Zobrazeno 1 - 10
of 55
pro vyhledávání: '"L. H. Ahrens"'
Autor:
L. H. Ahrens
Publikováno v:
GEOCHEMICAL JOURNAL. 10:51-58
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::333743dc1e60c8b0afa92280b0226993
https://doi.org/10.2343/geochemj.10.51
https://doi.org/10.2343/geochemj.10.51
Autor:
L. H. Ahrens, A. B. Simpson
Publikováno v:
Meteoritics. 14:215-232
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f86a7e9b3cb2927c157be9624c6f54b2
https://doi.org/10.1111/j.1945-5100.1979.tb00496.x
https://doi.org/10.1111/j.1945-5100.1979.tb00496.x
Autor:
A. B. Simpson, L. H. Ahrens
Publikováno v:
International Astronomical Union Colloquium. 39:445-450
Analyses of eleven major elements in five howardite samples and in the silicate fraction of seven mesosiderites are presented in a recalculated form and compared. The mesosiderite silicate fractions show distinct differences in chemical composition f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9adc3907bfbbb83deba01cbcbabb9916
https://doi.org/10.1017/s0252921100070391
https://doi.org/10.1017/s0252921100070391
Autor:
L. H. Ahrens
Publikováno v:
Mineralogical Magazine and Journal of the Mineralogical Society. 28:277-295
The important influence that the radioactive decay of the radio-elements uranium and thorium has had on the geochemical distribution of lead is now well appreciated, but little is known about the possible geochemical implications of the radioactivity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::595710235bcbe32fc9afbe82c583e203
https://doi.org/10.1180/minmag.1948.028.200.04
https://doi.org/10.1180/minmag.1948.028.200.04
Autor:
L. H. Ahrens
Publikováno v:
American Journal of Science. 248:142-145
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13ada8860381b4b2911036038612efa3
https://doi.org/10.2475/ajs.248.2.142
https://doi.org/10.2475/ajs.248.2.142
Autor:
L. H. Ahrens
Publikováno v:
Geochimica et Cosmochimica Acta. 27:929-938
The statistical nature of five distributions has been examined: 1. (i) SiO 2 in granitic rocks of Japan. 2. (ii) K in K-feldspar from pre-Cambrian basement granites and gneisses of Southern Norway. 3. (iii) K in K-feldspar from pre-Cambrian pegmatite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b5884df96f4ac9b922dc83a38a42672
https://doi.org/10.1016/0016-7037(63)90102-9
https://doi.org/10.1016/0016-7037(63)90102-9
Autor:
L. H. Ahrens
Publikováno v:
Mineralogical Magazine and Journal of the Mineralogical Society. 30:467-470
A Granite (G-1) from Westerley, Rhode Island, and a diabase (W-1) from Centerville, Virginia, were recently analysed by some 34 analysts in different countries for the purpose of obtaining thoroughly reliable rock standards for spectrochemical analys
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0821ffd90dc0c4e52e5fdcf7bf1f1491
https://doi.org/10.1180/minmag.1954.030.226.06
https://doi.org/10.1180/minmag.1954.030.226.06
Autor:
L. H. Ahrens
Publikováno v:
Transactions of the Royal Society of South Africa. 36:163-178
An examination of several types of evidence (systematics of stable isotopes, relative abundances of isotopes, energies of excited states, neutron and proton separation energies, mass excess and binding energy, and the half-lives of long-lived heavy a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a2362354fdd0035195b09d1156d0d7b
https://doi.org/10.1080/00359196109519046
https://doi.org/10.1080/00359196109519046
Autor:
L. H. Ahrens, Robley D. Evans
Publikováno v:
Physical Review. 74:279-286
New measurements of the rate of emission of gamma-ray energy by ${\mathrm{K}}^{40}$ give 4.9\ifmmode\pm\else\textpm\fi{}0.1 Mev/sec. g K, in agreement with Gleditsch and Gr\'af. Thus the minimum value of the probability of electron capture in ${\math
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cffd846ede8eb16546cd42b604efdccc
https://doi.org/10.1103/physrev.74.279
https://doi.org/10.1103/physrev.74.279
Publikováno v:
Applied Spectroscopy. 18:84-87
Quantitative dc arc techniques are described for estimating thallium in two distinctly different types of geological material, granitic rocks and manganese nodules. Thallium is not normally detectable in granite with average concentration of about on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bdc34353f3d60821377b6fe5159f003a
https://doi.org/10.1366/000370264789620583
https://doi.org/10.1366/000370264789620583