Beam-Foil Excitation Studies of Aluminum with a Heavy-Ion Accelerator

T. Andersen; K. A. Jessen; G. Sorensen

doi:10.1364/JOSA.59.001197

Beam-Foil Excitation Studies of Aluminum with a Heavy-Ion Accelerator

T. Andersen, K. A. Jessen, and G. Sorensen

Journal of the Optical Society of America
Vol. 59,
Issue 9,
pp. 1197-1201
(1969)
•https://doi.org/10.1364/JOSA.59.001197

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T. Andersen, K. A. Jessen, and G. Sorensen, "Beam-Foil Excitation Studies of Aluminum with a Heavy-Ion Accelerator," J. Opt. Soc. Am. 59, 1197-1201 (1969)

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History
- Original Manuscript: April 17, 1969
- Published: September 1, 1969

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Abstract

A 600-keV heavy-ion accelerator equipped with a universal ion source and a magnet capable of separating masses up to uranium was used for beam-foil studies together with a target chamber constructed to fulfill the demands for ion velocities in the energy range of 60–600 keV. The mean lives for singlets and multiplets of Al i through Al iii in the wavelength range 1700–5000 Å are reported. The evaluated mean lives of the 4s ²S and 3d ²D states in Al i agree within 10% with earlier experimental results obtained by the phase-shift method and the level-crossing technique.

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Observed wavelength (Å)
100 keV	300 keV	275 keV5	Spectrum	Transition
	1725 m^a		Al ii	3p ³P⁰–3d ³D
	1764 s^b		Al ii	3p ³P⁰–3p^{2 3}P
	1829 s		Al ii	4s ³S–4s ³P⁰
	1860 s		Al ii	3p ³P⁰–4s ³S
	1860 s		A iii	3s ²S–3p ²P⁰
	1934 m		Al ii	3p^{2 3}P–4s ³P⁰
	1934 m		Al iii	3d ²D–4f ²F⁰
			Al ii	3p ¹P⁰–4d ¹D
2179 w	1990 w^c		Al ii	4s ²S–3d ²P⁰
2193 m	2193 m		Al ii	3d ³D–3d ³F⁰
2207 w			Al i	3p ²P⁰–7d ²D, 3p ²P⁰–8s ²S
2269 w			Al i	3p ²P⁰–6d ²D, 3d ²D–4d ²P⁰
2317 m			Al i	3p^{2 4}P–3d ⁴P⁰
2370 m			Al i	3p ²P⁰–6s ²S, 3p^{2 4}P–3d ⁴D⁰
				and 3p ²P⁰–5d ²D
	2516 m			Unknown
2567 m			Al i	3p ²P⁰–4d ²D
2575 m			Al i	3p ²P⁰–4d ²D
2632 m	2632 m		Al ii	3p^{2 1}D–4f ¹F⁰
2660 w			Al i	3p ²P⁰–5s ²S
2762 w	2762 m		Al iii	4d ²D–6f ²F₀
2762 w	2762 m		Al ii	3d ¹D–9f ¹F⁰, 3d ¹D–10p ¹P⁰
2816 s	2816 m		Al ii	3p ¹P⁰–4s ¹S
2902 w	2902 m		Al ii	4s ³S–5p ³P⁰
	2907 m		Al iii	4f ²F⁰–6g ²G
3050 m	3050 w		Al i	3p^{2 4}P–4s ⁴P⁰
3057 m	3057 w		Al i	3p^{2 4}P–4s ⁴P⁰
3082 s	3082 w		Al i	3p ²P⁰–3d ²D
3092 s	3092 m		Al i	3p ²P⁰–3d ²D
	3351 w		Al ii	3d ¹D–7p ¹P⁰
	3428 w		Al ii	3d ¹D–6f ¹F⁰
		3566	Unknown
3587 s	3587 s		Al ii	3d ³D–4f ³F⁰
3601 s	3601 s		Al iii	3d ²D–4p ²P⁰
3613 m	3613 m		Al iii	3d ²D–4p ²P⁰
3655 w	3655 w		Al ii	4p ³P⁰–5d ³D
	3713 w		Al iii	4p ²P⁰–5s ²S
3944 s			Al i	3p ²P⁰–4s ²S
3961 s			Al i	3p ²P⁰–4s ²S
	4140 w	4140	Al iii	5f ²F⁰–8g ²G
	4150 m	4140	Al iii	4d ²D–5f ²F⁰
		4365	Al ii	4f ¹F⁰–9g ¹G
		4365	Al iii	5p ²P⁰–6d ²D
		4465	Unknown
4480 m	4480 s	4480	Al ii	5p ¹P⁰–12d ¹D
4480 m	4480 s	4480	Al iii	4f ²F⁰–5g ²G
4512 m	4512 m	4505	Al iii	4p ²P⁰–4d ²D
4529 s	4529 s	4505	Al iii	4p ²P⁰–4d ²D
	4640 w	4655	Al ii	4f ³F⁰–8g ³G
	4650 m		Al ii	4f ¹F⁰–8g ¹G
4665 m	4665 m	4665	Al ii	5p ¹P⁰–11s ¹S, 3p^{2 1}D–4p ¹P⁰

