Energy Levels and Mean Lives of Cl ii–Cl vii*

S. Bashkin; I. Martinson

doi:10.1364/JOSA.61.001686

Journal of the Optical Society of America
Vol. 61,
Issue 12,
pp. 1686-1692
(1971)
•https://doi.org/10.1364/JOSA.61.001686

Energy Levels and Mean Lives of Cl ii–Cl vii

S. Bashkin and I. Martinson

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S. Bashkin and I. Martinson, "Energy Levels and Mean Lives of Cl ii–Cl vii*," J. Opt. Soc. Am. 61, 1686-1692 (1971)

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Abstract

We have investigated the spectra of chlorine between 500 and 2800 Å using the beam–foil technique. Over 200 multiplets have been observed, many of which had not been reported earlier. A number of such transitions could be classified and several new term values are proposed for Cl iv, Cl v, Cl vi, and Cl vii. Mean lives of various excited levels were measured for Cl ii–Cl vii. The results are compared with theoretical calculations and other measurements in appropriate isoelectronic systems.

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Observed wavelength^a (Å)	Spectrum		Calculated wavelength (Å)	Energy (cm⁻¹) of upper term
532.7	Cl vii	4f–6g	533.1	771 664 ± 20^b
820.7		4f–5g	820.8	705 940 ± 75
943.8		5f–7g	944.1	811 337 ± 60
949.2		5g–7h	948.6	811 292 ± 130
1356.3 ± 1		5d–6f		771 341 ± 60
1509.2		5f–6g	1508.9
1521.0		5g–6h	1520.1	771 686 ± 100
1531.0 ± 1		6h–8i	1530.0	837 003 ± 150
2501.6		6f–7g	2501.0
2522.5		6g–7h	2520.7
		6h–7i	2522.8	811 329 ± 110
2212.2		$4 s {{}^{2}S}_{\frac{1}{2}} - 4 p {{}^{2}P}_{\frac{1}{2}} °$
1668.8		$4 p {{}^{2}P}_{\frac{1}{2}} ° - 4 d {{}^{2}D}_{\frac{3}{2}}$
1686.5		${{}^{2}P}_{\frac{3}{2}} ° - {{}^{2}D}_{\frac{5}{2}}$
1246.0	Cl vi	3s3p ¹P°–3p^{2 1}D^c		229 206 ± 40
1767.7		3s4p ³P₀°–3s4d ³D₁
1772.0		³P₁°–³D₂
1783.3		³P₂°–³D₃
2142.2		3s4s ³S₁–3s4p ³P₂°
2159.2		³S₁–³P₁°
2165.0		³S₁–³P₀°
914.5	Cl v	3s3p^{2 2}D–3p^{3 2}D°		295 229 ± 60
865.3	Cl iv	3s²3p^{2 1}D–3s3p^{3 1}D°^c		129 333 ± 70

Spectrum	Wavelength (Å)	Transition	Mean life of upper level (ns)			Cascade mean lives (ns)	Replenishment ratio

			This work		Theory
Cl vii	605	3p ²P°–3d ²D		0.18 ± 0.03^a	0.164^b	0.7 ± 0.2; 6 ± 3	0.25
	800	3s ²S–3p ²P°		0.54 ± 0.05	0.475^c	6 ± 2	0.04
	813			0.55 ±0.06			0.05
	949	5g–7h		1.10 ± 0.10		8 ± 2	0.08
	1509	5f–6g		0.85 ± 0.10		9 ± 3	0.20
	1521	5g–6h		1.0 ±0.2		18 ± 4	0.30
Cl vi	671	3s^{2 1}S–3s3p ¹P°		0.21 ±0.03	0.158^b	3 ± 1	0.26
	1246	3s3p ¹P°–3p^{2 1}D		2.7 ± 0.2		19 ± 3	0.09
	555	3s3p ³P°–3s3d ³D		0.22^d	0.123^b	0.8 ± 0.3; 10	0.40
Cl v	883	3s²3p ²P°–3s3p^{2 2}D		4.2 ± 0.3	0.385^e; 6.89^f	⋯	0.00
	894			4.1 ± 0.3		⋯	0.00
	914	3s3p^{2 2}D–3p^{3 2}D°		2.0 ± 0.2		⋯	0.00
Cl iv	835	3s²3p^{2 3}P–3s3p^{3 3}P°		2.8 ± 0.3		21 ± 3	0.13
	841			2.6 ± 0.3		18 ± 4	0.11
	863	3s²3p^{2 1}D–3s3p^{3 1}D°		3.3 ± 0.4		⋯	0.00
	978	3s²3p^{2 3}P–3s3p^{3 3}D°		5.3 ± 0.4	0.425^e	⋯	0.00
	985	3s²3p^{2 3}P–3s3p^{3 3}D°		5.7 ± 0.5		⋯	0.00
	1618	3s²3p4p ³P–3s²3p5s ³P°		1.2 ± 0.2^g		25 ± 5	0.30
Cl iii	1015	3s²3p^{3 4}S°–3s3p^{4 4}P		10.7 ± 0.8	0.384^e	⋯	0.00
	1823	3s²3p²3d ⁴F–3s²3p²4p ⁴D°		3.1 ± 0.3^h	1.75ⁱ	⋯	0.00
	1984	3s²3p²3d ⁴D–3s²3p²4p ⁴D°		2.9 ± 0.2^h	1.75ⁱ	⋯	0.00
Cl ii	1071	3s²3p^{4 3}P–3s3p^{5 3}P°		7.5 ± 0.8^h	8.8 ± 0.3^j	⋯	0.00
Cl	961	?		5.7 ± 0.6		⋯	0.00
Cl	2227	?		1.40 ± 0.15		⋯	0.00

