ENTRY M0575 20190625 M101M057500000001 SUBENT M0575001 20190625 M101M057500100001 BIB 13 50 M057500100002 TITLE Angular distributions for 16O(gamma,p)15N at M057500100003 intermediate energies M057500100004 AUTHOR (G.S.Adams,E.R.Kinney,J.L.Matthews,W.W.Sapp,T.Soos, M057500100005 R.O.Owens,R.S.Turley,G.Pignault) M057500100006 REFERENCE (J,PR/C,38,2771,1988) M057500100007 INSTITUTE (1USARPI,1USAMIT,2UK GLS,1USAUSC) + M057500100008 (1USAUSA) Hughes Reserch Lab,Malibu,CA,USA. M057500100009 FACILITY (LINAC,1USAMIT) The MIT-Bates Linac. M057500100010 INC-SOURCE (BRST) M057500100011 METHOD (MAGFR) The ohips qqd?? design magnetic spectrometer. M057500100012 SAMPLE A beryllium oxide target with thickness about 294 - M057500100013 512 mg/cm**2 increased as the photon energy was M057500100014 raised. M057500100015 DETECTOR (MWDC) M057500100016 ANALYSIS Cross sections were extracted from the experimental M057500100017 photoproton energy spectra by fitting four component M057500100018 for the final nucleus ground and three excited states M057500100019 plus a uniform background. The shape of each M057500100020 component in the computed proton end-point spectrum M057500100021 was determined mainly by that of the incident photon M057500100022 spectrum, but the additional contributions from the M057500100023 proton energy loss in target, the electron-beam M057500100024 energy resolution, and the spectrometer resolution M057500100025 were folded in. M057500100026 ERR-ANALYS (ERR-S) Statistical errors. M057500100027 (ERR-SYS) The systematic errors M057500100028 were estimated (in quadrature) to be 7.4 % from the M057500100029 following sources: M057500100030 (ERR-1) solid angle 0.5% M057500100031 (ERR-2) beam-current integration 1.0% M057500100032 (ERR-3) real-photon spectrum 5.0% M057500100033 (ERR-4) virtual-photon spectrum 4.0% M057500100034 (ERR-5) electron-beam and spectrometer calibration 1.% M057500100035 (ERR-6) spectrometer dispersion 0.7% M057500100036 (ERR-7) dead-time corrections 1.0% M057500100037 (ERR-8) target thickness 1.0% M057500100038 (ERR-9) radiator thickness 0.3% M057500100039 (ERR-10) nuclear interactions in detectors 3.0% M057500100040 COMMENT The photoproton knockout reaction on 16O leaving 15N M057500100041 in low-lying bound states has been observed over the M057500100042 photon energy range from 196 to 361 MeV. The angular M057500100043 distributions for the reaction populating the ground M057500100044 state of 15N develops sharp structure as photon M057500100045 energy is increased but that for population of the M057500100046 excited states is smooth. The results are not M057500100047 explained by existing theoretical models. M057500100048 HISTORY (19990316C) Data were compiled at the USA BNL NNDC by M057500100049 V.V.Varlamov. M057500100050 (20190625U) Corrected by SD and VV: TITLE, ERR-ANALYS, M057500100051 REACTION, STATUS, DATA, lowercase. M057500100052 ENDBIB 50 0 M057500100053 COMMON 11 6 M057500100054 ERR-SYS ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 M057500100055 ERR-6 ERR-7 ERR-8 