low cross sections, i.e., events that are very sensitive to certain quantities, such as the ones mentioned previously.…”

Section: Resultssupporting

confidence: 50%

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Experiment-based determination of the excitation function for the production of Ti44 in proton-irradiated vanadium samples

et al. 2021

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In this paper, the excitation function utilizing the nuclear reaction nat V(p,X) 44 Ti was determined. The seven investigated metallic vanadium disks were proton irradiated within an energy range of 111-954 MeV between 1995 to 1996. The experiments' cross sections were validated using two independent measurements by combining γ spectrometry with both a low-energy germanium detector and a high-purity germanium detector. The maximum cross section was observed for energies of 145 ± 1.2 and 150.2 ± 1.2 MeV with values of 803 ± 28 and 805 ± 27 μb, respectively. In this regard, it was demonstrated that our data were in good agreement with the former, however, unpublished results which were investigated over a similar energy range. Thus, combined with these earlier measurements, a consistent data set for the nat V(p,X) 44 Ti excitation function from 111 to 1350 MeV is provided. Model calculations using Liège Intranuclear Cascade (INCL)/ABLA reproduce the shape of the excitation function correctly but overpredict the absolute values by factors of 2 to 3. Some considerations regarding this already earlier observed systematic overestimation of neutron-poor residues are given. The results will trigger new approaches in code development in order to improve the predictions.

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Section: Resultssupporting

confidence: 50%

“…A second point concerns the 52 Fe excitation function of 59 Co(p,X) reactions, provided by various sources ( [36][37][38][39][40][41][42]). Again, the mechanisms to obtain 52 Fe from cobalt through proton-induced spallation are analogous to the production of 44 Ti from vanadium.…”

Section: Resultsmentioning

confidence: 99%

Experiment-based determination of the excitation function for the production of Ti44 in proton-irradiated vanadium samples

et al. 2021

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“…The collision between projectile (baryons, light particles, or ions) and target (nuclei) is described by intranuclear cascade models; see, for instance, Refs. [59][60][61][62][63][64][65] and references therein. In this context, it is assumed that the reaction can be described as an avalanche of independent binary collisions.…”

Section: A Liège Intranuclear-cascade Codementioning

confidence: 99%

Hypernuclei formation in spallation reactions by coupling the Liège intranuclear cascade model to the deexcitation code ABLA

Rodríguez-Sànchez

David²,

Hirtz³

et al. 2022

Phys. Rev. C

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“…The so‐called 14 C‐ 10 Be terrestrial ages are less dependent on shielding and are therefore more reliable than ages determined using 14 C only (Jull, 2006). Beryllium‐10 is a long‐lived radionuclide with a half‐life of 1.387 ± 0.012 × 10 6 yr (Korschinek et al., 2010) that is predominantly produced by spallation reactions on O (e.g., David & Leya, 2019), that is, from the same target element as 14 C. Specific activity concentrations in bulk H, L, and LL ordinary chondrites are in the range of 20 and 22 dpm kg −1 , respectively (Nishiizumi, 1995; Nishiizumi et al., 1989). The very similar reaction pathways and the fact that both radionuclides are produced from the same target elements make the 14 C/ 10 Be production rate ratio almost independent of shielding (Jull, 2006).…”

Section: Introductionmentioning

confidence: 99%

Terrestrial ages of seven meteorite strewn fields and two single unpaired meteorites from the Sultanate of Oman determined using ¹⁴C and ¹⁰Be

Sliz

Hofmann

Leya

et al. 2022

Meteorit & Planetary Scien

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Through the investigation of terrestrial ages of meteorites from Oman, we aim to better understand the time scales of meteorite accumulation and erosion in Oman and the meteorite flux in the past. Here, we present 14C and 14C‐10Be terrestrial ages of seven ordinary chondrite strewn fields and two unpaired single meteorites from the Sultanate of Oman. After critical evaluation of multiple data for each strewn field, we propose “best estimate terrestrial ages,” typically based on 14C/10Be. For objects for which complex irradiation histories are known or suspected, terrestrial ages were calculated solely using 14C. The best estimate strewn field ages range from 8.1 ± 3.0 ka (SaU 001) to 35.2 ± 5.1 ka (Dho 005). Including two previously dated strewn fields, the mean and median age of nine Oman strewn fields is 15.9 ± 12.3 and 13.6 ka, respectively. The new data show a general good agreement with data previously obtained in a different laboratory, and we observe a similar general correlation between strewn field ages and mean weathering grade as in previous work based on individual meteorites. Weathering degree W4 is reached for dated samples after 20–35 ka. While the age statistics of strewn fields does not show the previously observed lack of young events, the low abundance of young (0–5 ka) individual meteorites as compared with older (~20 ka) meteorites is confirmed by our data and remains unexplained.

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Spallation, cosmic rays, meteorites, and planetology

Cited by 16 publications

References 301 publications

Experiment-based determination of the excitation function for the production of Ti44 in proton-irradiated vanadium samples

Experiment-based determination of the excitation function for the production of Ti44 in proton-irradiated vanadium samples

Hypernuclei formation in spallation reactions by coupling the Liège intranuclear cascade model to the deexcitation code ABLA

Terrestrial ages of seven meteorite strewn fields and two single unpaired meteorites from the Sultanate of Oman determined using ¹⁴C and ¹⁰Be

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Spallation, cosmic rays, meteorites, and planetology

Cited by 16 publications

References 301 publications

Experiment-based determination of the excitation function for the production of Ti44 in proton-irradiated vanadium samples

Experiment-based determination of the excitation function for the production of Ti44 in proton-irradiated vanadium samples

Hypernuclei formation in spallation reactions by coupling the Liège intranuclear cascade model to the deexcitation code ABLA

Terrestrial ages of seven meteorite strewn fields and two single unpaired meteorites from the Sultanate of Oman determined using 14C and 10Be

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Product

Resources

About

Terrestrial ages of seven meteorite strewn fields and two single unpaired meteorites from the Sultanate of Oman determined using ¹⁴C and ¹⁰Be