Beam-foil study of nitrogen between 100 and 400 Å

J. P. Buchet; M. C. Buchet-Poulizac

doi:10.1364/JOSA.64.001011

Journal of the Optical Society of America
Vol. 64,
Issue 7,
pp. 1011-1014
(1974)
•https://doi.org/10.1364/JOSA.64.001011

Beam-foil study of nitrogen between 100 and 400 Å

J. P. Buchet and M. C. Buchet-Poulizac

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J. P. Buchet and M. C. Buchet-Poulizac, "Beam-foil study of nitrogen between 100 and 400 Å," J. Opt. Soc. Am. 64, 1011-1014 (1974)

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Abstract

The beam–foil spectrum of nitrogen has been studied between 100 and 400 Å at a beam energy of 2 MeV. The observed lines belong to N iii-N vi. Some of them may be attributed to transitions between doubly excited states of the quartet system of N v. The mean lives of several terms of N iv–N vi have been measured.

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Wavelength (Å)			Energy of upper term(eV)^b
Observed^a	Calculated	Suggested classification	Observed	Calculated
177.0	177.11	1s2s2p ⁴P°–1s2s4s ⁴S	484.7	484.62
	177.29	1s2s2p ⁴P°–1s2p3p ⁴P		484.55
193.4	189.96	1s2s2p ⁴P°–1s2s3d ⁴D	478.7	479.88
202.5		1s2p^{2 4}P–1s2p3d 4P°	486.9
204.7	204.29	1s2p^{2 4}P–1s2p3d ⁴D°	486.3	485.40
211.0	211.29	1s2s2p ⁴P°–1s2s3s ⁴S	473.4	473.30
223.3		1s2p^{2 4}P–1s2p3s ⁴P°	481.2

Wavelength (Å)	Multiplet	This work	Lifetime of upper term (ns) Other experiments	Theory^a
N iv
197.2^b	2s^{2 1}S–2s4p ¹P°	0.16±0.02	0.55^c,d	0.33^e
225.2	2s2p ³P°–2s4d ³D	0.093±0.009	0.17^c,f
234.2	2s2p ³P°–2p3p ³P	0.18±0.02	7.83^c,d	7.78^e
237.9	2s2p ³P°–2s4s ³S	0.12±0.01
239.7^b	2s2p ³P°–2p3p ¹D	0.30±0.02	0.22^c,d–0.33^c,d	29.3^e
260.4	2s2p ¹P°–2s4d ¹D	0.12±0.02	0.9^c,d	0.12^e
271	2s2p ¹P°–2p3p ¹D	0.11±0.01	0.082^c,d	9.4^e
283.5	2s2p ³P°–2s3d ³D	0.043±0.005		0.035^g–0.034^h
285.6	2s2p ¹P°–2p3p ¹P	0.12±0.01
297.7	2p² ³P–2p3d ³P°	0.078±0.007	0.62^c,d	0.12^e
300.3	2p^{2 1}D–2s4f ¹F°	0.067±0.006
303.1^b	2p^{2 3}P–2p3d ³D°	0.031±0.004	0.227^c,d	0.59^e
305^b	2p^{2 3}P–2s4p ³P°	0.17±0.02
315^b	2p^{2 1}D–2p3d ¹F°	0.075±0.007
322.6^b	2s2p ³P°–2s3s ³S	0.13±0.01		0.115^g–0.125^h
335	2s2p ¹P°–2s3d ¹D	0.058±0.006	0.050ⁱ–0.07^f–0.055^c,d	0.054^g–0.042^h
345	2p^{2 3}P–2p3s ³P°	0.15±0.02	0.15ⁱ–0.20^f–0.30^c,d	0.26^e
N v
162.6	2s ²S–4p ²P°	0.15±0.02	0.17ⁱ–0.47^e,f
166.9	2p ²P°–5d ²D	0.12±0.02	0.95^c,d	0.103^e
186.1	2p ²P°–4d ²D	0.063±0.006	0.065ⁱ–0.12^c,f	0.054^g
190.2	2p ²P°–4s ²S	0.17±0.02		0.173^g
209.3	2s ²S–3p ²P°	0.083±0.008	0.084ⁱ–0.072^j–009^c,d	0.083^g
247.7^b	2p ²P°–3d ²D	0.026±0.002	0.27^j	0.023^g
266.3	2p ²P°–3s ²S	0.12±0.01	0.12ⁱ	0.110^g
N vi
161.2	1s2s ³S–1s3p ³P°	0.040±0.005	0.043^j	0.035^g
173.9	1s2p ³P°–1s3d ³D	≤0.025^k	0.010^j	0.0114^g
N v^l
193.4	1s2s2p ⁴P°–1s2s3d ⁴D	0.040±0.005

