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thermonuclear reactions

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Series: Geological Society, London, Special Publications
Published: 01 January 2004
DOI: 10.1144/GSL.SP.2004.236.01.10
EISBN: 9781862394841
... to detect overproduction of heat early enough to prevent reaction of hot metallic uranium and graphite with air. The following combustion of the reactor caused release of 5×10 13 Bq of 137 Cs ( Clarke 1974 ), that is, a quantity that is about four orders of magnitude less than the amount released during...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.189.01.12
EISBN: 9781862394377
.... This was initially determined by counting ( Loosli & Oeschger 1969 ), and recently confirmed by cyclotron measurements ( Collon et al. 1999 ), to be c . 1.3 × 10 −6 Bq cm −3 Kr. It can be assumed that thermonuclear production in the atmosphere has been negligible and also that subsurface production does...
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Journal Article
Published: 01 January 2008
Reviews in Mineralogy and Geochemistry (2008) 68 (1): 31-53.
... degenerate conditions but, given the higher temperature sensitivity of carbon-burning reactions compared to those of the CNO bi-cycle relevant for novae, this burning is much more violent. The result is the complete thermonuclear disruption of the white dwarf in what is most likely a Type Ia supernova...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 50 (1): 77-120.
... rise to a small equilibrium concentration of 8 Be. The small amount of 8 Be produced by this reaction can then capture an additional 4 He to produce 12 C: Be formation and destruction in stars is complex and a number of additional chains of thermonuclear reactions have been proposed by Gamow...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 47 (1): 481-538.
..., fissiogenic (Fig. 1 ). We show how production ratios are affected not only by the source region radioelement concentration, but in the case of nucleogenic reactions, also by the spatial distribution and concentration of the target elements. For completeness we consider cosmogenic noble gas production rates...
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Series: AAPG Memoir
Published: 01 January 2013
DOI: 10.1306/13361575M1013542
EISBN: 9781629810027
... and confining a nuclear fusion reaction and finding accompanying engineering solutions, no funding could be expected for a lunar helium-3 mining operation and the related needed space technology. A workshop on research needs for magnetic fusion ( U.S. Department of Energy, Office of Fusion Energy Sciences...
Journal Article
Published: 01 November 2007
Quarterly Journal of Engineering Geology and Hydrogeology (2007) 40 (4): 335-352.
... attenuation reactions up-gradient, or simply there has not yet been sufficient travel time for nitrate pollution to arrive at these localities. The distribution of DOC concentrations from Environment Agency national datasets is plotted in Figure 6 with mean DOC data for selected aquifers tabulated...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP395.15
EISBN: 9781862396715
... at various locations on and above the Earth’s surface. These tests released radioactive debris into the local, regional and global environment. The larger thermonuclear tests commencing after 1950 injected most of their debris into the stratosphere where it was dispersed and deposited as fallout over...
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Journal Article
Published: 01 August 2010
Vadose Zone Journal (2010) 9 (3): 787-793.
... of infiltration and recharge through sand dunes in arid zones with special reference to stable isotopes and thermonuclear tritium . J. Hydrol . 23 : 79 – 109 . Edmunds , W.M. , P.E.R. Lovelock , and D.A. Gray . 1973 . Interstitial water chemistry and aquifer properties in the Upper...
FIGURES
Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.189.01.08
EISBN: 9781862394377
... permeable features. Saline water and its variable mixing with fresh groundwater in the deep aquifer produced additional hydrochemical changes, mainly derived from cation exchange and redox reactions. The resulting and most significant changes are local hardening (where marine encroachment is recent...
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Journal Article
Published: 01 February 2011
Quarterly Journal of Engineering Geology and Hydrogeology (2011) 44 (1): 93-108.
... presented by Lawrence & Foster (1986) is that pore water nitrate concentrations were generally low for those boreholes in the confined section of the aquifer; although the presence of thermonuclear tritium demonstrated that modern (post-1963) fissure water had diffused into the limestone matrix. Thus...
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Journal Article
Published: 01 November 2012
Vadose Zone Journal (2012) 11 (4): vzj2011.0133.
... tracer produced mainly in the upper atmosphere by the bombardment of Ar by cosmic radiation. In addition, global fallout from thermonuclear tests, conducted primarily in the Pacific Proving Grounds, resulted in a 36 Cl bomb pulse with extremely high meteoric ratios. Subsurface fluid samples with high...
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Journal Article
Published: 01 September 2001
Journal of Sedimentary Research (2001) 71 (5): 778-789.
... be established: where x, y, and z are contributions from soil CO 2 , dissolved aragonite, and atmospheric CO 2 , respectively. Furthermore, the carbonate dissolution and reprecipitation reaction: indicates that half of the carbon in the freshwater is from dissolved aragonite, the other half is from...
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Series: AAPG Memoir
Published: 01 January 2013
DOI: 10.1306/133615686M1013541
EISBN: 9781629810027
... controlled thermonuclear fusion as a possible source of electrical power. Schmitt (2006) has summarized the various generations of fusion research. Research efforts have focused almost entirely on fusion of deuterium (D) and tritium (T). Both of these materials are heavy isotopes of hydrogen—D, being...
Journal Article
Published: 01 January 2017
Reviews in Mineralogy and Geochemistry (2017) 82 (1): 289-344.
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Journal Article
Published: 01 January 2004
Reviews in Mineralogy and Geochemistry (2004) 55 (1): 153-195.
... of the fluid were taken throughout the experiment, and showed initial rapid influx of isotopically heavy-enriched Li released by early-dissolving alteration minerals. However, with progressive reaction, isotopic composition of the fluid decreased and Li concentration reached apparent steady state. Although...
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Journal Article
Published: 01 November 2007
Quarterly Journal of Engineering Geology and Hydrogeology (2007) 40 (4): 417-434.
... advection, dispersion and chemical reactions (e.g. denitrification approximated by first-order irreversible decay) of contaminants in groundwater and, in addition, allows simulation of dual-domain mass transfer in fractured media or extremely heterogeneous porous media. Dual-domain mass transfer...
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Series: Geological Society, London, Special Publications
Published: 01 January 2001
DOI: 10.1144/GSL.SP.2001.189.01.16
EISBN: 9781862394377
.... 1982 ). The geochemistry of pristine groundwaters are, by definition, controlled only by natural processes and developed primarily from precipitation and geochemical reactions between minerals and organic matter in soils and rocks. The chemical and isotopic composition of such waters define...
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Journal Article
Published: 10 December 2008
Canadian Journal of Earth Sciences (2008) 45 (11): 1207-1219.
... sediment sample, respectively. A few 137 Cs measurements were performed as a means to document the distribution in the sediment of the post-1950 A.D. thermonuclear signal ( Table 4 ). 137 Cs activity is observed down to 1 cm in cores ( Fig. 2A ) and down to 4 cm in core MC-22 ( Fig. 2B...
FIGURES
Series: AAPG Memoir
Published: 01 January 2013
DOI: 10.1306/13361569M1013548
EISBN: 9781629810027
..., including the Hubble and even the International Space Station ( Rincon, 2009 ). Figure 5. Cartoon of space debris in orbit. Photograph courtesy of the National Aeronautics and Space Administration. Chemical reactions using hydrogen, oxygen, or fluorine can achieve...