High steady-state column density of I(2P3/2) atoms from I2 photodissociation at 532 nm: Towards parity non-conservation measurements
Abstract Steady-state column densities of 10 17 cm −2 of I( 2 P 3/2 ) atoms are produced from photodissociation of I 2 vapour at 290.5 K using 5 W of 532 nm laser light. Recombination of the I( 2 P 3/2 ) atoms at the cell walls is minimized by coating the cell surface with a hydrophobic silane (dim...
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Published in | Scientific reports Vol. 6; no. 1; p. 33261 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group
15.09.2016
|
Subjects | |
Online Access | Get full text |
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Summary: | Abstract
Steady-state column densities of 10
17
cm
−2
of I(
2
P
3/2
) atoms are produced from photodissociation of I
2
vapour at 290.5 K using 5 W of 532 nm laser light. Recombination of the I(
2
P
3/2
) atoms at the cell walls is minimized by coating the cell surface with a hydrophobic silane (dimethyldichlorosilane/DMDCS). Operation at room temperature, and at an I
2
vapour pressure of ~0.2 mbar, without using a buffer gas, allows relatively low Lorentz and Doppler widths of ~2
π
× 1.5 (FWHM) and ~2
π
× 150 (HW at 1/
e
2
) Mrad/s, respectively, at the "Equation missing"
M1 transition of atomic iodine at 1315 nm. These high column densities and low linewidths are favorable for parity nonconservation optical rotation measurements near this M1 transition. Furthermore, as the cell is completely sealed, this method of production of high-density
127
I(
2
P
3/2
) atoms is also compatible with using iodine radioisotopes, such as for the production of high-density
129
I(
2
P
3/2
). |
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ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/srep33261 |