Abstract
It has recently been shown that in the stepwise excitation and ionization of an element with broad bandwidth lasers, there are major effects due to the fact that even and odd isotopes have different hyperfine structures. The increase in the number of levels and the decrease in the dipole matrix elements of the individual transitions leads to easily observable differences in ionization probabilities for isotopes with different nuclear spins. Here we describe two methods for eliminating biases due to hyperfine structure on the measurement of isotope ratios using broad bandwidth resonance ionization mass spectroscopy (RIMS).
Original language | English |
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Pages (from-to) | 1439-1457 |
Number of pages | 19 |
Journal | Spectrochimica Acta - Part B Atomic Spectroscopy |
Volume | 46 |
Issue number | 11 |
DOIs | |
State | Published - 1991 |