ENTRY M0589 20111117 M061M058900000001 SUBENT M0589001 20111117 M061M058900100001 BIB 14 54 M058900100002 INSTITUTE (1CANSAS,1USAUI) + Boston University, MA,USA. M058900100003 REFERENCE (J,PR/C,52,755,1995) M058900100004 AUTHOR (R.Igarashi,J.C.Bergstrom,H.S.Caplan,K.G.E.Doss, M058900100005 E.L.Hallin,D.M.Skopik,D.Delli Carpini,E.C.Booth, M058900100006 E.K.Mcintyre,J.P.Miller,M.A.Lucas,B.E.Macgibbon, M058900100007 A.M.Nathan,D.Wells) M058900100008 TITLE Photon scattering from 12C and 4He nuclei near the M058900100009 DELTA (1232) resonance. M058900100010 FACILITY (LINAC,1CANSAS) 300 MeV linac at Saskatchevan M058900100011 Accelerator Laboratory pulse stretcher ring. M058900100012 INC-SOURCE (BRST) M058900100013 METHOD (EXTB,SITA) M058900100014 DETECTOR (NAICR) The Boston university large NaI(Tl) gamma M058900100015 spectrometer with 1.7 % resolution which is a M058900100016 26.7 cm diameter cylindrical core of NaI surrounded M058900100017 by 10.8 cm thick quadrant crystals of NaI. M058900100018 SAMPLE Two carbon targets were used, one 3.98 g/cm**2 thick, M058900100019 the other 1.6 g/cm**2. M058900100020 No information about helium target. M058900100021 ANALYSIS (AREA) M058900100022 ERR-ANALYS (ERR-S) Statistical errors. M058900100023 (ERR-1) Systematic errors the major sources of which M058900100024 were the quantameter calibration and the NaI energy M058900100025 calibration. M058900100026 COMMENT Angular distributions for photon scattering from 12C M058900100027 and 4He have been measured using continuous wave M058900100028 bremsstrahlung from the Saskatchevan Accelerator M058900100029 Laboratory pulse stretcher ring. Data for carbon M058900100030 were taken at 158.8, 195.2, 197.2, 247.2, and 290.2 M058900100031 MeV end-point energies, and for helium were taken at M058900100032 an end-point energy of 158.8 MeV. A large NaI(Tl) M058900100033 gamma ray spectrometer with 1.7 % resolution was M058900100034 used to detect scattered photons at laboratory M058900100035 scattering angles, ranging from 20 to 150 degree. M058900100036 The excellent energy resolution of the NaI detector M058900100037 allowed a separation of elastic from inelastic M058900100038 photon scattering for the first time at these M058900100039 energies. The angular distributions for elastic M058900100040 scattering are in only fair agreement with delta-hole M058900100041 theory and theory based on the optical theorem at M058900100042 forward angles, and completely disagree with theory M058900100043 at backward angles. Measured cross sections for M058900100044 inelastic scattering leading to the 4.43 MeV state M058900100045 in carbon are small compared to the elastic M058900100046 scattering at forward angles, but are dominant at M058900100047 backward angles. This experiment is the first to M058900100048 separate