Laser optogalvanic spectroscopy for hyperfine structure studies of La i

J. Govindarajan; T. Pramila

doi:10.1364/JOSAB.6.001275

Laser optogalvanic spectroscopy for hyperfine structure studies of La i

J. Govindarajan and T. Pramila

Journal of the Optical Society of America B
Vol. 6,
Issue 7,
pp. 1275-1277
(1989)
•https://doi.org/10.1364/JOSAB.6.001275

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J. Govindarajan and T. Pramila, "Laser optogalvanic spectroscopy for hyperfine structure studies of La i," J. Opt. Soc. Am. B 6, 1275-1277 (1989)

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About this Article
History
- Original Manuscript: August 23, 1988
- Manuscript Accepted: January 23, 1989
- Published: July 1, 1989

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Abstract

High-resolution Doppler-limited laser optogalvanic spectroscopic experiments were conducted in a La–Ne hollow-cathode discharge to study the hyperfine structure of some of the allowed transitions of neutral ¹³⁹La. The magnetic-dipole coupling constants (A) for 21 levels were calculated. The A constants for the levels $x^{4} D_{3 / 2}^{\circ}, z^{4} S_{3 / 2}^{\circ}, x^{4} D_{7 / 2}^{\circ}, u^{2} F_{5 / 2}^{\circ}$ are being reported, we believe, for the first time.

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			Energy (cm⁻¹)

Serial No.	Wavelength (nm)	Transition	Lower Level	Upper Level
1	616.569	$a {{}^{4}P}_{3 / 2} \to x {{}^{4}D}_{3 / 2}^{\circ}$	7490.46	23 704.76
2	593.068	$a {{}^{2}D}_{3 / 2} \to y {{}^{2}F}_{5 / 2}^{\circ}$	0.00	16 856.82
3	593.062	$a {{}^{2}D}_{5 / 2} \to y {{}^{2}F}_{7 / 2}^{\circ}$	1053.20	17 910.18
4	585.558	$a {{}^{4}F}_{5 / 2} \to y {{}^{4}F}_{3 / 2}^{\circ}$	3010.01	20 083.02
5	582.972	$a {{}^{4}P}_{3 / 2} \to z {{}^{4}S}_{3 / 2}^{\circ}$	7490.46	24 639.27
6	582.382	$a {{}^{2}F}_{7 / 2} \to x {{}^{2}D}_{5 / 2}^{\circ}$	8052.15	25 218.25
7	582.199	$a {{}^{2}G}_{7 / 2} \to y {{}^{2}G}_{7 / 2}^{\circ}$	9960.96	27 132.50
8	579.134	$a {{}^{4}F}_{9 / 2} \to y {{}^{4}F}_{9 / 2}^{\circ}$	4121.61	21 384.06
9	578.922	$a {{}^{4}F}_{7 / 2} \to y {{}^{2}F}_{7 / 2}^{\circ}$	3494.53	20 763.21
10	574.441	$a {{}^{4}P}_{5 / 2} \to x {{}^{4}D}_{7 / 2}^{\circ}$	7679.94	25 083.42
11	574.039	$a {{}^{4}F}_{3 / 2} \to y {{}^{4}F}_{3 / 2}^{\circ}$	2668.20	20 083.02
12	573.495	$a {{}^{2}G}_{7 / 2} \to u {{}^{2}F}_{5 / 2}$	9960.96	27 393.00

			A (MHz)

Serial No.	Level	Energy (cm⁻¹)	Present Work	Other Work	Ref.
1	5d6s²a²D_3/2	0.00	147(6)	141	12
2	5d6s²a²D_5/2	1 053.20	210(5)	182	12
3	5d²6s a⁴F_3/2	2 668.20	−480(6)	−480.321(2)	13
4	5d²6s a⁴F_5/2	3 010.01	300(5)	300.563(1)	13
5	5d²6s a⁴F_7/2	3 494.53	459(8)	462.868(1)	13
6	5d²6s a⁴F_9/2	4 121.61	495(4)	489.534(1)	13
7	5d²6s a⁴P_3/2	7 490.46	936(6)	930.0(0.2)	13
8	5d²6s a²F_5/2	7 679.94	810(5)	802.8(0.5)	13
9	5d²6s a²F_7/2	8 052.15	−197(4)	−197.066(6)	13
10	5d²6s a²G_7/2	9 960.96	−300(4)	−289.113(23)	17
11	$5 d 6 s 6 p y {{}^{2}F}_{3 / 2}^{\circ}$	16 856.82	268(6)	262.5(0.3)	14
12	$5 d 6 s 6 p y {{}^{2}F}_{7 / 2}^{\circ}$	17 910.18	280(4)	279.4(0.3)	14
13	$5 d^{2} 6 p y {{}^{4}F}_{3 / 2}^{\circ}$	20 083.02	91(6)	87.0(0.5)	15
14	$5 d^{2} 6 p y {{}^{4}F}_{7 / 2}^{\circ}$	20 763.21	193(8)	192.2(0.3)	15
15	$5 d^{2} 6 p y {{}^{4}F}_{9 / 2}^{\circ}$	21 384.06	96(4)	93.4(0.3)	15
16	$5 d^{2} 6 p x {{}^{4}D}_{3 / 2}^{\circ}$	23 704.76	156(6)	–
17	$5 d^{2} 6 p z {{}^{4}S}_{3 / 2}^{\circ}$	24 639.27	−232(6)	–
18	$5 d^{2} 6 p x {{}^{4}D}_{7 / 2}^{\circ}$	25 083.42	77(4)	–
19	$5 d^{2} 6 p x {{}^{2}D}_{5 / 2}^{\circ}$	25 218.25	100(5)	96.624(9)	17
20	$5 d^{2} 6 p y {{}^{2}G}_{7 / 2}^{\circ}$	27 132.50	88(4)	73.935(76)	17
21	$5 d^{2} 6 p u {{}^{2}F}_{5 / 2}^{\circ}$	27 393.00	−153(5)	–

