Intense Vacuum Ultraviolet Atomic Line Sources

Douglas Davis; Walter Braun

doi:10.1364/AO.7.002071

Applied Optics
Vol. 7,
Issue 10,
pp. 2071-2074
(1968)
•https://doi.org/10.1364/AO.7.002071

Intense Vacuum Ultraviolet Atomic Line Sources

Douglas Davis and Walter Braun

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Douglas Davis and Walter Braun, "Intense Vacuum Ultraviolet Atomic Line Sources," Appl. Opt. 7, 2071-2074 (1968)

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Abstract

Intense atomic lines (O, N, S, C, Br, Cl, H, Se, Kr) have been produced by microwave excitation of mixtures of various gases in helium under flow conditions. The intensities generally obtained are greater than 10¹⁴ quanta/sec and are suitable for atomic emission studies and as photochemical light sources in the vacuum uv. Conditions for producing these high purity line sources are discussed.

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Atomic specie	Gas mixture	Emission line (Å)	Transition	Relative intensity	Absolute intensity × 10⁻¹⁶
H	2% Ho in He	1215.7	(2p)²P_1/2 → (1s)²S_1/2		^a0.76
Xe	3% Xe in He	1469.6	(5p⁵6s)²P_3/2 → (5p⁶)¹S₀		^a1.00
Kr	3% Kr in He	1235.8	(4p⁵5s)²P_3/2 → (4p⁶)¹S₀	1.00	^a1.20
		1164.9	P_1/2 → S₀	0.20	^a1.20
O	10% O₂ in He	1302.2	(2p³3s)³S₁⁰ → (2p⁴)³P₂	0.61	^a0.20
		1304.9	³S₁⁰ → ³P₁	0.97
		1306.0	³S₁⁰ → ³P₀	1.00
N	1% N₂ in He	1745.2	(2p²3s)²P → (2p³)²P⁰	0.78	^b1.40
		1742.7	(2p²3s)²P → (2p³)²P⁰	1.00	^b1.40
		1494.7	²P → ²D⁰	0.15	^a0.35
		1492.6	²P → ²D⁰	0.30	^a0.35
		1411.9	²D → ²P⁰	0.06
Cl	0.1% Cl₂ in He	1396.5	(3p⁴4s)⁴P_3/2 → (3p⁵)²P⁰_1/2	0.35	^a1.04
		1389.9	⁴P_1/2 → ²P⁰_1/2	1.00
		1379.6	⁴P_3/2 → ²P⁰_3/2	0.13
		1363.5	²P_3/2 → ²P⁰_1/2	0.17
		1351.7	²P_1/2 → ²P⁰_1/2	0.05
		1347.3	²P_3/2 → ²P⁰_3/2	0.03
Br	0.1% Br₂ in He	1633.6	(4p⁴5s)⁴P_3/2 → (4p⁵)²P⁰_1/2	1.00	^b1.20
		1582.4	⁴P_1/2 → ²P⁰_1/2	0.50
		1576.5	⁴P_5/2 → ²P⁰_3/2	0.92
		1540.8	⁴P_3/2 → ²P⁰_3/2	0.25
		1575.0	²P_3/2 → ²P⁰_3/2	0.46
		1531.9	²P_1/2 → ²P⁰_1/2	0.17
		1488.6	²P_3/2 → ²P⁰_1/2	0.15
		1449.9	²P_1/2 → ²P⁰_3/2	0.03
		1384.6	⁴P_1/2 → ²P⁰_1/2	0.01
C	1% CH₂ in He	1930.9	(2s²2p³s)¹P⁰₁ → (2s²2p²)¹D²	1.00	^b0.98
		1658.1	³P⁰ → ³P
		1657.0		0.52
		1656.3
		1560.3	³D⁰ → ³P
		1560.7		0.58
		1561.4
S	0.2% H₂S + He	1914.9	(3p³4s)⁵S⁰₂ → (3p⁴)³P₁	0.16
		1900.3	⁵S⁰₂ → ³P₂	0.52
		1826.3	³S⁰₁ → ³P₀	1.00	^b0.50
		1820.4	³S⁰₁ → ³P₁	0.64
		1807.3	³S⁰₁ → ³P₂	0.18
		1667	¹D⁰₂ → ¹D₂	0.13

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Applied Optics