ERR-9 ERR-10 M057500100056 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT M057500100057 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT M057500100058 7.4 0.5 1.0 5.0 4.0 1.0 M057500100059 0.7 1.0 1.0 0.3 3.0 M057500100060 ENDCOMMON 6 0 M057500100061 ENDSUBENT 60 0 M057500199999 SUBENT M0575002 20190625 M101M057500200001 BIB 3 4 M057500200002 REACTION (8-O-16(G,P)7-N-15,PAR,DA,,BRA) M057500200003 STATUS (TABLE) Table 1 from Phys.Rev.,C38(1988)2771. M057500200004 HISTORY (20190625U) Corrected by SD and VV: REACTION (BRS -> M057500200005 BRA), STATUS, DATA-ERR -> ERR-S. M057500200006 ENDBIB 4 0 M057500200007 COMMON 1 3 M057500200008 E-LVL M057500200009 MEV M057500200010 0.0 M057500200011 ENDCOMMON 3 0 M057500200012 DATA 4 28 M057500200013 EN-MAX ANG-CM DATA-CM ERR-S M057500200014 MEV ADEG NB/SR NB/SR M057500200015 196. 22.1 53.6 2.7 M057500200016 196. 30.6 43.5 1.9 M057500200017 196. 40.3 24.4 1.6 M057500200018 196. 51.5 15.9 1.4 M057500200019 196. 71.3 11.10 .70 M057500200020 196. 91.2 7.17 .65 M057500200021 196. 111.3 5.62 .53 M057500200022 196. 126.1 2.07 .21 M057500200023 196. 143.8 1.11 .17 M057500200024 257. 19.5 19.4 1.5 M057500200025 257. 30.8 11.1 1.1 M057500200026 257. 41.1 6.35 .47 M057500200027 257. 51.3 5.67 .43 M057500200028 257. 61.4 6.62 .56 M057500200029 257. 76.6 5.19 .33 M057500200030 257. 86.6 2.58 .24 M057500200031 312. 19.6 6.61 .60 M057500200032 312. 27.6 4.02 .41 M057500200033 312. 36.0 3.60 .28 M057500200034 312. 45.8 6.66 .44 M057500200035 312. 56.5 4.17 .36 M057500200036 312. 72.4 1.88 .19 M057500200037 361. 15.6 5.8 1.8 M057500200038 361. 20.7 2.07 .40 M057500200039 361. 26.1 3.34 .53 M057500200040 361. 31.0 3.69 .52 M057500200041 361. 36.1 4.78 .55 M057500200042 361. 41.3 4.53 .59 M057500200043 ENDDATA 30 0 M057500200044 ENDSUBENT 43 0 M057500299999 SUBENT M0575003 20190625 M101M057500300001 BIB 3 4 M057500300002 REACTION (8-O-16(G,P)7-N-15,PAR,DA,,BRA) M057500300003 STATUS (TABLE) Table 1 from Phys.Rev.,C38(1988)2771. M057500300004 HISTORY (20190625A) Corrected by SD and VV: REACTION (BRS -> M057500300005 BRA), STATUS, DATA-ERR -> ERR-S. M057500300006 ENDBIB 4 0 M057500300007 COMMON 2 3 M057500300008 E-LVL-MIN E-LVL-MAX M057500300009 MEV MEV M057500300010 5.3 6.2 M057500300011 ENDCOMMON 3 0 M057500300012 DATA 4 18 M057500300013 EN-MAX ANG-CM DATA-CM ERR-S M057500300014 MEV ADEG NB/SR NB/SR M057500300015 196. 22.1 304. 41. M057500300016 196. 30.6 409. 35. M057500300017 196. 40.3 195. 24. M057500300018 196. 51.5 113. 28. M057500300019 196. 71.3 66. 18. M057500300020 196. 91.2 32. 12. M057500300021 196. 111.3 13.3 7.4 M057500300022 257. 19.5 150. 37. M057500300023 257. 30.8 112. 29. M057500300024 257. 41.1 35.9 6.4 M057500300025 257. 51.3 17.7 5.5 M057500300026 257. 61.4 16.1 8.9 M057500300027 257. 76.6 13.2 4.6 M057500300028 312. 19.6 29.7 10.3 M057500300029 312. 27.6 43.0 7.7 M057500300030 312. 36. 29.3 4.0 M057500300031 312. 45.8 20.4 4.7 M057500300032 312. 56.5 14.0 4.2 M057500300033 ENDDATA 20 0 M057500300034 ENDSUBENT 33 0 M057500399999 ENDENTRY 3 0 M057599999999