Beam-Foil Spectra of Boron 450–5000 Å*

Indrek Martinson; William S. Bickel; Alf Ölme

doi:10.1364/JOSA.60.001213

Journal of the Optical Society of America
Vol. 60,
Issue 9,
pp. 1213-1220
(1970)
•https://doi.org/10.1364/JOSA.60.001213

Beam-Foil Spectra of Boron 450–5000 Å

Indrek Martinson, William S. Bickel, and Alf Ölme

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Indrek Martinson, William S. Bickel, and Alf Ölme, "Beam-Foil Spectra of Boron 450–5000 Å*," J. Opt. Soc. Am. 60, 1213-1220 (1970)

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Abstract

Electronic transitions in B i–B iv have been studied with the beam-foil technique. Over 100 spectral lines were observed between 450 and 5000 Å. Only half of the lines could be assigned to earlier known boron transitions. Classifications are given for several of the new lines. Mean lives of 33 excited levels in B i–B iv were measured. In most cases the results are in good agreement with theory.

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Charge state	Fraction of total beam

	0.30 MeV	0.50 MeV	1.0 MeV	1.5 MeV
0	0.16	0.08	0.01	…
+1	0.59	0.50	0.28	0.13
+2	0.22	0.35	0.51	0.51
+3	0.03	0.06	0.18	0.35
+4	…	…	…	0.03

Observed wavelength (Å)	Relative intensity (MeV)				Ionization state	Transition	Measured (M) or calculated (C) wavelengths (Å)

	0.25	0.50	1.0	1.5
586.5	VW^b	W	VW	…	II	2s^{2 1}S–2s4p ¹P	586.20 (C)
632.8^a	W	M	W	…	II	2s2p ³P–2p3p ³P
641.5	W	W	W	…	II	2s2p ³P–2p3p ³S
652.0	VW	VW	VW	…	II	2s2p ³P–2p3p ³D
770.8	M	M	M	W	II	2s2p ¹P–2p3p ¹S
775.9	W	VW	VW	…	II	2s2p ³P–2s4s ³S	775.15 (C), 775.18 (C), 775.28 (C)
799.7	…	…	W	M	IV	3d–5f	799.90 (C)
808.7	M	W	W	VW	II	2s2p ¹P–2p3p ¹D
979.1	W	VW	VW	…	II	2s2p ¹P–2s4d ¹D	978.94 (M)
1109.5	…	…	VW	M	IV	3p³P–4d ³D
1169.6	W	M	VS	VS	IV	3d–4f	1169.47 (C)
1207.9	VS	VS	S	M	II	2p^{2 3}P–2p3s ³P	1208.36 (M), 1208.55 (M), 1208.83 (M)
1607.7	M	…	…	…	II	2s2p ¹P–2s3s ¹S	1607.76 (M)
1701.4	S	…	VS	…	III	1s2s2p ⁴P–1s2p^{2 4}P
1926.6	W	…	M	…	II	2s3s ³S–2p3s ³P	1926.61 (M)
1937.2	W	…	M	…	II	2s3p ³P–2p3p ³P
2005.7	W	…	W	…	II	2s3d ³D–2p3d ³D	2005.98 (C)

Measured wavelength (Å)	Relative intensity (MeV)				Suggested ionization state	Suggested transition

	0.25	0.50	1.0	1.5
505.3	…	…	VW^a	…
566.7	VW	W	W	W	ii
723.4	VW	VW	VW	VW	ii
748.4	…	…	…	VW

811.5	…	VW	…	W
824.6	VW	W	VW	VW	ii
836.4	VW	W	VW	VW	ii
893.7	VW	…	VW	…
913.2	VW	W	W	W	ii	2p^{2 3}P–2p3d ³P(?)
998.5	VW	…	VW	…

1188.6	W	W	W	VW	ii
1195.4	VW	W	VW	VW	ii

1214.2	M	S	S	S	iii	1s23sp–⁴P–1s2p4p ⁴P(?)

1259.3	W	…	VW	…
1324.5	S	S	M	W	ii	2p^{2 1}D–2p3s ¹P(?)

1639.5	…	…	W	…
1656.6	VW	…	VW	…
1720.3	VW	…	…	…

1979.5	…	…	W	…
1993.2	VW	…	VW	…	ii	2p^{2 1}S–2p3s ¹P(?)

