126:
276:
Since the hydrogen Lyman-alpha radiation is strongly absorbed by the air, its observation in laboratory requires use of vacuumed spectroscopic systems. For the same reason, Lyman-alpha astronomy is ordinarily carried out by satellite-borne instruments, except for observing extremely distant sources
481:
474:
467:
153:
292:. Within the experimental uncertainties, the measured frequency is equal to that of hydrogen, in agreement with predictions of
385:
163:
567:
526:
516:
511:
156:
521:
552:
268:
state is associated with the more energetic (having a shorter wavelength) spectral line in the doublet.
377:
134:
562:
531:
490:
170:
67:
557:
293:
141:
doublet with the wavelengths of 1215.668 and 1215.674 angstroms. These components are called Ly-α
371:
326:
8:
311:
437:
410:
321:
306:
110:
35:
442:
391:
381:
432:
422:
316:
138:
51:
427:
546:
506:
395:
27:
501:
459:
446:
289:
125:
109:(UV) part of the electromagnetic spectrum. More specifically, Ly-α lies in
55:
39:
106:
348:
71:
94:
278:
244:
state has a higher energy and so is energetically farther from the
75:
43:
31:
350:
NIST Atomic
Spectra Database, NIST Standard Reference Database 78
411:"Observation of the 1S–2P Lyman-α transition in antihydrogen"
282:
248: = 1 state to which it is transitioning. Thus, the
184: = 1 orbital, there are two possible states, with
114:
373:
113:(VUV), characterized by a strong absorption in the
544:
353:, National Institute of Standards and Technology
346:
475:
16:Spectral line of hydrogen in the Lyman series
489:
347:Kramida, Alexander; Ralchenko, Yuri (1999),
482:
468:
409:Ahmadi, M.; et al. (22 August 2018).
436:
426:
124:
224:, resulting in a spectral doublet. The
545:
408:
369:
463:
137:, the Lyman-alpha line splits into a
13:
14:
579:
120:
281:allow the line to penetrate the
42:. It is emitted when the atomic
402:
363:
340:
288:The line was also observed in
271:
169:of the electron, not just the
1:
333:
105:, places Lyman-alpha in the
34:(or, more generally, of any
7:
299:
10:
584:
378:Princeton University Press
568:Astronomical spectroscopy
497:
428:10.1038/s41586-018-0435-1
370:Draine, Bruce T. (2010).
491:Hydrogen spectral series
171:orbital angular momentum
129:The Lyman-alpha doublet.
68:principal quantum number
294:quantum electrodynamics
152:The eigenstates of the
62: = 1), where
22:, typically denoted by
135:spin–orbit interaction
130:
93:), corresponding to a
553:Emission spectroscopy
128:
46:transitions from an
376:. Princeton, N.J.:
312:Lyman-alpha emitter
159:are labeled by the
70:. In hydrogen, its
322:Lyman-break galaxy
307:Lyman-alpha forest
131:
540:
539:
421:(7720): 211–215.
387:978-1-4008-3908-7
36:one-electron atom
575:
563:Hydrogen physics
527:Humphreys series
484:
477:
470:
461:
460:
451:
450:
440:
430:
406:
400:
399:
367:
361:
360:
359:
358:
344:
317:Lyman-alpha blob
267:
265:
264:
261:
258:
243:
241:
240:
237:
234:
223:
221:
220:
217:
214:
203:
201:
200:
197:
194:
180: = 2,
164:angular momentum
149:, respectively.
104:
102:
92:
90:
87:
81:
583:
582:
578:
577:
576:
574:
573:
572:
543:
542:
541:
536:
517:Brackett series
493:
488:
457:
455:
454:
407:
403:
388:
368:
364:
356:
354:
345:
341:
336:
331:
302:
274:
262:
259:
256:
255:
253:
238:
235:
232:
231:
229:
218:
215:
212:
211:
209:
198:
195:
192:
191:
189:
148:
144:
133:Because of the
123:
100:
98:
88:
85:
83:
80:121.567 nm
79:
50: = 2
17:
12:
11:
5:
581:
571:
570:
565:
560:
558:Atomic physics
555:
538:
537:
535:
534:
529:
524:
519:
514:
512:Paschen series
509:
504:
498:
495:
494:
487:
486:
479:
472:
464:
453:
452:
401:
386:
380:. p. 83.
362:
338:
337:
335:
332:
330:
329:
324:
319:
314:
309:
303:
301:
298:
273:
270:
146:
142:
139:fine-structure
122:
121:Fine structure
119:
15:
9:
6:
4:
3:
2:
580:
569:
566:
564:
561:
559:
556:
554:
551:
550:
548:
533:
530:
528:
525:
523:
520:
518:
515:
513:
510:
508:
507:Balmer series
505:
503:
500:
499:
496:
492:
485:
480:
478:
473:
471:
466:
465:
462:
458:
448:
444:
439:
434:
429:
424:
420:
416:
412:
405:
397:
393:
389:
383:
379:
375:
374:
366:
352:
351:
343:
339:
328:
325:
323:
320:
318:
315:
313:
310:
308:
305:
304:
297:
295:
291:
286:
284:
280:
269:
252: =
251:
247:
228: =
227:
208: =
207:
188: =
187:
183:
179:
175:
172:
168:
165:
162:
158:
155:
150:
140:
136:
127:
118:
116:
112:
108:
96:
77:
73:
69:
65:
61:
57:
53:
49:
45:
41:
37:
33:
29:
28:spectral line
25:
21:
532:Other series
522:Pfund series
502:Lyman series
456:
418:
414:
404:
372:
365:
355:, retrieved
349:
342:
327:K-alpha line
290:antihydrogen
287:
285:atmosphere.
275:
249:
245:
225:
205:
185:
181:
177:
173:
166:
160:
151:
132:
63:
59:
56:ground state
47:
40:Lyman series
23:
19:
18:
272:Observation
157:Hamiltonian
107:ultraviolet
74:of 1215.67
20:Lyman-alpha
547:Categories
357:2021-06-27
334:References
103:10 Hz
72:wavelength
396:706016938
279:redshifts
176:. In the
154:perturbed
111:vacuum UV
97:of about
95:frequency
91:10 m
76:angstroms
38:) in the
447:30135588
300:See also
145:and Ly-α
44:electron
32:hydrogen
438:6786973
266:
254:
242:
230:
222:
210:
202:
190:
66:is the
54:to the
52:orbital
26:, is a
445:
435:
415:Nature
394:
384:
277:whose
283:Earth
161:total
84:1.215
443:PMID
392:OCLC
382:ISBN
204:and
99:2.47
24:Ly-α
433:PMC
423:doi
419:560
147:1/2
143:3/2
115:air
82:or
30:of
549::
441:.
431:.
417:.
413:.
390:.
296:.
117:.
86:67
483:e
476:t
469:v
449:.
425::
398:.
263:2
260:/
257:3
250:j
246:n
239:2
236:/
233:3
226:j
219:2
216:/
213:3
206:j
199:2
196:/
193:1
186:j
182:l
178:n
174:l
167:j
101:Ă—
89:Ă—
78:(
64:n
60:n
58:(
48:n
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
