Cross sections from 5 to 35MeV for the reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl: Implications for early irradiation in the solar system

Gregory F. Herzog, Marc W. Caffee, Thomas Faestermann, R. Hertenberger, Gunther Korschinek, Ingo Leya, Robert C. Reedy, J. M. Sisterson

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Cross sections were measured for the nuclear reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl in the energy region from approximately 5-35MeV. The rates of these reactions are important for studies of early solar system irradiation scenarios. The 26Al, 36Cl, and 41Ca were separated chemically, and the numbers of atoms produced in each reaction channel were measured using accelerator mass spectrometry (AMS). From these results, 26 cross sections were determined and compared with predictions of the TALYS code. Agreement is within 40% for most cross sections. Our measurements were used to model the production of 7Be, 10Be, 26Al, and 41Ca in the early solar system. For projectiles 1H, 3He, and 4He, we assumed energy spectra of the general form E. For a wide range of parameterizations, the modeled ratios of 7Be/Be and 10Be/Be on the one hand and of 26Al/27Al and 41Ca/Ca on the other are coupled because the excitation functions for the relevant nuclear reactions have similar shapes. Modeling of a closed system with the constraint that 10Be/9Be=0.001 fails to reproduce simultaneously the range of 7Be/9Be, 26Al/27Al, and 41Ca/Ca ratios inferred for the early solar system from studies of meteorites.

Original languageEnglish (US)
Pages (from-to)1427-1446
Number of pages20
JournalMeteoritics and Planetary Science
Volume46
Issue number10
DOIs
StatePublished - Oct 1 2011

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solar system
irradiation
cross section
nuclear reactions
cross sections
meteorites
accelerator mass spectrometry
parameterization
meteorite
energy
projectiles
energy spectra
accelerators
mass spectroscopy
prediction
predictions
modeling
excitation
atoms
nuclear reaction

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Space and Planetary Science

Cite this

Herzog, Gregory F. ; Caffee, Marc W. ; Faestermann, Thomas ; Hertenberger, R. ; Korschinek, Gunther ; Leya, Ingo ; Reedy, Robert C. ; Sisterson, J. M. / Cross sections from 5 to 35MeV for the reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl : Implications for early irradiation in the solar system. In: Meteoritics and Planetary Science. 2011 ; Vol. 46, No. 10. pp. 1427-1446.
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abstract = "Cross sections were measured for the nuclear reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl in the energy region from approximately 5-35MeV. The rates of these reactions are important for studies of early solar system irradiation scenarios. The 26Al, 36Cl, and 41Ca were separated chemically, and the numbers of atoms produced in each reaction channel were measured using accelerator mass spectrometry (AMS). From these results, 26 cross sections were determined and compared with predictions of the TALYS code. Agreement is within 40{\%} for most cross sections. Our measurements were used to model the production of 7Be, 10Be, 26Al, and 41Ca in the early solar system. For projectiles 1H, 3He, and 4He, we assumed energy spectra of the general form E-α. For a wide range of parameterizations, the modeled ratios of 7Be/Be and 10Be/Be on the one hand and of 26Al/27Al and 41Ca/Ca on the other are coupled because the excitation functions for the relevant nuclear reactions have similar shapes. Modeling of a closed system with the constraint that 10Be/9Be=0.001 fails to reproduce simultaneously the range of 7Be/9Be, 26Al/27Al, and 41Ca/Ca ratios inferred for the early solar system from studies of meteorites.",
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Cross sections from 5 to 35MeV for the reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl : Implications for early irradiation in the solar system. / Herzog, Gregory F.; Caffee, Marc W.; Faestermann, Thomas; Hertenberger, R.; Korschinek, Gunther; Leya, Ingo; Reedy, Robert C.; Sisterson, J. M.

In: Meteoritics and Planetary Science, Vol. 46, No. 10, 01.10.2011, p. 1427-1446.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cross sections from 5 to 35MeV for the reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl

T2 - Implications for early irradiation in the solar system

AU - Herzog, Gregory F.

AU - Caffee, Marc W.

AU - Faestermann, Thomas

AU - Hertenberger, R.

AU - Korschinek, Gunther

AU - Leya, Ingo

AU - Reedy, Robert C.

AU - Sisterson, J. M.

PY - 2011/10/1

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N2 - Cross sections were measured for the nuclear reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl in the energy region from approximately 5-35MeV. The rates of these reactions are important for studies of early solar system irradiation scenarios. The 26Al, 36Cl, and 41Ca were separated chemically, and the numbers of atoms produced in each reaction channel were measured using accelerator mass spectrometry (AMS). From these results, 26 cross sections were determined and compared with predictions of the TALYS code. Agreement is within 40% for most cross sections. Our measurements were used to model the production of 7Be, 10Be, 26Al, and 41Ca in the early solar system. For projectiles 1H, 3He, and 4He, we assumed energy spectra of the general form E-α. For a wide range of parameterizations, the modeled ratios of 7Be/Be and 10Be/Be on the one hand and of 26Al/27Al and 41Ca/Ca on the other are coupled because the excitation functions for the relevant nuclear reactions have similar shapes. Modeling of a closed system with the constraint that 10Be/9Be=0.001 fails to reproduce simultaneously the range of 7Be/9Be, 26Al/27Al, and 41Ca/Ca ratios inferred for the early solar system from studies of meteorites.

AB - Cross sections were measured for the nuclear reactions natMg(3He,x)26Al, 27Al(3He,x)26Al, natCa(3He,x)41Ca, and natCa(3He,x)36Cl in the energy region from approximately 5-35MeV. The rates of these reactions are important for studies of early solar system irradiation scenarios. The 26Al, 36Cl, and 41Ca were separated chemically, and the numbers of atoms produced in each reaction channel were measured using accelerator mass spectrometry (AMS). From these results, 26 cross sections were determined and compared with predictions of the TALYS code. Agreement is within 40% for most cross sections. Our measurements were used to model the production of 7Be, 10Be, 26Al, and 41Ca in the early solar system. For projectiles 1H, 3He, and 4He, we assumed energy spectra of the general form E-α. For a wide range of parameterizations, the modeled ratios of 7Be/Be and 10Be/Be on the one hand and of 26Al/27Al and 41Ca/Ca on the other are coupled because the excitation functions for the relevant nuclear reactions have similar shapes. Modeling of a closed system with the constraint that 10Be/9Be=0.001 fails to reproduce simultaneously the range of 7Be/9Be, 26Al/27Al, and 41Ca/Ca ratios inferred for the early solar system from studies of meteorites.

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