ENTRY M0580 20230614 M125M0580 0 1 SUBENT M0580001 20230614 M125M0580 1 1 BIB 12 46 M0580 1 2 TITLE Photon scattering from 206Pb. M0580 1 3 AUTHOR (A.M.Nathan,P.L.Cole,P.T.Debevec,S.D.Hoblit, M0580 1 4 S.F.LeBrun,D.H.Wright) M0580 1 5 REFERENCE (J,PR/C,34,480,1986) M0580 1 6 INSTITUTE (1USAUI) M0580 1 7 FACILITY (MICRT,1USAUI) University of Illinois MUSL-2 M0580 1 8 accelerator. M0580 1 9 INC-SOURCE (TAGD) M0580 1 10 METHOD (EXTB,SITA) M0580 1 11 DETECTOR (NAICR) High efficiency, good resolution NaI M0580 1 12 spectrometer (NaI(Tl) crystal, 25 cm in diameter M0580 1 13 and 30 cm long, surrounded by 11.4-cm-thick annulus M0580 1 14 and disk of NE102 plastic scintillator which served M0580 1 15 as an anticoincidence shield). M0580 1 16 SAMPLE (82-PB-206,ENR=0.993) The scattered target was M0580 1 17 metallic lead, containing 88.3% 206Pb, 9.0% 207Pb, M0580 1 18 and 2.7% 208Pb. Typical target thickness ranged M0580 1 19 from 3 to 7 g/cm**2. M0580 1 20 ERR-ANALYS (ERR-S) Statistical errors. M0580 1 21 (ERR-SYS) Systematic errors were estimated to be 5 %. M0580 1 22 COMMENT Differential cross sections for the elastic scattering M0580 1 23 of tagged, monochromatic photons have been measured M0580 1 24 on a separated target of 206 Pb between 12 and 30 M0580 1 25 MeV. M0580 1 26 The interpretation of these data implies that the M0580 1 27 total photoabsorption cross section in the region of M0580 1 28 the giant dipole resonance of 206Pb is nearly M0580 1 29 identical to that of 208Pb, except shifted slightly M0580 1 30 higher in energy. Fore-to-aft ratios of differential M0580 1 31 cross sections are ambiguous as to existence of giant M0580 1 32 quadrupole resonance between 20 and 30 MeV. This M0580 1 33 ambiguity is due in part to the influence of poorly M0580 1 34 known exchange effects and in part to uncertainties M0580 1 35 in the Delbruck amplitude. Upper limits are placed M0580 1 36 on the relative photon-decay branch of the giant M0580 1 37 dipole resonance and isovector giant quadrupole M0580 1 38 resonance to the lowest 2+ and 3- states, M0580 1 39 respectively. These limits are well above those M0580 1 40 predicted by current models for the coupling of giant M0580 1 41 resonances to surface vibrations. M0580 1 42 HISTORY (19990318C) data were compiled at the USA BNL NNDC by M0580 1 43 V.V.Varlamov. M0580 1 44 (20190625A) Corrected by SD and VV: ERR-ANALYS, M0580 1 45 STATUS, DATA, SUBENTS 002 - 004 merged, lowercase. M0580 1 46 (20230614A) Corrected by V.Varlamov: COMMON in SUBENT M0580 1 47 002. M0580 1 48 ENDBIB 46 0 M0580 1 49 COMMON 1 3 M0580 1 50 ERR-SYS M0580 1 51 PER-CENT M0580 1 52 5. M0580 1 53 ENDCOMMON 3 0 M0580 1 54 ENDSUBENT 53 0 M0580 199999 SUBENT