ENTRY M0331 20180217 M095M033100000001 SUBENT M0331001 20180217 M095M033100100001 BIB 14 44 M033100100002 TITLE Energy distribution of fast photoneutrons from lead. M033100100003 AUTHOR (H.Breuer) M033100100004 REFERENCE (J,ZN/A,17,584,1962) in German M033100100005 INSTITUTE (2GERGER) Max-Plank-Institut fuer Biophysik, M033100100006 Frankfurt. M033100100007 FACILITY (BETAT,2GERGER) The pulse length at 32.5 MeV M033100100008 end-point energy was 300-400 microsec. The frequency M033100100009 was 50 pulses per second. M033100100010 INC-SOURCE (BRST) The diameter of the gamma beam at the place of M033100100011 the sample was equal to 5 cm. The intensity of gamma M033100100012 irradiation at the distance of 1 m from the M033100100013 bremsstrahlung target was 300 erg/(cm2*sec). M033100100014 SAMPLE The disk of lead (thickness = 8 mm, diameter = 5 cm) M033100100015 was oriented at 45 degrees to the beam direction. M033100100016 METHOD (EXTB) M033100100017 DETECTOR (SCIN) 2 mm thick Li-I crystal of 1*1/2 in**2 size M033100100018 screened by 12 mm thick lead shield. M033100100019 CORRECTION The data were corrected for: M033100100020 (a) the cross section of Li-6(n,alpha) reaction; M033100100021 (b) the nonelastic scattering of neutrons within the M033100100022 target and the lead screen; M033100100023 (c) the scattering of neutrons within the quartz ligh M033100100024 conductor; M033100100025 (d) the background. M033100100026 The neutron scattering on the walls of detector and M033100100027 elastic scattering of neutrons within the target and M033100100028 the screen were negligible. M033100100029 ERR-ANALYS (DATA-ERR) No information about source of M033100100030 uncertainties. M033100100031 ADD-RES (THEO) Statistical model calculations of photoneutron M033100100032 spectra were made for some values of level-density M033100100033 parameter and nuclear temperature. M033100100034 (COMP) Experimental data were compared with M033100100035 predictions of evaporation theory and Wilkinson's M033100100036 model of direct photoeffect. M033100100037 COMMENT The fraction of direct photoneutrons was equal to 11%. M033100100038 HISTORY (19890519C) Data were compiled in SCJAD of Saratov M033100100039 State University. M033100100040 (19910202A) Corrected by V.Varlamov, V.Mclane. M033100100041 (19981116A) Corrected by V.Varlamov. M033100100042 A used in PART-DET of Subent 1. M033100100043 (20180217U) Corrected by SD VV: Updated to new date M033100100044 formats, lower case, STATUS moved to SUBENTs 002, M033100100045 003, PART-DET deleted, REACTION. M033100100046 ENDBIB 44 0 M033100100047 COMMON 2 3 M033100100048 ANG EN-MAX M033100100049 ADEG MEV M033100100050 90. 