Absolute Oscillator Strengths for Some Resonance Multiplets of Ca i,ii, Mg i,ii, B i, and Al i*

William Hayden Smith; Harvey S. Liszt

doi:10.1364/JOSA.61.000938

Journal of the Optical Society of America
Vol. 61,
Issue 7,
pp. 938-941
(1971)
•https://doi.org/10.1364/JOSA.61.000938

Absolute Oscillator Strengths for Some Resonance Multiplets of Ca i,ii, Mg i,ii, B i, and Al i

William Hayden Smith and Harvey S. Liszt

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William Hayden Smith and Harvey S. Liszt, "Absolute Oscillator Strengths for Some Resonance Multiplets of Ca i,ii, Mg i,ii, B i, and Al i*," J. Opt. Soc. Am. 61, 938-941 (1971)

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Abstract

Radiative-lifetime studies of the more prominent resonance transitions of Ca i,ii, Mg i,ii, B i, and Al i between 1800 and 4250 Å are presented. The results for the lowest member of the resonance series are in good agreement with most previous-literature values obtained with Hanle-effect or beam-foil techniques. Results for the higher members of the resonance series for Mg i and Ca i are compared with previous results. These data are discussed and oscillator strengths are given.

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Element	λ(Å)	Transition		A_T^a(10⁸ s⁻¹)	f value	τ (10⁻⁹ s)^b	Cascading parameters^c
Mg i	2852.96	3s² ¹S°–3p ¹P°	0–1	5.26	1.86	1.90±0.3	T=100, β=0.63
Mg i	2026.54	3s² ¹S°–4p ¹P°	0–1	0.96	0.18	10.4 ±2.0	T=100, β=0.27
Mg i	1828.17	3s² ¹S°–5p ¹P°	0–1	0.36	0.055	28 ±5.0	T=150, β=0.20
Mg ii	2803.52	3s ²S–3p ²P°	$\frac{1}{2} - \frac{1}{2}$	2.70	0.31	3.7 ±0.5	T= 85, β=0.25
	2796.34	3s ²S–3p ²P°	$\frac{1}{2} - \frac{3}{2}$	2.70	0.62	3.7 ±0.5	T= 85, β=0.25
Ca i	4226.73	4s² ¹S°–4p ¹P°	0–1	2.17	1.75	4.6 ±0.6	T= 90, β=0.18
Ca i	2721.65	4s² ¹S°–5p ¹P°	0–1	0.60	0.20	16.6 ±2.0	T=200, β=0.65
Ca ii	3968.47	4s ²S–4p ²P°	$\frac{1}{2} - \frac{1}{2}$	1.41	0.34^d	7.1 ±0.80	T=110, β=0.28
	3933.66	4s ²S–4p ²P°	$\frac{1}{2} - \frac{3}{2}$	1.41	0.63^d	7.1 ±0.80	T=110, β=0.28
Al i	3944.01	3p ²P°–4s ²S	$\frac{1}{2} - \frac{1}{2}$	1.45	0.12	6.9 ±0.7	⋯
Al i	3082.16	3p ²P°–3d ²D	$\frac{1}{2} - \frac{3}{2}$	0.76	0.18	13.1 ±2.0	T= 30, β=0.14
B i	2496.77	2p ²P°–3s ²S	$\frac{1}{2} - \frac{1}{2}$	4.0	0.12	2.5 ±0.5	T= 30, β=1.2

Species	Wavelength	Lifetime^a	Previous results^a	Reference	Technique
Mg i	2852.96Å	1.90±0.3	1.99±0.08	10	phase shift
			2.2 ±0.2	2	beam foil
			2.03±0.06	5	Hanle effect
			1.5 ±0.2	3	beam foil
			3.29±0.16	9	phase shift
			3.56±0.9	15	anomalous dispersion
Mg i	2026.54	10.4 ±2.0	8.3	14	theory
Mg i	1828.17	28 ±5	⋯	⋯	⋯
Mg ii	2796.34, 2803.52	3.7 ±0.5	3.67±0.18	5	Hanle effect
			3.84	b	theory
			3.97	c	theory
			4.5 ±0.8	2	beam foil
			4.8 ±0.4	3	beam foil
Ca i	4226.73	4.6 ±0.6	4.48±0.15	8	Hanle effect
			4.62±0.15	5	Hanle effect
			4.67±0.11	10	phase shift
			6.2 ±0.5	2	beam foil
			5.4 ±0.14	14	Hook
Ca i	2721.65	16.6 ±2.0	3700	16	anomalous dispersion
			135	17	arc
Ca ii	3933.68, 3968.47	7.1 ±0.8	6.72±0.20	5	Hanle effect
Al i	3944–3961	6.9 ±0.7	6.4 ±0.4	4	beam foil
			7.05±0.3	20	phase shift
			6.43±0.12	9	phase shift
Al i	3092	13.1 ±1.5	13.4 ±0.4	4	beam foil
			13.7 ±0.4	20	phase shift
			13.6 ±0.4	21	level crossing
B i	2497	2.5 ±0.5	5.7 ±0.2	19	beam foil
			3.8 ±0.2	18	beam foil
			3.4 ±0.4	d	beam foil