elastic from inelastic photon scattering M058900100049 at these energies. M058900100050 STATUS (TABLE) Data from the tables 1 - 4. M058900100051 Data were compiled at the USA BNL NNDC by M058900100052 V.Varlamov. M058900100053 HISTORY (19990326C) M058900100054 (20111117A) Corrected by V.Varlamov: AUTHOR, TITLE, M058900100055 lowercase. M058900100056 ENDBIB 54 0 M058900100057 NOCOMMON 0 0 M058900100058 ENDSUBENT 57 0 M058900199999 SUBENT M0589002 19990326 0000M058900200001 BIB 1 1 M058900200002 REACTION (6-C-12(G,INL)6-C-12,PAR,DA,,BRS) M058900200003 ENDBIB 1 0 M058900200004 COMMON 1 3 M058900200005 E-LVL M058900200006 MEV M058900200007 4.43 M058900200008 ENDCOMMON 3 0 M058900200009 DATA 5 17 M058900200010 EN ANG-CM DATA ERR-S ERR-1 M058900200011 MEV ADEG MU-B/SR MU-B/SR MU-B/SR M058900200012 154. 90.6 .0378 .0126 .0088 M058900200013 154. 120.7 .0645 .0189 .0151 M058900200014 154. 145.7 .051 .0242 .0119 M058900200015 189.4 60.8 .181 .053 .042 M058900200016 189.4 91.2 .0576 .0192 .0135 M058900200017 189.4 121.1 .0869 .0288 .0203 M058900200018 189.4 150.5 .0375 .0135 .0088 M058900200019 191.4 91. .0705 .0278 .0165 M058900200020 191.4 105.6 .149 .048 .035 M058900200021 191.4 132.4 .0498 .019 .0117 M058900200022 191.4 144.4 .067 .0248 .0157 M058900200023 239.5 105.9 .176 .101 .041 M058900200024 239.5 130.3 .0294 .0215 .0069 M058900200025 239.5 147.2 .0295 .0187 .0069 M058900200026 280.6 67.1 .235 .118 .055 M058900200027 280.6 91.1 .115 .0451 .0269 M058900200028 280.6 121.4 .0399 .0192 .0093 M058900200029 ENDDATA 19 0 M058900200030 ENDSUBENT 29 0 M058900299999 SUBENT M0589003 20111117 M061M058900300001 BIB 3 3 M058900300002 REACTION (6-C-12(G,INL)6-C-12,PAR,DA,,BRS) M058900300003 EN-SEC (E-EXC,6-C-12) M058900300004 FLAG (1.) Upper limit. M058900300005 ENDBIB 3 0 M058900300006 COMMON 1 3 M058900300007 E-EXC M058900300008 MEV M058900300009 10. M058900300010 ENDCOMMON 3 0 M058900300011 DATA 6 32 M058900300012 EN ANG-CM DATA-CM ERR-S ERR-1 FLAG M058900300013 MEV ADEG MU-B/SR MU-B/SR MU-B/SR NO-DIM M058900300014 137.1 20.2 .345 .049 .019 M058900300015 137.1 40.7 .254 .017 .014 M058900300016 137.1 60.3 .162 .006 .009 M058900300017 150.9 20.3 .418 .091 .035 M058900300018 150.9 40.7 .314 .029 .026 M058900300019 150.9 60.4 .226 .011 .019 M058900300020 172.5 19. 1.14 .11 .06 M058900300021 172.5 30.4 1.01 .07 .05 M058900300022 172.5 45.6 .63 .031 .034 M058900300023 172.5 60.8 .392 .014 .021 M058900300024 174.5 30.4 1.06 .05 .06 M058900300025 186.3 19. 1.82 .2 .15 M058900300026 186.3 30.5 1.42 .11 .12 M058900300027 186.3 45.7 .887 .054 .075 M058900300028 186.3 60.8 .423 .022 .036 M058900300029 188.3 30.5 1.7 .09 .14 M058900300030 225.6 20.4 7.95 .43 .043 M058900300031 225.6 30.7 4.79 .2 .26 M058900300032 225.6 45.9 2.3 .12 .12 M058900300033 225.6 60.9 .668 .029 .036 M058900300034 236.4 20.4 13.5 .8 1.1 M058900300035 236.4 30.7 6.21 .36 .52 M058900300036 236.4 45.9 2.64 .19 .22 M058900300037 236.4 61. .687 .046 .058 M058900300038 271.1 20.5 14.1 1.3 .8 M058900300039 271.1 30.8 8.23 .47 .44 M058900300040 271.1 46. 