M0580002 20230614 M125M0580 2 1 BIB 3 6 M0580 2 2 REACTION (82-PB-206(G,EL)82-PB-206,,DA) M0580 2 3 STATUS (TABLE) Table 2 of Phys.Rev.,C34(1986)480. M0580 2 4 HISTORY (20190625A) Corrected by SD and VV: DATA substituted, M0580 2 5 DATA-ERR -> ERR-S. M0580 2 6 (20230614A) Corrected by V.Varlamov: COMMON -> M0580 2 7 NOCOMMON. M0580 2 8 ENDBIB 6 0 M0580 2 9 NOCOMMON 0 0 M0580 2 10 DATA 4 69 M0580 2 11 ANG EN DATA ERR-S M0580 2 12 ADEG MEV MU-B/SR MU-B/SR M0580 2 13 60. 20.9 265. 8. M0580 2 14 60. 22.22 205. 8. M0580 2 15 60. 22.35 238. 8. M0580 2 16 60. 22.80 185. 7. M0580 2 17 60. 23.42 198. 7. M0580 2 18 60. 23.95 201. 5. M0580 2 19 60. 24.09 183. 7. M0580 2 20 60. 24.77 167. 7. M0580 2 21 60. 25.53 161. 6. M0580 2 22 60. 25.80 180. 7. M0580 2 23 60. 26.20 176. 7. M0580 2 24 60. 26.31 172. 6. M0580 2 25 60. 27.15 149. 5. M0580 2 26 60. 27.25 158. 8. M0580 2 27 60. 28.95 162. 10. M0580 2 28 60. 29.80 147. 7. M0580 2 29 90. 13.82 720. 18. M0580 2 30 90. 14.17 759. 20. M0580 2 31 90. 14.54 742. 17. M0580 2 32 90. 14.94 676. 17. M0580 2 33 90. 15.35 614. 15. M0580 2 34 90. 15.80 525. 15. M0580 2 35 90. 16.27 444. 14. M0580 2 36 90. 16.77 361. 12. M0580 2 37 135. 12.49 461. 19. M0580 2 38 135. 12.79 591. 18. M0580 2 39 135. 13.12 701. 18. M0580 2 40 135. 13.47 855. 19. M0580 2 41 135. 13.82 986. 20. M0580 2 42 135. 13.86 1007. 18. M0580 2 43 135. 14.17 1011. 23. M0580 2 44 135. 14.24 1017. 17. M0580 2 45 135. 14.54 1041. 20. M0580 2 46 135. 14.64 1043. 19. M0580 2 47 135. 14.94 942. 18. M0580 2 48 135. 15.05 982. 33. M0580 2 49 135. 15.08 900. 22. M0580 2 50 135. 15.35 884. 18. M0580 2 51 135. 15.47 895. 31. M0580 2 52 135. 15.80 772. 17. M0580 2 53 135. 15.94 745. 27. M0580 2 54 135. 16.27 635. 16. M0580 2 55 135. 16.42 644. 24. M0580 2 56 135. 16.47 611. 15. M0580 2 57 135. 16.73 556. 15. M0580 2 58 135. 16.77 574. 15. M0580 2 59 135. 16.96 540. 20. M0580 2 60 135. 17.00 531. 15. M0580 2 61 135. 17.29 483. 14. M0580 2 62 135. 17.59 423. 14. M0580 2 63 135. 17.92 401. 14. M0580 2 64 135. 18.26 381. 14. M0580 2 65 135. 18.62 356. 12. M0580 2 66 135. 20.90 299. 6. M0580 2 67 135. 22.22 227. 10. M0580 2 68 135. 22.35 236. 5. M0580 2 69 135. 22.80 206. 11. M0580 2 70 135. 23.42 194. 9. M0580 2 71 135. 23.95 193. 4. M0580 2 72 135. 24.09 181. 9. M0580 2 73 135. 24.77 167. 8. M0580 2 74 135. 25.53 151. 7. M0580 2 75 135. 25.80 166. 3. M0580 2 76 135. 26.20 150. 4. M0580 2 77 135. 26.31 156. 9. M0580 2 78 135. 27.15 133. 7. M0580 2 79 135. 27.25 141. 4. M0580 2 80 135. 28.95 118. 3. M0580 2 81 135. 29.80 100. 3. M0580 2 82 ENDDATA 71 0 M0580 2 83 ENDSUBENT 82 0 M0580 299999 NOSUBENT M0580003 20190625 M101M0580 3 1 NOSUBENT M0580004 20190625 M101M0580 4 1 ENDENTRY 4 0 M058099999999