ENTRY M0560 20100127 M051M056000000001 SUBENT M0560001 20100127 M051M056000100001 BIB 13 37 M056000100002 INSTITUTE (2GERGOE,2SWDLND,1USADKE,2SWDUPP) M056000100003 REFERENCE (J,NP/A,548,579,1992) M056000100004 AUTHOR (K.FUHRBERG,G.MARTIN,D.HAGER,M.LUDWIG, M056000100005 M.SCHUMACHER,B.-E.ANDERSSON,K.I.BLOMQVIST,H.RUIJTER, M056000100006 A.SANDELL,B.SCHRODER,E.HAYWARD,L.NILSSON,R.ZORRO) M056000100007 TITLE Compton scattering by mesons in nuclei: experiment on M056000100008 Pb-208. M056000100009 FACILITY (MICRT,2SWDLND) MAX stretcher ring in LUND. M056000100010 INC-SOURCE (TAGD) Tagged photons. M056000100011 METHOD (EXTB,SITA)) M056000100012 DETECTOR (NAICR) Three high-resolution NaI(Tl) detectors, two M056000100013 having dimensions of 10" diameter by 10" and one - M056000100014 10" diameter by 14". M056000100015 SAMPLE A block of 918 g of Pb containing 87 % 208Pb. M056000100016 ERR-ANALYS (DATA-ERR) The quated experimental errors take into M056000100017 account the statistical errors based on the numbers M056000100018 of scattered photons, the errors due to the tagging M056000100019 efficiency and errors due to the electron count M056000100020 rates of the focal-plane detectors. M056000100021 COMMENT Using 58 and 73 MeV tagged photons and scattering M056000100022 angles from 60 to 150 degree, it was shown that it M056000100023 is possible to observe compton scattering by "mesons M056000100024 in nuclei" through an incomplete cancellation of the M056000100025 mesonic (eschange-current) seagull amplitude by M056000100026 parts of the nuclear resonance amplitude related to M056000100027 the giant-dipole resonance of 208Pb. This phenomenon M056000100028 is a property of an extended nucleus and, therefore, M056000100029 cannot be studied on the deuteron. Predictions of M056000100030 the exchange form factor which determines the M056000100031 angular distribution of the exchange Seagull M056000100032 amplitude are compared with experimental data. M056000100033 STATUS (TABLE) Data from the Table 1. M056000100034 Data were compiled at the USA BNL NNDC by M056000100035 V.V.Varlamov. M056000100036 HISTORY (19990308C) M056000100037 (20091001A) Correction of AUTHOR - E.HAYWARD, M056000100038 lowercase. M056000100039 ENDBIB 37 0 M056000100040 NOCOMMON 0 0 M056000100041 ENDSUBENT 40 0 M056000199999 SUBENT M0560002 19990308 0000M056000200001 BIB 1 1 M056000200002 REACTION (82-PB-208(G,EL)82-PB-208,,DA) M056000200003 ENDBIB 1 0 M056000200004 NOCOMMON 0 0 M056000200005 DATA 4 6 M056000200006 EN ANG DATA DATA-ERR M056000200007 MEV ADEG MU-B/SR MU-B/SR M056000200008 58. 60. 54. 2. M056000200009 58. 90. 21. 1. M056000200010 58. 150. 4.2 .6 M056000200011 75. 63. 16. 3. M056000200012 75. 127. .5 .4 M056000200013 75. 154. .6 .4 M056000200014 ENDDATA 8 0 M056000200015 ENDSUBENT 14 0 M056000299999 ENDENTRY 2 0 M056099999999