32.5 M033100100051 ENDCOMMON 3 0 M033100100052 ENDSUBENT 51 0 M033100199999 SUBENT M0331002 20180217 M095M033100200001 BIB 3 4 M033100200002 REACTION (82-PB-0(G,X)0-NN-1,,DA/DE,,BRA/REL) M033100200003 STATUS (CURVE) Data from Fig. 7 of ZN/A,17,584,1962. M033100200004 HISTORY (20180217U) Corrected by SD VV: STATUS, REACTION: M033100200005 BRS -> BRA. M033100200006 ENDBIB 4 0 M033100200007 NOCOMMON 0 0 M033100200008 DATA 3 40 M033100200009 E DATA DATA-ERR M033100200010 MEV ARB-UNITS ARB-UNITS M033100200011 0.2 1.60 0.77 M033100200012 0.3 1.29 0.31 M033100200013 0.6 3.60 0.18 M033100200014 0.9 3.87 0.09 M033100200015 1.1 3.76 0.10 M033100200016 1.3 3.54 0.10 M033100200017 1.5 3.36 0.10 M033100200018 1.7 3.06 0.06 M033100200019 1.9 2.76 0.05 M033100200020 2.2 2.50 0.06 M033100200021 2.4 2.24 0.05 M033100200022 2.6 2.01 0.08 M033100200023 2.9 1.90 0.04 M033100200024 3.1 1.77 0.06 M033100200025 3.3 1.58 0.04 M033100200026 3.5 1.43 0.04 M033100200027 3.8 1.29 0.04 M033100200028 4.0 1.16 0.04 M033100200029 4.2 1.08 0.06 M033100200030 4.4 0.97 0.06 M033100200031 4.7 0.86 0.06 M033100200032 4.9 0.77 0.05 M033100200033 5.1 0.64 0.06 M033100200034 5.4 0.55 0.06 M033100200035 5.6 0.58 0.06 M033100200036 5.8 0.52 0.05 M033100200037 6.0 0.36 0.05 M033100200038 6.3 0.35 0.06 M033100200039 6.5 0.34 0.08 M033100200040 6.7 0.26 0.06 M033100200041 6.9 0.21 0.05 M033100200042 7.2 0.21 0.06 M033100200043 7.4 0.13 0.04 M033100200044 7.6 0.11 0.04 M033100200045 7.9 0.16 0.05 M033100200046 8.1 0.09 0.05 M033100200047 8.3 0.10 0.06 M033100200048 8.6 0.09 0.05 M033100200049 8.8 0.04 0.03 M033100200050 9.0 0.03 0.03 M033100200051 ENDDATA 42 0 M033100200052 ENDSUBENT 51 0 M033100299999 SUBENT M0331003 20180217 M095M033100300001 BIB 4 9 M033100300002 REACTION (82-PB-0(G,X)0-NN-1,DI,DA/DE,,BRA/REL) M033100300003 Energy spectrum of direct photoneutrons. M033100300004 ANALYSIS The energy spectrum of direct photoneutrons is a M033100300005 difference between experimental spectrum and M033100300006 evaporation model calculation. M033100300007 STATUS (DEP,M0331002) M033100300008 (CURVE) Data from Fig. 8 of ZN/A,17,584,1962. M033100300009 HISTORY (20180217U) Corrected by SD VV: STATUS, REACTION: M033100300010 BRS -> BRA. M033100300011 ENDBIB 9 0 M033100300012 NOCOMMON 0 0 M033100300013 DATA 3 29 M033100300014 E DATA DATA-ERR M033100300015 MEV ARB-UNITS ARB-UNITS M033100300016 2.6 4.17 8.75 M033100300017 2.9 12.08 7.92 M033100300018 3.1 20.00 8.54 M033100300019 3.3 22.08 7.92 M033100300020 3.5 24.58 7.92 M033100300021 3.8 27.08 7.92 M033100300022 4.0 29.58 7.92 M033100300023 4.2 35.00 8.54 M033100300024 4.4 31.67 8.54 M033100300025 4.7 35.42 8.54 M033100300026 4.9 35.42 8.33 M033100300027 5.1 30.21 8.54 M033100300028 5.4 25.62 8.54 M033100300029 5.6 31.88 8.54 M033100300030 5.8 32.08 8.33 M033100300031 6.0 17.92 8.33 M033100300032 6.3 21.88 8.54 M033100300033 6.5 22.92 8.75 M033100300034 6.7 16.67 8.54 M033100300035 6.9 13.75 8.33 M033100300036 7.2 14.79 8.54 M033100300037 7.4 7.08 7.92 M033100300038 7.6 6.88 7.92 M033100300039 7.9 11.04 8.33 M033100300040 8.1 6.25 8.33 M033100300041 8.3 7.71 8.54 M033100300042 8.6 7.71 8.33 M033100300043 8.8 5.83 7.50 M033100300044 9.0 3.33 7.50 M033100300045 ENDDATA 31 0 M033100300046 ENDSUBENT 45 0 M033100399999 ENDENTRY 3 0 M033199999999