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Production of He-3 in rocks by reactions induced by particles of the nuclear-active and muon components of cosmic rays : Geological and petrological implications. / Nesterenok, A. V.; Yakubovich, O. V.
In: Petrology, Vol. 24, No. 1, 01.2016, p. 21-34.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Production of He-3 in rocks by reactions induced by particles of the nuclear-active and muon components of cosmic rays
T2 - Geological and petrological implications
AU - Nesterenok, A. V.
AU - Yakubovich, O. V.
PY - 2016/1
Y1 - 2016/1
N2 - The paper presents data on the production of the He-3 nuclide in rocks under the effect of cosmicray particles. The origin of the nuclide in the ground in neutronand proton-induced spallation reactions, reactions induced by high-energy muons, and negative muon capture reactions is analyzed. The cross sections of reactions producing He-3 and H-3 are calculated by means of numerical simulations with the GEANT4 simulation toolkit. The production rate of the He-3 nuclide in the ground is evaluated for the average level of solar activity at high geomagnetic latitudes and at sea level. It is proved that the production of He-3 in nearsurface ground layers by spallation reactions induced by cosmic-ray protons may be approximately 20% of the total production rate of cosmogenic He-3. At depths of 10-50 m.w.e., the accumulation of He-3 is significantly contributed by reactions induced by cosmic-ray muons. Data presented in the paper make it possible to calculate the accumulation rate of He-3 in a rock depending on depth that is necessary for the evaluation of the exposure time of the magmatic or metamorphic complex on the Earth's surface (He-3 dating).
AB - The paper presents data on the production of the He-3 nuclide in rocks under the effect of cosmicray particles. The origin of the nuclide in the ground in neutronand proton-induced spallation reactions, reactions induced by high-energy muons, and negative muon capture reactions is analyzed. The cross sections of reactions producing He-3 and H-3 are calculated by means of numerical simulations with the GEANT4 simulation toolkit. The production rate of the He-3 nuclide in the ground is evaluated for the average level of solar activity at high geomagnetic latitudes and at sea level. It is proved that the production of He-3 in nearsurface ground layers by spallation reactions induced by cosmic-ray protons may be approximately 20% of the total production rate of cosmogenic He-3. At depths of 10-50 m.w.e., the accumulation of He-3 is significantly contributed by reactions induced by cosmic-ray muons. Data presented in the paper make it possible to calculate the accumulation rate of He-3 in a rock depending on depth that is necessary for the evaluation of the exposure time of the magmatic or metamorphic complex on the Earth's surface (He-3 dating).
KW - NUCLIDE PRODUCTION-RATES
KW - PROTON-INDUCED REACTIONS
KW - SITU COSMOGENIC HE-3
KW - HOLOCENE LAVA FLOWS
KW - RADIOGENIC HELIUM
KW - NOBLE-GASES
KW - ISOTOPIC COMPOSITION
KW - TERRESTRIAL ROCKS
KW - CONTINENTAL-CRUST
KW - CROSS-SECTIONS
U2 - 10.1134/S0869591116010057
DO - 10.1134/S0869591116010057
M3 - статья
VL - 24
SP - 21
EP - 34
JO - Petrology
JF - Petrology
SN - 0869-5911
IS - 1
ER -
ID: 14719911