ENTRY M0490 20130625 M067M049000000001 SUBENT M0490001 20130625 M067M049000100001 BIB 16 39 M049000100002 TITLE Absolute C-12(g,p0)B-11 cross section and angular M049000100003 distributions in the giant dipole resonance region. M049000100004 AUTHOR (E.Kerkhove,P.Berkvens,R.Van De Vyver,D.Ryckbosch, M049000100005 P.Van Otten,H.Ferdinande,E.Van Camp,A.De Graeve) M049000100006 REFERENCE (J,PR/C,33,1796,1986) M049000100007 #doi:10.1103/PhysRevC.33.1796 M049000100008 INSTITUTE (2BLGGHT) M049000100009 FACILITY (LINAC,2BLGGHT) M049000100010 INC-SOURCE (BRST,HARD) Bremsstrahlung beam was hardened by a M049000100011 19.5 cm thick graphite cylinder. M049000100012 METHOD (EXTB) M049000100013 DETECTOR (SOLST) 3 mm thick Si(Li) detectors. M049000100014 SAMPLE As a target, a 3.39 mg/cm**2 thick polystyrene foil M049000100015 C(8)H(8)n was used. M049000100016 PART-DET (P) M049000100017 ANALYSIS (PHDIF) As in the residual nucleus B-11 the first M049000100018 excited state is located at energy 2.12 MeV, the M049000100019 cross section of (g,p0) reaction was deduced M049000100020 straightforwardly from the measured photoproton M049000100021 spectra, taken at three bremsstrahlung end-point M049000100022 energies 25, 27, and 29 MeV simultaneously at seven M049000100023 angles varying between 37 and 143 degrees. M049000100024 Then the spectra were used to obtain the M049000100025 integrated-over-angles cross section by using M049000100026 Shiff's bremsstrahlung spectrum expression. M049000100027 ERR-ANALYS (ERR-S) The statistical errors. M049000100028 (ERR-1) The systematic error was estimated to be about M049000100029 of 12%. M049000100030 COMMENT The absolute differential cross sections for the M049000100031 reaction C-12(g,p0)B-11 were measured at seven M049000100032 angles in the energy region between 21 and 29 MeV. M049000100033 using a standard legendre polynomial expansion, the M049000100034 total integrated-over-angles absolute C-12(g,p0) M049000100035 cross section was derived. M049000100036 EN-SEC (E-LVL,5-B-11) M049000100037 STATUS (CURVE) M049000100038 HISTORY (19910218C) M049000100039 (20130625A) Corrected by V.Varlamov: ERR-ANALYS, M049000100040 REACTION, dates, lowercase. M049000100041 ENDBIB 39 0 M049000100042 COMMON 2 3 M049000100043 E-LVL ERR-1 M049000100044 MEV PER-CENT M049000100045 0.0 12. M049000100046 ENDCOMMON 3 0 M049000100047 ENDSUBENT 46 0 M049000199999 SUBENT M0490002 20130625 M067M049000200001 BIB 2 2 M049000200002 REACTION (6-C-12(G,P)5-B-11,PAR,SIG,,BRS) M049000200003 HISTORY (20130625A) Corrected by V.Varlamov: BRA -> BRS. M049000200004 ENDBIB 2 0 M049000200005 NOCOMMON 0 0 M049000200006 DATA 3 83 M049000200007 EN DATA ERR-S M049000200008 MEV MB MB M049000200009 20.5 3.9 .1 M049000200010 20.6 4.45 .1 M049000200011 20.7 4.55 .1 M049000200012 20.8 4.7 .1 M049000200013 20.9 5.1 .1 M049000200014 21. 5.5 .1 M049000200015 21.1 5.95 .1 M049000200016 21.2 6.1 .1 M049000200017 21.3 6.5 .1 M049000200018 21.4 6.6 .1 M049000200019 21.5 6.55 .1 M049000200020 21.6 7.2 .1 M049000200021 21.7 7.8 .1 M049000200022 21.8 8.3 .1 M049000200023 21.9 8.8 .2 M049000200024 22. 9.5 .2 M049000200025 22.1 9.3 .2 M049000200026 22.2 10. .2 M049000200027 22.3 10.3 .2 M049000200028 22.4 10.05 .2 M049000200029 22.5 10.8 .15 M049000200030 22.6 10.95 .15 M049000200031 22.7 10.55 .15 M049000200032 22.8 10.55 .15 M049000200033 22.9 10.6 .15 M049000200034 23. 10.45 .15 M049000200035 23.1 10.2 .1 M049000200036 23.2 10.05 .1 M049000200037 23.3 9.8 .1 M049000200038 23.4 9.85 .1 M049000200039 23.5 9.5 .1 M049000200040 23.6 9.2 .1 M049000200041 23.7 9.55 .1 M049000200042 23.8 8.8 .1 M049000200043 23.9 8.3 .1 M049000200044 24. 7.9 .1 M049000200045 24.1 6.9 .1 M049000200046 24.2 6.5 .1 M049000200047 24.3 6. .05 M049000200048 24.4 5.2 .05 M049000200049 24.5 5.1 .05 M049000200050 24.6 4.9 .05 M049000200051 24.7 4.85 .05 M049000200052 24.8 5. .05 M049000200053 24.9 5.4 .05 M049000200054 25. 5.5 .05 M049000200055 25.1 5.55 .05 M049000200056 25.2 5.7 .05 M049000200057 25.3 5.6 .05 M049000200058 25.4 5.7 .05 M049000200059 25.5 5.4 .05 M049000200060 25.6 5.3 .05 M049000200061 25.7 5.2 .05 M049000200062 25.8 5. .05 M049000200063 25.9 4.65 .05 M049000200064 26. 4.5 .05 M049000200065 26.1 4.45 .05 M049000200066 26.2 4.4 .05 M049000200067 26.3 4.3 .05 M049000200068 26.4 4.1 .05 M049000200069 26.5 3.9 .05 M049000200070 26.6 3.7 .05 M049000200071 26.7 3.45 .05 M049000200072 26.8 3.2 .05 M049000200073 27. 3.1 .05 M049000200074 27.1 3.15 .05 M049000200075 27.2 3.15 .05 M049000200076 27.3 3.2 .05 M049000200077 27.4 3.05 .05 M049000200078 27.5 2.8 .03 M049000200079 27.6 3. .03 M049000200080 27.7 2.8 .03 M049000200081 27.8 2.75 .03 M049000200082 27.9 2.6 .02 M049000200083 28. 2.5 .02 M049000200084 28.1 2.6 .02 M049000200085 28.2 2.75 .02 M049000200086 28.3 2.55 .02 M049000200087 28.4 2.2 .02 M049000200088 28.5 2.1 .02 M049000200089 28.6 2.25 .02 M049000200090 28.7 1.8 .02 M049000200091 28.8 1.6 .02 M049000200092 ENDDATA 85 0 M049000200093 ENDSUBENT 92 0 M049000299999 ENDENTRY 2 0 M049099999999