Wavelength (Å)			Energy of upper term(eV)^b
Observed^a	Calculated	Suggested classification	Observed	Calculated
177.0	177.11	1s2s2p ⁴P°–1s2s4s ⁴S	484.7	484.62
	177.29	1s2s2p ⁴P°–1s2p3p ⁴P		484.55
193.4	189.96	1s2s2p ⁴P°–1s2s3d ⁴D	478.7	479.88
202.5		1s2p^{2 4}P–1s2p3d 4P°	486.9
204.7	204.29	1s2p^{2 4}P–1s2p3d ⁴D°	486.3	485.40
211.0	211.29	1s2s2p ⁴P°–1s2s3s ⁴S	473.4	473.30
223.3		1s2p^{2 4}P–1s2p3s ⁴P°	481.2

Wavelength (Å)	Multiplet	This work	Lifetime of upper term (ns) Other experiments	Theory^a
N iv
197.2^b	2s^{2 1}S–2s4p ¹P°	0.16±0.02	0.55^c,d	0.33^e
225.2	2s2p ³P°–2s4d ³D	0.093±0.009	0.17^c,f
234.2	2s2p ³P°–2p3p ³P	0.18±0.02	7.83^c,d	7.78^e
237.9	2s2p ³P°–2s4s ³S	0.12±0.01
239.7^b	2s2p ³P°–2p3p ¹D	0.30±0.02	0.22^c,d–0.33^c,d	29.3^e
260.4	2s2p ¹P°–2s4d ¹D	0.12±0.02	0.9^c,d	0.12^e
271	2s2p ¹P°–2p3p ¹D	0.11±0.01	0.082^c,d	9.4^e
283.5	2s2p ³P°–2s3d ³D	0.043±0.005		0.035^g–0.034^h
285.6	2s2p ¹P°–2p3p ¹P	0.12±0.01
297.7	2p² ³P–2p3d ³P°	0.078±0.007	0.62^c,d	0.12^e
300.3	2p^{2 1}D–2s4f ¹F°	0.067±0.006
303.1^b	2p^{2 3}P–2p3d ³D°	0.031±0.004	0.227^c,d	0.59^e
305^b	2p^{2 3}P–2s4p ³P°	0.17±0.02
315^b	2p^{2 1}D–2p3d ¹F°	0.075±0.007
322.6^b	2s2p ³P°–2s3s ³S	0.13±0.01		0.115^g–0.125^h
335	2s2p ¹P°–2s3d ¹D	0.058±0.006	0.050ⁱ–0.07^f–0.055^c,d	0.054^g–0.042^h
345	2p^{2 3}P–2p3s ³P°	0.15±0.02	0.15ⁱ–0.20^f–0.30^c,d	0.26^e
N v
162.6	2s ²S–4p ²P°	0.15±0.02	0.17ⁱ–0.47^e,f
166.9	2p ²P°–5d ²D	0.12±0.02	0.95^c,d	0.103^e
186.1	2p ²P°–4d ²D	0.063±0.006	0.065ⁱ–0.12^c,f	0.054^g
190.2	2p ²P°–4s ²S	0.17±0.02		0.173^g
209.3	2s ²S–3p ²P°	0.083±0.008	0.084ⁱ–0.072^j–009^c,d	0.083^g
247.7^b	2p ²P°–3d ²D	0.026±0.002	0.27^j	0.023^g
266.3	2p ²P°–3s ²S	0.12±0.01	0.12ⁱ	0.110^g
N vi
161.2	1s2s ³S–1s3p ³P°	0.040±0.005	0.043^j	0.035^g
173.9	1s2p ³P°–1s3d ³D	≤0.025^k	0.010^j	0.0114^g
N v^l
193.4	1s2s2p ⁴P°–1s2s3d ⁴D	0.040±0.005

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Journal of the Optical Society of America