Ion Microprobe Confirmation of Pb Isotope Ratios and Search for Isomer Precursors in Polonium Radiohaloes

Theodicic creationism: its membership and motivations

“…They publish in, and review papers for standard professional journals. Some even have rather impressive publication records and CV's that are very much worth envying; the work of geophysicist John Baumgarder, for example, is known and respected internationally (Chandler 1997), and physicist Robert Gentry is the principal author of 12 papers in Science and Nature (plus numerous other publications) (Gentry 1967(Gentry , 1968(Gentry , 1970(Gentry , 1971(Gentry , 1974(Gentry , 1978a(Gentry , b, 1992Gentry et al 1973Gentry et al , 1974Gentry et al , 1976Gentry et al , 1982.…”

Radioactive halos as possible indicators for geochemical processes in magmatites.

“…Because of the slow magmatic cooling rates of polonium-halo-bearing rocks such as granites, however, this hypothesis is untenable. The contrariety to the geological evidence could be overcome with long half-life isomers of polo nium of 0-decaying precursors as discussed by GENTRY et al (1973).…”

“…However, the ion-micro probe search for the isomers which should still exist in measurable quantities brought no posi tive results up to now (GENTRY, 1974;GENTRY et al 1973 so that this hypothesis has been abandoned (GENTRY, 1974).…”

“…in rock-forming minerals as discussed above for biotites (LEONOVA and TAUSON, 1958). 5. By ion microprobe mass spectroscopic studies of polonium halo inclusions, GENTRY (1974), GENTRY et al (1973) and MOAZED et al (1973 yielded results exhibiting anomalously high 206Pb/207Pb isotope ratios which are not consistent with the Pb isotopic ratios in U and/or Th halos. Since these Pb isotopic ratios can be considered as a consequence of the decay of polonium isotopes, such as 218Po, to 206Pb an obvious evidence for the different kind of Po and U and/or Th halos is given.…”

“…In addition to halos which cannot be as sociated with known naturally occurring alpha emitters the existence of a special group of radiohalos, the so-called polonium halos, have been discussed since the 30 s (HENDERSON and SPARKS, 1939;HENDERSON, 1939;GENTRY, 1968GENTRY, , 1974GENTRY et al, 1973;GENTRY et al, 1974). In spite of the possibility of coordinating ring sizes with well-known alpha emitting polonium isotopes there are serious difficulties in a con vincing explanation of these halos.…”