Element	λ(Å)	Transition		A_T^a(10⁸ s⁻¹)	f value	τ (10⁻⁹ s)^b	Cascading parameters^c
Mg i	2852.96	3s² ¹S°–3p ¹P°	0–1	5.26	1.86	1.90±0.3	T=100, β=0.63
Mg i	2026.54	3s² ¹S°–4p ¹P°	0–1	0.96	0.18	10.4 ±2.0	T=100, β=0.27
Mg i	1828.17	3s² ¹S°–5p ¹P°	0–1	0.36	0.055	28 ±5.0	T=150, β=0.20
Mg ii	2803.52	3s ²S–3p ²P°	$\frac{1}{2} - \frac{1}{2}$	2.70	0.31	3.7 ±0.5	T= 85, β=0.25
	2796.34	3s ²S–3p ²P°	$\frac{1}{2} - \frac{3}{2}$	2.70	0.62	3.7 ±0.5	T= 85, β=0.25
Ca i	4226.73	4s² ¹S°–4p ¹P°	0–1	2.17	1.75	4.6 ±0.6	T= 90, β=0.18
Ca i	2721.65	4s² ¹S°–5p ¹P°	0–1	0.60	0.20	16.6 ±2.0	T=200, β=0.65
Ca ii	3968.47	4s ²S–4p ²P°	$\frac{1}{2} - \frac{1}{2}$	1.41	0.34^d	7.1 ±0.80	T=110, β=0.28
	3933.66	4s ²S–4p ²P°	$\frac{1}{2} - \frac{3}{2}$	1.41	0.63^d	7.1 ±0.80	T=110, β=0.28
Al i	3944.01	3p ²P°–4s ²S	$\frac{1}{2} - \frac{1}{2}$	1.45	0.12	6.9 ±0.7	⋯
Al i	3082.16	3p ²P°–3d ²D	$\frac{1}{2} - \frac{3}{2}$	0.76	0.18	13.1 ±2.0	T= 30, β=0.14
B i	2496.77	2p ²P°–3s ²S	$\frac{1}{2} - \frac{1}{2}$	4.0	0.12	2.5 ±0.5	T= 30, β=1.2

Species	Wavelength	Lifetime^a	Previous results^a	Reference	Technique
Mg i	2852.96Å	1.90±0.3	1.99±0.08	10	phase shift
			2.2 ±0.2	2	beam foil
			2.03±0.06	5	Hanle effect
			1.5 ±0.2	3	beam foil
			3.29±0.16	9	phase shift
			3.56±0.9	15	anomalous dispersion
Mg i	2026.54	10.4 ±2.0	8.3	14	theory
Mg i	1828.17	28 ±5	⋯	⋯	⋯
Mg ii	2796.34, 2803.52	3.7 ±0.5	3.67±0.18	5	Hanle effect
			3.84	b	theory
			3.97	c	theory
			4.5 ±0.8	2	beam foil
			4.8 ±0.4	3	beam foil
Ca i	4226.73	4.6 ±0.6	4.48±0.15	8	Hanle effect
			4.62±0.15	5	Hanle effect
			4.67±0.11	10	phase shift
			6.2 ±0.5	2	beam foil
			5.4 ±0.14	14	Hook
Ca i	2721.65	16.6 ±2.0	3700	16	anomalous dispersion
			135	17	arc
Ca ii	3933.68, 3968.47	7.1 ±0.8	6.72±0.20	5	Hanle effect
Al i	3944–3961	6.9 ±0.7	6.4 ±0.4	4	beam foil
			7.05±0.3	20	phase shift
			6.43±0.12	9	phase shift
Al i	3092	13.1 ±1.5	13.4 ±0.4	4	beam foil
			13.7 ±0.4	20	phase shift
			13.6 ±0.4	21	level crossing
B i	2497	2.5 ±0.5	5.7 ±0.2	19	beam foil
			3.8 ±0.2	18	beam foil
			3.4 ±0.4	d	beam foil

Abstract

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Equations (8)

Journal of the Optical Society of America