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Possible generation of heat from nuclear fusion in Earth ’ s inner core

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ABSTRACT

The cause and source of the heat released from Earth’s interior have not yet been determined. Some research groups have proposed that the heat is supplied by radioactive decay or by a nuclear georeactor. Here we postulate that the generation of heat is the result of three-body nuclear fusion of deuterons confined in hexagonal FeDx core-centre crystals; the reaction rate is enhanced by the combined attraction effects of high-pressure (~364 GPa) and high-temperature (~5700 K) and by the physical catalysis of neutral pions: 2D + 2D + 2D → 21H + 4He + 2  + 20.85 MeV. The possible heat generation rate can be calculated as 8.12 × 1012 J/m3, based on the assumption that Earth’s primitive heat supply has already been exhausted. The H and He atoms produced and the anti-neutrino are incorporated as Fe-H based alloys in the H-rich portion of inner core, are released from Earth’s interior to the universe, and pass through Earth, respectively.

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Earth’s cross-section showing the crust, upper- and lower-mantle, and outer- and inner-cores.The inner core comprises an H-rich core and a D-rich core. A substantial amount of heat is generated by nuclear dynamic fusion of deuterons squeezed in highly compressed hexagonal close-packed (hcp) Fe-rich crystal lattice near the inner core centre. The H and He atoms and the anti-neutrino  that are produced are incorporated as Fe-H based alloys in the H-rich inner core, are released from Earth’s interior to the universe, and pass through Earth, respectively.
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f2: Earth’s cross-section showing the crust, upper- and lower-mantle, and outer- and inner-cores.The inner core comprises an H-rich core and a D-rich core. A substantial amount of heat is generated by nuclear dynamic fusion of deuterons squeezed in highly compressed hexagonal close-packed (hcp) Fe-rich crystal lattice near the inner core centre. The H and He atoms and the anti-neutrino that are produced are incorporated as Fe-H based alloys in the H-rich inner core, are released from Earth’s interior to the universe, and pass through Earth, respectively.

Mentions: On the other hand, because the incorporated gross weight of D from the creation of Earth’s core to present time is estimated as 6.67 × 1021 kg (=100 Mkm3 × 2 Mg/m3 × 4/20 × 1/0.006), the volume of Fe-D crystals up through the present is 4.99 × 1017 m3 (6.67 × 1021/13.36 [Mg/m3]), resulting in an unreacted (Fe-D) crystal volume of 4.37 × 1017 m3 (=4.99 × 1017–6.23 × 1016). Thus we can estimate 471 km (0.08 vol.% of inner core) as the radius of the D-rich inner core in Fig. 2. The heat generated is transported from the inner to the outer core and then produces mantle flow passing through the core-mantle transition zone. However, it is not clear how the heat from the inner core can reach the mantle because of its elastic anisotropy46 and its spatially variable heat loss47. Furthermore, whether the thermal circulation of the mantle has a whole-mantle or a layered-mantle configuration remains to be resolved47. The volatile and non-active He gases could be discharged by hydrothermal and volcanic activities and then released from Earth’s atmosphere to the universe. Simultaneously, H gasses could be incorporated as Fe-H alloys, increasing the H-rich inner core. Furthermore, because Mercury, Mars, and Earth’s moon do not have inner cores with high pressures ~364 GPa and Venus does not have enough H13 or D, these terrestrial planets do not support nuclear fusion, resulting in no evidence of plate tectonics.


Possible generation of heat from nuclear fusion in Earth ’ s inner core
Earth’s cross-section showing the crust, upper- and lower-mantle, and outer- and inner-cores.The inner core comprises an H-rich core and a D-rich core. A substantial amount of heat is generated by nuclear dynamic fusion of deuterons squeezed in highly compressed hexagonal close-packed (hcp) Fe-rich crystal lattice near the inner core centre. The H and He atoms and the anti-neutrino  that are produced are incorporated as Fe-H based alloys in the H-rich inner core, are released from Earth’s interior to the universe, and pass through Earth, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5120317&req=5

f2: Earth’s cross-section showing the crust, upper- and lower-mantle, and outer- and inner-cores.The inner core comprises an H-rich core and a D-rich core. A substantial amount of heat is generated by nuclear dynamic fusion of deuterons squeezed in highly compressed hexagonal close-packed (hcp) Fe-rich crystal lattice near the inner core centre. The H and He atoms and the anti-neutrino that are produced are incorporated as Fe-H based alloys in the H-rich inner core, are released from Earth’s interior to the universe, and pass through Earth, respectively.
Mentions: On the other hand, because the incorporated gross weight of D from the creation of Earth’s core to present time is estimated as 6.67 × 1021 kg (=100 Mkm3 × 2 Mg/m3 × 4/20 × 1/0.006), the volume of Fe-D crystals up through the present is 4.99 × 1017 m3 (6.67 × 1021/13.36 [Mg/m3]), resulting in an unreacted (Fe-D) crystal volume of 4.37 × 1017 m3 (=4.99 × 1017–6.23 × 1016). Thus we can estimate 471 km (0.08 vol.% of inner core) as the radius of the D-rich inner core in Fig. 2. The heat generated is transported from the inner to the outer core and then produces mantle flow passing through the core-mantle transition zone. However, it is not clear how the heat from the inner core can reach the mantle because of its elastic anisotropy46 and its spatially variable heat loss47. Furthermore, whether the thermal circulation of the mantle has a whole-mantle or a layered-mantle configuration remains to be resolved47. The volatile and non-active He gases could be discharged by hydrothermal and volcanic activities and then released from Earth’s atmosphere to the universe. Simultaneously, H gasses could be incorporated as Fe-H alloys, increasing the H-rich inner core. Furthermore, because Mercury, Mars, and Earth’s moon do not have inner cores with high pressures ~364 GPa and Venus does not have enough H13 or D, these terrestrial planets do not support nuclear fusion, resulting in no evidence of plate tectonics.

View Article: PubMed Central - PubMed

ABSTRACT

The cause and source of the heat released from Earth’s interior have not yet been determined. Some research groups have proposed that the heat is supplied by radioactive decay or by a nuclear georeactor. Here we postulate that the generation of heat is the result of three-body nuclear fusion of deuterons confined in hexagonal FeDx core-centre crystals; the reaction rate is enhanced by the combined attraction effects of high-pressure (~364 GPa) and high-temperature (~5700 K) and by the physical catalysis of neutral pions: 2D + 2D + 2D → 21H + 4He + 2  + 20.85 MeV. The possible heat generation rate can be calculated as 8.12 × 1012 J/m3, based on the assumption that Earth’s primitive heat supply has already been exhausted. The H and He atoms produced and the anti-neutrino are incorporated as Fe-H based alloys in the H-rich portion of inner core, are released from Earth’s interior to the universe, and pass through Earth, respectively.

No MeSH data available.


Related in: MedlinePlus