ENTRY 20897 20230413 231620897 0 1 SUBENT 20897001 20230413 231620897 1 1 BIB 13 31 20897 1 2 TITLE (n,alpha) reaction on C-12 induced by 14.1 MeV 20897 1 3 neutrons 20897 1 4 AUTHOR (H.Kitazawa, N.Yamamuro) 20897 1 5 REFERENCE (J,JPJ,26,600,1969) 20897 1 6 INSTITUTE (2JPNTIT) 20897 1 7 FACILITY (CCW,2JPNTIT) At 250 keV. 20897 1 8 INC-SOURCE (D-T) Neutron yield about 5x10**8 /sec 20897 1 9 SAMPLE Polyethylene foil 2x2 cm2 in area and 1.3 mg/cm2 20897 1 10 in thickness supported on a tantalum foil. 20897 1 11 METHOD Direct detection of emitted alphas using pulse 20897 1 12 shape discrimination to reject other charged 20897 1 13 particles. 20897 1 14 DETECTOR (CSICR) Harshow CsI(Tl) scintillator, 20 mm in diam. 20897 1 15 and 0.4 mm thick, used as primary detector. 20897 1 16 Energy calibration of detector made with Po 20897 1 17 and Th sources. Energy resolution about 11% 20897 1 18 for 5.3 MeV alphas. 20897 1 19 (LONGC) BF3 long counter calibrated with a Pu-Be 20897 1 20 source, and- 20897 1 21 (SCIN ) plastic scintillator were used monitor the 20897 1 22 neutron flux. 20897 1 23 MONITOR (1-H-3(D,N)2-HE-4,,DA) Associated alphas monitored 20897 1 24 to give absolute neutron yield. 20897 1 25 CORRECTION Differential cross section corrected for attenuation 20897 1 26 of neutrons in the wall of the reaction chamber and 20897 1 27 in the source assembly. 20897 1 28 ERR-ANALYS (DATA-ERR) Statistical errors and angular resolution 20897 1 29 function of sample-detector. 20897 1 30 HISTORY (19790508C) 20897 1 31 (20230413A) SD: Updated to new date formats,lower case.20897 1 32 Corrections in all Subents. 20897 1 33 ENDBIB 31 0 20897 1 34 NOCOMMON 0 0 20897 1 35 ENDSUBENT 34 0 20897 199999 SUBENT 20897002 20230413 231620897 2 1 BIB 4 10 20897 2 2 REACTION (6-C-12(N,A)4-BE-9,PAR,DA) 20897 2 3 Only the transition to the ground state was measured 20897 2 4 because of contamination of lower energy alphas by 20897 2 5 those from the C-12(n,3a) reaction. 20897 2 6 COMMENT The angular distribution shows peaking around 40 deg 20897 2 7 analysed in terms of pick-up and knock-on models, 20897 2 8 and at backward angles analysed in terms of a heavy 20897 2 9 particle stripping model. 20897 2 10 STATUS (CURVE) fig. 7 from J.Phys.Soc.,Jap.,26(1969)600 20897 2 11 HISTORY (20230413A) SD: Data were digitized. 20897 2 12 ENDBIB 10 0 20897 2 13 COMMON 4 3 20897 2 14 EN E-LVL ANG-ERR-D ERR-DIG 20897 2 15 MEV MEV ADEG MB/SR 20897 2 16 14.1 0.0 0.2 0.02 20897 2 17 ENDCOMMON 3 0 20897 2 18 DATA 4 11 20897 2 19 ANG-CM ANG-ERR DATA-CM DATA-ERR 20897 2 20 ADEG ADEG MB/SR MB/SR 20897 2 21 19.8 9.3 7.79 0.53 20897 2 22 30.2 9.9 11.86 0.94 20897 2 23 39.4 13.3 12.51 1.06 20897 2 24 48.2 14.5 9.09 0.59 20897 2 25 58.7 10.4 5.37 0.53 20897 2 26 72.6 12.2 6.08 1.53 20897 2 27 83.7 10.4 5.91 1.59 20897 2 28 105.2 11.0 3.38 1.65 20897 2 29 125.5 9.9 4.50 1.06 20897 2 30 139.3 9.9 7.40 2.36 20897 2 31 167.7 7.0 9.76 3.72 20897 2 32 ENDDATA 13 0 20897 2 33 ENDSUBENT 32 0 20897 299999 SUBENT 20897003 20230413 231620897 3 1 BIB 3 7 20897 3 2 REACTION (6-C-12(N,A)4-BE-9,PAR,SIG) 20897 3 3 Only the transition to the ground state was measured 20897 3 4 because of contamination of lower energy alphas by 20897 3 5 those from the C-12(n,3a) reaction. 20897 3 6 STATUS (TABLE) Table 1 from J.Phys.Soc.,Jap.,26(1969)600 20897 3 7 (DEP,20897002) Angl.distrib. 20897 3 8 HISTORY (20230413U) SD: BIB updated. 20897 3 9 ENDBIB 7 0 20897 3 10 NOCOMMON 0 0 20897 3 11 DATA 4 1 20897 3 12 EN E-LVL DATA DATA-ERR 20897 3 13 MEV MEV MB MB 20897 3 14 14.1 0. 76. 11. 20897 3 15 ENDDATA 3 0 20897 3 16 ENDSUBENT 15 0 20897 399999 ENDENTRY 3 0 2089799999999