2.46 .15 .13 M058900300041 271.1 67. .297 1. M058900300042 277.5 20.5 17.7 1.5 1.5 M058900300043 277.5 30.8 9.03 .51 .76 M058900300044 277.5 46. 2.98 .17 .25 M058900300045 277.5 67. .173 1. M058900300046 ENDDATA 34 0 M058900300047 ENDSUBENT 46 0 M058900399999 SUBENT M0589004 20111117 M061M058900400001 BIB 1 1 M058900400002 REACTION (6-C-12(G,EL)6-C-12,,DA,,BRS) M058900400003 ENDBIB 1 0 M058900400004 NOCOMMON 0 0 M058900400005 DATA 6 35 M058900400006 EN ANG-CM DATA-CM ERR-S ERR-1 DATA-MAX M058900400007 MEV ADEG MU-B/SR MU-B/SR MU-B/SR MU-B/SR M058900400008 154. 20.3 .454 .236 .061 M058900400009 154. 40.7 .41 .075 .055 M058900400010 154. 60.4 .272 .085 .036 M058900400011 154. 90.6 .18 .017 .024 M058900400012 154. 120.7 .12 .012 .016 M058900400013 154. 145.7 .0976 .0123 .0131 M058900400014 189.4 19. 2.26 .39 .3 M058900400015 189.4 30.5 1.23 .21 .16 M058900400016 189.4 45.7 .841 .12 .113 M058900400017 189.4 60.8 .364 .045 .049 M058900400018 189.4 91.2 .0695 .0054 .0093 M058900400019 189.4 121.1 .0273 .0075 .0037 M058900400020 189.4 150.5 .00565 .00296 .00076 M058900400021 191.4 30.5 1.74 .21 .23 M058900400022 191.4 91. .115 .013 .015 M058900400023 191.4 105.6 .0337 .0138 .0045 M058900400024 191.4 132.4 .0274 .0064 .0037 M058900400025 191.4 144.4 .0146 .0053 .002 M058900400026 239.5 20.4 14.3 1.8 1.9 M058900400027 239.5 30.7 6.78 .79 .91 M058900400028 239.5 46. 2.96 .46 .4 M058900400029 239.5 61. .691 .109 .093 M058900400030 239.5 92.2 .327 .1 .077 M058900400031 239.5 105.9 .0952 M058900400032 239.5 120.7 .0867 M058900400033 239.5 130.2 .0479 M058900400034 239.5 130.3 .0393 .015 .0053 M058900400035 239.5 147.2 .0378 .0146 .0051 M058900400036 280.6 20.5 15.6 3.7 2.1 M058900400037 280.6 30.9 7.89 1.18 1.06 M058900400038 280.6 46. 3.29 .4 .44 M058900400039 280.6 67.1 .123 M058900400040 280.6 91.1 .0821 M058900400041 280.6 121.4 .0431 M058900400042 280.6 145.4 .0140 M058900400043 ENDDATA 37 0 M058900400044 ENDSUBENT 43 0 M058900499999 SUBENT M0589005 19990326 0000M058900500001 BIB 1 1 M058900500002 REACTION (2-HE-4(G,EL)2-HE-4,,DA,,BRS) M058900500003 ENDBIB 1 0 M058900500004 COMMON 1 3 M058900500005 EN M058900500006 MEV M058900500007 140.5 M058900500008 ENDCOMMON 3 0 M058900500009 DATA 4 6 M058900500010 ANG-CM DATA ERR-S ERR-1 M058900500011 ADEG MU-B/SR MU-B/SR MU-B/SR M058900500012 20.8 .0421 .009 .0019 M058900500013 41.6 .0282 .0027 .0012 M058900500014 62.8 .0215 .002 .0009 M058900500015 92. .0435 .0031 .0019 M058900500016 121.8 .071 .006 .003 M058900500017 146.5 .113 .006 .005 M058900500018 ENDDATA 8 0 M058900500019 ENDSUBENT 18 0 M058900599999 ENDENTRY 5 0 M058999999999