Xenology: The enigma of xenon in carbonaceous chondrites.

Isotopic anomalies in the early solar system.

“…The initial ratio of 26A1 to 27A1 can be cal XENON ISOTOPE ANOMALIES According to KURODA (1971KURODA ( , 1975KURODA ( , 1976KURODA ( , 1979 and KURODA et al (1974KURODA et al ( , 1975, the difference in the isotopic compositions of xenon in the atmosphere and the carbonaceous chon drites can be attributed to a combined effect of (a) mass fractionation, (b) neutron caputre and (c) cosmic-ray irradiation processes which took place in the early solar system. The amount of cosmic-ray-produced 126Xe in car bonaceous chondrites can be calculated from the equations …”

Anomalous xenon isotopes in the Antarctic carbonaceous chondrite Belgica.

“…It is per haps important to note here that Kuroda et al (1974Kuroda et al ( , 1975, Kuroda (1976a) and Saebo and Kuroda (1986a, b) …”

“…It is to be noted that Kuroda (1976a) gave an equation in the form iQ = (V + A i) {i+(1361) p } (2) where 1V is the AVCC xenon and Ai = Ci + ni. Saebo and Kuroda (1986a, b) replaced 1Q and 'C with iN and si, respectively, and wrote:…”

A general solution for the puzzle of the xenon.

“…As pointed out by KURODA (1976), the values of µ, µ', A i and z can be calculated from the values of V', T' and A' on the assumption that A 134 and z+134 are zero, as shown in Table 1. It is also possible to obtain an expression for X'.…”

“…KURODA et al (1974), on the other hand, have reported that the isotopic composition of the xenon in carbonaceous chondrites can be explained as due to the alterations of the isotopic compositions by a combined effect of a) mass fractionation, b) neutron-capture and c) cosmic-ray. irradiation processes which took place during the early history of the solar system (see also KURODA, 1976).…”