Observed wavelength^a (Å)	Spectrum		Calculated wavelength (Å)	Energy (cm⁻¹) of upper term
532.7	Cl vii	4f–6g	533.1	771 664 ± 20^b
820.7		4f–5g	820.8	705 940 ± 75
943.8		5f–7g	944.1	811 337 ± 60
949.2		5g–7h	948.6	811 292 ± 130
1356.3 ± 1		5d–6f		771 341 ± 60
1509.2		5f–6g	1508.9
1521.0		5g–6h	1520.1	771 686 ± 100
1531.0 ± 1		6h–8i	1530.0	837 003 ± 150
2501.6		6f–7g	2501.0
2522.5		6g–7h	2520.7
		6h–7i	2522.8	811 329 ± 110
2212.2		$4 s {{}^{2}S}_{\frac{1}{2}} - 4 p {{}^{2}P}_{\frac{1}{2}} °$
1668.8		$4 p {{}^{2}P}_{\frac{1}{2}} ° - 4 d {{}^{2}D}_{\frac{3}{2}}$
1686.5		${{}^{2}P}_{\frac{3}{2}} ° - {{}^{2}D}_{\frac{5}{2}}$
1246.0	Cl vi	3s3p ¹P°–3p^{2 1}D^c		229 206 ± 40
1767.7		3s4p ³P₀°–3s4d ³D₁
1772.0		³P₁°–³D₂
1783.3		³P₂°–³D₃
2142.2		3s4s ³S₁–3s4p ³P₂°
2159.2		³S₁–³P₁°
2165.0		³S₁–³P₀°
914.5	Cl v	3s3p^{2 2}D–3p^{3 2}D°		295 229 ± 60
865.3	Cl iv	3s²3p^{2 1}D–3s3p^{3 1}D°^c		129 333 ± 70

Spectrum	Wavelength (Å)	Transition	Mean life of upper level (ns)			Cascade mean lives (ns)	Replenishment ratio

			This work		Theory
Cl vii	605	3p ²P°–3d ²D		0.18 ± 0.03^a	0.164^b	0.7 ± 0.2; 6 ± 3	0.25
	800	3s ²S–3p ²P°		0.54 ± 0.05	0.475^c	6 ± 2	0.04
	813			0.55 ±0.06			0.05
	949	5g–7h		1.10 ± 0.10		8 ± 2	0.08
	1509	5f–6g		0.85 ± 0.10		9 ± 3	0.20
	1521	5g–6h		1.0 ±0.2		18 ± 4	0.30
Cl vi	671	3s^{2 1}S–3s3p ¹P°		0.21 ±0.03	0.158^b	3 ± 1	0.26
	1246	3s3p ¹P°–3p^{2 1}D		2.7 ± 0.2		19 ± 3	0.09
	555	3s3p ³P°–3s3d ³D		0.22^d	0.123^b	0.8 ± 0.3; 10	0.40
Cl v	883	3s²3p ²P°–3s3p^{2 2}D		4.2 ± 0.3	0.385^e; 6.89^f	⋯	0.00
	894			4.1 ± 0.3		⋯	0.00
	914	3s3p^{2 2}D–3p^{3 2}D°		2.0 ± 0.2		⋯	0.00
Cl iv	835	3s²3p^{2 3}P–3s3p^{3 3}P°		2.8 ± 0.3		21 ± 3	0.13
	841			2.6 ± 0.3		18 ± 4	0.11
	863	3s²3p^{2 1}D–3s3p^{3 1}D°		3.3 ± 0.4		⋯	0.00
	978	3s²3p^{2 3}P–3s3p^{3 3}D°		5.3 ± 0.4	0.425^e	⋯	0.00
	985	3s²3p^{2 3}P–3s3p^{3 3}D°		5.7 ± 0.5		⋯	0.00
	1618	3s²3p4p ³P–3s²3p5s ³P°		1.2 ± 0.2^g		25 ± 5	0.30
Cl iii	1015	3s²3p^{3 4}S°–3s3p^{4 4}P		10.7 ± 0.8	0.384^e	⋯	0.00
	1823	3s²3p²3d ⁴F–3s²3p²4p ⁴D°		3.1 ± 0.3^h	1.75ⁱ	⋯	0.00
	1984	3s²3p²3d ⁴D–3s²3p²4p ⁴D°		2.9 ± 0.2^h	1.75ⁱ	⋯	0.00
Cl ii	1071	3s²3p^{4 3}P–3s3p^{5 3}P°		7.5 ± 0.8^h	8.8 ± 0.3^j	⋯	0.00
Cl	961	?		5.7 ± 0.6		⋯	0.00
Cl	2227	?		1.40 ± 0.15		⋯	0.00

Abstract

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Figures (4)

Tables (2)

Equations (4)

Journal of the Optical Society of America