Laser EXAFS

Details Laser EXAFS Laser EXAFS

1979-12-20

1982-03-02

Anderson, Bruce C.

Radiant energy

Coded record and readers; invisible radiant energy type

250272, 250493, G01N 2320

Patent

active

043179940

ABSTRACT:
Apparatus (10) for obtaining EXAFS data of a material (11). A lens (12) directs a pulse of radiant energy (13) from a laser (14) onto a metal target (15) to produce X-rays (16) of a selected spectrum and intensity at the target (15). A baffle (17) directs X-rays (16) from the target (15) onto a spectral dispersive monochromator (18) which directs the spectrally resolved X-rays (16R) therefrom onto a photographic film 20. A film of material (11) is located in the path (22) of only a portion (16L) of the X-rays (16) throughout a selected spectral band, and the resolved X-rays (16R) directed onto the photographic film (20) form two separate images thereon comprising a reference spectrum (26R) representative of a portion of the X-rays (16U) throughout the selected band that was not affected by the film of material (11) and an absorption spectrum (26A) representative of a portion of the X-rays (16L) throughout the selected band that was modified by transmission through the film of material (11). The laser pulse (13) typically has a width of less than about 10 nanoseconds, and the material (11) may be in a highly transient state.

REFERENCES:
patent: 2835820 (1958-05-01), Birks
patent: 2842670 (1958-07-01), Birks
patent: 4058486 (1977-11-01), Mallozzi et al.
patent: 4134012 (1979-01-01), Smallbone et al.
patent: 4206364 (1980-06-01), Dixon et al.

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