			Energy (cm⁻¹)

Serial No.	Wavelength (nm)	Transition	Lower Level	Upper Level
1	616.569	$a {{}^{4}P}_{3 / 2} \to x {{}^{4}D}_{3 / 2}^{\circ}$	7490.46	23 704.76
2	593.068	$a {{}^{2}D}_{3 / 2} \to y {{}^{2}F}_{5 / 2}^{\circ}$	0.00	16 856.82
3	593.062	$a {{}^{2}D}_{5 / 2} \to y {{}^{2}F}_{7 / 2}^{\circ}$	1053.20	17 910.18
4	585.558	$a {{}^{4}F}_{5 / 2} \to y {{}^{4}F}_{3 / 2}^{\circ}$	3010.01	20 083.02
5	582.972	$a {{}^{4}P}_{3 / 2} \to z {{}^{4}S}_{3 / 2}^{\circ}$	7490.46	24 639.27
6	582.382	$a {{}^{2}F}_{7 / 2} \to x {{}^{2}D}_{5 / 2}^{\circ}$	8052.15	25 218.25
7	582.199	$a {{}^{2}G}_{7 / 2} \to y {{}^{2}G}_{7 / 2}^{\circ}$	9960.96	27 132.50
8	579.134	$a {{}^{4}F}_{9 / 2} \to y {{}^{4}F}_{9 / 2}^{\circ}$	4121.61	21 384.06
9	578.922	$a {{}^{4}F}_{7 / 2} \to y {{}^{2}F}_{7 / 2}^{\circ}$	3494.53	20 763.21
10	574.441	$a {{}^{4}P}_{5 / 2} \to x {{}^{4}D}_{7 / 2}^{\circ}$	7679.94	25 083.42
11	574.039	$a {{}^{4}F}_{3 / 2} \to y {{}^{4}F}_{3 / 2}^{\circ}$	2668.20	20 083.02
12	573.495	$a {{}^{2}G}_{7 / 2} \to u {{}^{2}F}_{5 / 2}$	9960.96	27 393.00

			A (MHz)

Serial No.	Level	Energy (cm⁻¹)	Present Work	Other Work	Ref.
1	5d6s²a²D_3/2	0.00	147(6)	141	12
2	5d6s²a²D_5/2	1 053.20	210(5)	182	12
3	5d²6s a⁴F_3/2	2 668.20	−480(6)	−480.321(2)	13
4	5d²6s a⁴F_5/2	3 010.01	300(5)	300.563(1)	13
5	5d²6s a⁴F_7/2	3 494.53	459(8)	462.868(1)	13
6	5d²6s a⁴F_9/2	4 121.61	495(4)	489.534(1)	13
7	5d²6s a⁴P_3/2	7 490.46	936(6)	930.0(0.2)	13
8	5d²6s a²F_5/2	7 679.94	810(5)	802.8(0.5)	13
9	5d²6s a²F_7/2	8 052.15	−197(4)	−197.066(6)	13
10	5d²6s a²G_7/2	9 960.96	−300(4)	−289.113(23)	17
11	$5 d 6 s 6 p y {{}^{2}F}_{3 / 2}^{\circ}$	16 856.82	268(6)	262.5(0.3)	14
12	$5 d 6 s 6 p y {{}^{2}F}_{7 / 2}^{\circ}$	17 910.18	280(4)	279.4(0.3)	14
13	$5 d^{2} 6 p y {{}^{4}F}_{3 / 2}^{\circ}$	20 083.02	91(6)	87.0(0.5)	15
14	$5 d^{2} 6 p y {{}^{4}F}_{7 / 2}^{\circ}$	20 763.21	193(8)	192.2(0.3)	15
15	$5 d^{2} 6 p y {{}^{4}F}_{9 / 2}^{\circ}$	21 384.06	96(4)	93.4(0.3)	15
16	$5 d^{2} 6 p x {{}^{4}D}_{3 / 2}^{\circ}$	23 704.76	156(6)	–
17	$5 d^{2} 6 p z {{}^{4}S}_{3 / 2}^{\circ}$	24 639.27	−232(6)	–
18	$5 d^{2} 6 p x {{}^{4}D}_{7 / 2}^{\circ}$	25 083.42	77(4)	–
19	$5 d^{2} 6 p x {{}^{2}D}_{5 / 2}^{\circ}$	25 218.25	100(5)	96.624(9)	17
20	$5 d^{2} 6 p y {{}^{2}G}_{7 / 2}^{\circ}$	27 132.50	88(4)	73.935(76)	17
21	$5 d^{2} 6 p u {{}^{2}F}_{5 / 2}^{\circ}$	27 393.00	−153(5)	–

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