ENTRY M0584 20190625 M101M058400000001 SUBENT M0584001 20190625 M101M058400100001 BIB 12 32 M058400100002 TITLE Photon scattering from 12C and 208Pb in the M058400100003 delta-region. M058400100004 AUTHOR (E.Hayward,B.Ziegler) M058400100005 REFERENCE (J,NP/A,414,333,1984) M058400100006 INSTITUTE (2GERMNZ) M058400100007 FACILITY (LINAC,2GERMNZ) M058400100008 INC-SOURCE (BRST) M058400100009 METHOD (EXTB,SITA) M058400100010 DETECTOR (NAICR) NaI(Tl) detector, 35.6 cm in length and M058400100011 25.4 cm in diameter. M058400100012 ANALYSIS Direct scattered photon detection. M058400100013 ERR-ANALYS (ERR-S) The standard deviations based on M058400100014 the number of counts. M058400100015 (EN-ERR) Energy band over which the cross section was M058400100016 measured. M058400100017 COMMENT The photon scattering cross sections at 115 degree M058400100018 for 12C and 208Pb have been measured using M058400100019 Bremsstrahlung energies Egamma of 150, 200, 250, 300, M058400100020 350, and 400 MeV. Scattered photons having M058400100021 energies in the range 0.9E to E were accepted M058400100022 by the detector. The measured cross sections are M058400100023 much larger than the prediction of a simple model M058400100024 relating the scattering cross section at a large M058400100025 angle to the forward scattering cross section and M058400100026 the form factor for elastic electron scattering. M058400100027 This discrepancy was discussed in terms of M058400100028 collective effects, inelastic scattering, or M058400100029 exchange-current distributions. M058400100030 HISTORY (19990324C) Data were compiled at the USA BNL NNDC by M058400100031 V.V.Varlamov. M058400100032 (20190625U) Corrected by SD and VV: ERR-ANALYS, STATUS,M058400100033 SAMPLE, DATA, COMMON (ANG), lowercase. M058400100034 ENDBIB 32 0 M058400100035 COMMON 2 3 M058400100036 ANG EN-ERR M058400100037 ADEG PER-CENT M058400100038 115. 10. M058400100039 ENDCOMMON 3 0 M058400100040 ENDSUBENT 39 0 M058400199999 SUBENT M0584002 20190625 M101M058400200001 BIB 4 5 M058400200002 REACTION (6-C-12(G,EL)6-C-12,,DA,,BRS) M058400200003 SAMPLE Natural carbon (3.56 mg/cm**2 thick) M058400200004 STATUS (TABLE) Tables 1, 2 of Nucl.Phys.,A414(1984)333. M058400200005 HISTORY (20190625U) Corrected by SD and VV: SAMPLE, STATUS, M058400200006 DATA-ERR -> ERR-S. M058400200007 ENDBIB 5 0 M058400200008 NOCOMMON 0 0 M058400200009 DATA 3 6 M058400200010 EN DATA ERR-S M058400200011 MEV MB/SR MB/SR M058400200012 150. 7.26E-5 2.46E-5 M058400200013 200. 8.66E-5 2.22E-5 M058400200014 250. 1.646E-4 2.26E-5 M058400200015 300. 1.808E-4 7.86E-5 M058400200016 350. 1.254E-4 3.14E-5 M058400200017 400. 2.26E-5 3.06E-5 M058400200018 ENDDATA 8 0 M058400200019 ENDSUBENT 18 0 M058400299999 SUBENT M0584003 20190625 M101M058400300001 BIB 4 5 M058400300002 REACTION (82-PB-0(G,EL)82-PB-0,,DA,,BRS) M058400300003 SAMPLE Natural carbon lead (1.826 g/cm**2 thick) target. M058400300004 STATUS (TABLE) Tables 1, 2 of Nucl.Phys.,A414(1984)333. M058400300005 HISTORY (20190625U) Corrected by SD and VV: SAMPLE, STATUS, M058400300006 DATA-ERR -> ERR-S. M058400300007 ENDBIB 5 0 M058400300008 NOCOMMON 0 0 M058400300009 DATA 3 6 M058400300010 EN DATA ERR-S M058400300011 MEV MB/SR MB/SR M058400300012 150. -3.04E-4 7.84E-4 M058400300013 200. 5.68E-4 4.98E-4 M058400300014 250. 8.34E-4 4.5E-4 M058400300015 300. 2.14E-3 1.88E-3 M058400300016 350. 1.94E-3 8.46E-4 M058400300017 400. 2.72E-4 5.04E-4 M058400300018 ENDDATA 8 0 M058400300019 ENDSUBENT 18 0 M058400399999 ENDENTRY 3 0 M058499999999