Upper state	Lower state	λ in Å	Lifetime (10⁻⁹ sec)			f value this work	Rel. f value (Ref. 12)
Upper state	Lower state	λ in Å	This work	Other methods		f value this work	Rel. f value (Ref. 12)
3d ²D	3p ²P	3092	13.4±0.3^c		13.7±0.4^a	0.178	1.54
$4 s {{}^{2}S}_{\frac{1}{2}}$	$3 p {{}^{2}P}_{\frac{1}{2}}$	3944	6.2±0.4^d		13.6 ^b	0.125	1.00
$4 s {{}^{2}S}_{\frac{1}{2}}$	$3 p {{}^{2}P}_{\frac{3}{2}}$	3961	6.4±0.4^d		6.43±0.12^a	0.123	1.00
4d ²D	3p ²P	2575	16.1±0.3^c		7.05±0.3^a	0.102	0.39

Spectrum	Upper state	Lower state	λ in Å	Lifetime (10⁻⁹ sec)
Al ii	4s ¹S	3p ¹P⁰	2816	5.9±0.3^a
Al ii	4d ¹D	3p ¹P⁰	1990	1.9±0.3^a
Al ii	4f ³F⁰	3d ³D	3587	4.8±0.6^b
Al ii	5p ³P⁰	4s ³S	2903	3.9±0.5^c
Al ii	4f ¹F⁰	3p^{2 1}D	2632	5.0±0.2^a
Al ii	3d ³D	3d ³F⁰	2194	4.2±0.2^a
Al ii	4s ³S	4s ³P⁰	1830	3.6±0.3^a
Al iii	4p ²P⁰	3d ²D	3601, 3613	3.4±0.3^d
Al iii	4d ²D	4p ²P⁰	4512, 4529	4.4±0.4^b
Al iii	5s ²S	4p ²P⁰	3713	3.5±0.2^a
Al iii	5f ²F⁰	4d ²D	4150	2.8±0.4^b