2015.0	VW	…	W	…
2028.0	VW	…	…	…
2042.0	W	…	M	…	ii
2111.3	VW	…	…	…
2125.0	S	…	M	…	ii
2158.7	W	…	…	…
2250.7	VW	…	…	…
2265.2	VW	…	…	…
2522.0	…	…	W	…

Spectrum	Upper level	Wavelength (Å)	Mean life (ns)

			This work	Other experiments

				Ref. 13	Ref. 19	Ref. 20
B i	2s²3d²D	1826	3.9±0.5^a,b	4.5±0.5		5.1±0.3
B i	2s2p^{2 2}S	1573	3.6±0.3^a
B i	2s2p^{2 2}P	1378	0.54±0.06^a			0.45±0.05
B i	2p^{3 4}S	1466	0.61±0.05^a
B ii	2s2p ¹P	1362	1.15±0.10^a	0.9±0.2		1.0±0.1
B ii	2s3s ¹S	1608	2.7±0.4^a
B ii	2s3p ¹P	693	2.3±0.2		3.6±0.3
B ii	2s3p ¹P	2395	3.0±0.4^a,c
B ii	2s3d ¹D	1230	0.96±0.06
B ii	2p^{2 1}S	1843	1.04±0.08^a
B ii	2p3p ¹P	864	1.6±0.1^a
B ii	2p3p ¹P	2220	1.4±0.2^a
B ii	2p3d ¹D	1048	0.79±0.08
B ii	2s3s ²S	1082	0.41±0.05^a
B ii	2s3d ³D	882	0.52±0.05^a
B ii	2s4d ³D	731	0.99±0.10^a		2.1±0.3

B ii	2p3s ³P	1208	1.4±0.1^a
B ii	2p3s ³P	1926	1.4±0.2^a
B ii	2p^{2 3}P	1624	1.38±0.10^a	1.0±0.2		1.25±0.06
B ii	2p3p ³P	633	2.5±0.3
B ii	2p3p ³P	1937	2.4±0.2
B ii	2p3d ³D	984	0.41±0.04
B iii	2p ²P	2066	5.9±0.6		5.6±0.3	4.0±0.4
B iii	3s ²S	758	0.69±0.06^a
B iii	3p ²P	518	0.9±0.1^a
B iii	3d ²D	677	0.21±0.04^a
B iii	4s ²S	528	1.0±0.2
B iii	4p ²P	1596	1.5±0.2
B iii	4d ²D	511	0.50±0.08^a
B iii	4d ²D	1954	0.54±0.06^a
B iii	4f ²F	2077	1.2±0.2^a
B iii	5f ²F	1421	2.0±0.2
B iii	1s2p^{2 4}P	1701	2.1±0.2
B iv	2p ³P	2824	24±4
B iv	4f ¹F	1169	0.4±0.2
B iv	4f ³F	1169
B iii(?)		1214	0.12±0.03^a
B ii(?)	2p3s ¹P(?)	1324	0.75±0.08
B ii(?)		2125	6±1

Spectrum	Wavelength (Å)	Transition	Transition probability (10⁸ s⁻¹)

			This work	Theory
B i	1826	2s²2p ²P–2s²3d ²D	2.6±0.3^a	2.4	(Ref. 22)
B i	1573	2s²2p ²P–2s2p^{2 2}S	2.8±0.2^a	13	(Ref. 36)
B i	1378	2s²2p ²P–2s2p^{2 2}P	19±2^a	23	(Ref. 36)
B i	1466	2s2p^{2 4}P–2p^{3 4}S	16±1	19.8	(Ref. 22)
B ii	1362	2s^{2 1}S–2s2p ¹P	8.7±0.8	13	(Ref. 37)
B ii	1608	2s2p ¹P–2s3s ¹S	3.7±0.4
B ii	1843	2s2p ¹P–2p^{2 1}S	9.6±0.7	6.8	(Ref. 37)
B ii	1082	2s2p ³P–2s3s ³S	24±2
B ii	1624	2s2p ³P–2p^{2 3}P	7.3±0.5	8.4	(Ref. 37)
B iii	2066	2s ²S–2p ²P	1.7±0.2	1.91	(Ref. 38)
B iii	758	2p ²P–3s ²S	14±1	16.3	(Ref. 38)
B iii	518	2s ²S–3p ²P	11±1^a	12.5	(Ref. 38)
B iii	677	2p ²P–3d ²D	48±9^a	56.8	(Ref. 38)
B iii	2078	3d ²D–4f ²F	8±1^a
B iii	1701	1s2s2p ⁴P–1s2p^{2 4}P	4.8±0.5	5.2	(Ref. 39)
B iv	2824	2s ³S–2p ³P	0.42±0.05	0.455	(Ref. 37)
B iv	1169	3d–4f	25±12	35.4	(Ref. 40)

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Journal of the Optical Society of America