tee a , = i, 2. ero < S FOR INTENSITTES TREE "Table +6-—-COMPARIION or SPECTRALNAPPER ae en eto TEST $3AND XINGE** . NE. BAND AT 4276 A.OB-TUMBLER-S oe Abs- + Wavelengtitg ee totanatey (s0e See, tape. wre | :. Half quantum: ~ (measured: -mS numberz; - for Tumblesres: “Tuabler-Seippee >~ King’. 0 oft". ee eeee - Re on-. SnapperShi... (30.7 kt, total." (840 kt, total a See - ae ee Tt “> Tt . ; oe ee ‘De , . _ " ve Po8 O58 2. OO ne ABT 66.4- 5. 44 2 - 10.5. , 68TF 11.6 7s OBS aS . ° “188° 0 (Superpositio: ~ of bands). — . . 18.5 19.5 20.5 21.5 23.5 “ — . —“r BF O06L OME ee - 0,06A~.. sod, wo 0.18~. Le al oo. was 00To > 018." we 0.08 on ><<n lok 0.057.-. O16. Ot . re 89,827stat 0.06 2 2 O88 ee 58.0. - 0.06 ~ O4R = on _ 58.10.0F -” ew O16F 7, . ow 53.6 eeAa -~ Oboe ste - 49.2. 47.5 45.20 43.20. 41.2 008 0.19 "0.0% gOS 0.08“Oe: O.2de 0.22" 0.08. = ° 0.28 Total 1.0& = © 2.27" 4.4 DISCUSSION OF OTHER STRUCTURE 4 4.1 oT , Be oo General It ia principally absorption due to molecules either produced or 0 excited by the action of the bomb that gives the characteristic features of the spectra. The conspicuous molecules are O,, Nf, NO:, and HNO;. These are products and by-products of the disturbed air close to the fireball. In addition, molecules formed from the combination of atoms of the casing and those of... . the atmosphere would be expected, especially when case materials are observed... Indeed, . aluminum monoxide (AlO) absorption bands are observed very prominently in Tumbler-Snapper 2 and weakly in emission in Tumbler-Snapper 3 and Tumbler-Snapper 4. Cyanogen (CN)ap~ pears to be present in Tumbler-Snapper 4, and it may be present in Tumbler-Snapper 3. When atomic lines of barium, aluminum, and iron appear, they may be accounted for by the presence: of these materials in the high explosive, the bomb case, or the tower. However, these atomic lines are not always seen though the material may be present. There are many wavelengths not yet identified, especially at both ends of the table. Some of these lines may be due to molecular transitions not yet recorded in the literature. Because of the choppy nature of the spectra near the uitraviolet cutoff, measurements and identifications were very difficult in this region. There is also considerable structure at long wavelengths: ; left unidentified at present. ~~" Whether one says the spectra of the varioua bombs arealike or not depends on the point © of view taken. Many of the same wavelengtha will appear in different shots under corresponding conditions of space and time. On the other hand, the general appearance can be quite different from shot to shot. Some of this difference. can be attributed ta overlapping of bands and changes in their intensity. For example, an increase of Intensity of absorption in Mike givea a spectrum which looks unusual below 4000 A, but even here the molecular spectrum agreesroughly in contour with those of total-time bombs of lower yield. 38