Observed wavelength (Å)
100 keV	300 keV	275 keV5	Spectrum	Transition
	1725 m^a		Al ii	3p ³P⁰–3d ³D
	1764 s^b		Al ii	3p ³P⁰–3p^{2 3}P
	1829 s		Al ii	4s ³S–4s ³P⁰
	1860 s		Al ii	3p ³P⁰–4s ³S
	1860 s		A iii	3s ²S–3p ²P⁰
	1934 m		Al ii	3p^{2 3}P–4s ³P⁰
	1934 m		Al iii	3d ²D–4f ²F⁰
			Al ii	3p ¹P⁰–4d ¹D
2179 w	1990 w^c		Al ii	4s ²S–3d ²P⁰
2193 m	2193 m		Al ii	3d ³D–3d ³F⁰
2207 w			Al i	3p ²P⁰–7d ²D, 3p ²P⁰–8s ²S
2269 w			Al i	3p ²P⁰–6d ²D, 3d ²D–4d ²P⁰
2317 m			Al i	3p^{2 4}P–3d ⁴P⁰
2370 m			Al i	3p ²P⁰–6s ²S, 3p^{2 4}P–3d ⁴D⁰
				and 3p ²P⁰–5d ²D
	2516 m			Unknown
2567 m			Al i	3p ²P⁰–4d ²D
2575 m			Al i	3p ²P⁰–4d ²D
2632 m	2632 m		Al ii	3p^{2 1}D–4f ¹F⁰
2660 w			Al i	3p ²P⁰–5s ²S
2762 w	2762 m		Al iii	4d ²D–6f ²F₀
2762 w	2762 m		Al ii	3d ¹D–9f ¹F⁰, 3d ¹D–10p ¹P⁰
2816 s	2816 m		Al ii	3p ¹P⁰–4s ¹S
2902 w	2902 m		Al ii	4s ³S–5p ³P⁰
	2907 m		Al iii	4f ²F⁰–6g ²G
3050 m	3050 w		Al i	3p^{2 4}P–4s ⁴P⁰
3057 m	3057 w		Al i	3p^{2 4}P–4s ⁴P⁰
3082 s	3082 w		Al i	3p ²P⁰–3d ²D
3092 s	3092 m		Al i	3p ²P⁰–3d ²D
	3351 w		Al ii	3d ¹D–7p ¹P⁰
	3428 w		Al ii	3d ¹D–6f ¹F⁰
		3566	Unknown
3587 s	3587 s		Al ii	3d ³D–4f ³F⁰
3601 s	3601 s		Al iii	3d ²D–4p ²P⁰
3613 m	3613 m		Al iii	3d ²D–4p ²P⁰
3655 w	3655 w		Al ii	4p ³P⁰–5d ³D
	3713 w		Al iii	4p ²P⁰–5s ²S
3944 s			Al i	3p ²P⁰–4s ²S
3961 s			Al i	3p ²P⁰–4s ²S
	4140 w	4140	Al iii	5f ²F⁰–8g ²G
	4150 m	4140	Al iii	4d ²D–5f ²F⁰
		4365	Al ii	4f ¹F⁰–9g ¹G
		4365	Al iii	5p ²P⁰–6d ²D
		4465	Unknown
4480 m	4480 s	4480	Al ii	5p ¹P⁰–12d ¹D
4480 m	4480 s	4480	Al iii	4f ²F⁰–5g ²G
4512 m	4512 m	4505	Al iii	4p ²P⁰–4d ²D
4529 s	4529 s	4505	Al iii	4p ²P⁰–4d ²D
	4640 w	4655	Al ii	4f ³F⁰–8g ³G
	4650 m		Al ii	4f ¹F⁰–8g ¹G
4665 m	4665 m	4665	Al ii	5p ¹P⁰–11s ¹S, 3p^{2 1}D–4p ¹P⁰

Upper state	Lower state	λ in Å	Lifetime (10⁻⁹ sec)			f value this work	Rel. f value (Ref. 12)
Upper state	Lower state	λ in Å	This work	Other methods		f value this work	Rel. f value (Ref. 12)
3d ²D	3p ²P	3092	13.4±0.3^c		13.7±0.4^a	0.178	1.54
$4 s {{}^{2}S}_{\frac{1}{2}}$	$3 p {{}^{2}P}_{\frac{1}{2}}$	3944	6.2±0.4^d		13.6 ^b	0.125	1.00
$4 s {{}^{2}S}_{\frac{1}{2}}$	$3 p {{}^{2}P}_{\frac{3}{2}}$	3961	6.4±0.4^d		6.43±0.12^a	0.123	1.00
4d ²D	3p ²P	2575	16.1±0.3^c		7.05±0.3^a	0.102	0.39

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