ENTRY 20897 20230413 2089700000001 SUBENT 20897001 20230413 20231011 2089700100001 BIB 13 31 2089700100002 TITLE (n,alpha) reaction on C-12 induced by 14.1 MeV 2089700100003 neutrons 2089700100004 AUTHOR (H.Kitazawa, N.Yamamuro) 2089700100005 REFERENCE (J,JPJ,26,600,1969) 2089700100006 INSTITUTE (2JPNTIT) 2089700100007 FACILITY (CCW,2JPNTIT) At 250 keV. 2089700100008 INC-SOURCE (D-T) Neutron yield about 5x10**8 /sec 2089700100009 SAMPLE Polyethylene foil 2x2 cm2 in area and 1.3 mg/cm2 2089700100010 in thickness supported on a tantalum foil. 2089700100011 METHOD Direct detection of emitted alphas using pulse 2089700100012 shape discrimination to reject other charged 2089700100013 particles. 2089700100014 DETECTOR (CSICR) Harshow CsI(Tl) scintillator, 20 mm in diam. 2089700100015 and 0.4 mm thick, used as primary detector. 2089700100016 Energy calibration of detector made with Po 2089700100017 and Th sources. Energy resolution about 11% 2089700100018 for 5.3 MeV alphas. 2089700100019 (LONGC) BF3 long counter calibrated with a Pu-Be 2089700100020 source, and- 2089700100021 (SCIN ) plastic scintillator were used monitor the 2089700100022 neutron flux. 2089700100023 MONITOR (1-H-3(D,N)2-HE-4,,DA) Associated alphas monitored 2089700100024 to give absolute neutron yield. 2089700100025 CORRECTION Differential cross section corrected for attenuation 2089700100026 of neutrons in the wall of the reaction chamber and 2089700100027 in the source assembly. 2089700100028 ERR-ANALYS (DATA-ERR) Statistical errors and angular resolution 2089700100029 function of sample-detector. 2089700100030 HISTORY (19790508C) 2089700100031 (20230413A) SD: Updated to new date formats,lower case.2089700100032 Corrections in all Subents. 2089700100033 ENDBIB 31 0 2089700100034 NOCOMMON 0 0 2089700100035 ENDSUBENT 34 0 2089700199999 SUBENT 20897002 20230413 20231011 2089700200001 BIB 4 10 2089700200002 REACTION (6-C-12(N,A)4-BE-9,PAR,DA) 2089700200003 Only the transition to the ground state was measured 2089700200004 because of contamination of lower energy alphas by 2089700200005 those from the C-12(n,3a) reaction. 2089700200006 COMMENT The angular distribution shows peaking around 40 deg 2089700200007 analysed in terms of pick-up and knock-on models, 2089700200008 and at backward angles analysed in terms of a heavy 2089700200009 particle stripping model. 2089700200010 STATUS (CURVE) fig. 7 from J.Phys.Soc.,Jap.,26(1969)600 2089700200011 HISTORY (20230413A) SD: Data were digitized. 2089700200012 ENDBIB 10 0 2089700200013 COMMON 4 3 2089700200014 EN E-LVL ANG-ERR-D ERR-DIG 2089700200015 MEV MEV ADEG MB/SR 2089700200016 14.1 0.0 0.2 0.02 2089700200017 ENDCOMMON 3 0 2089700200018 DATA 4 11 2089700200019 ANG-CM ANG-ERR DATA-CM DATA-ERR 2089700200020 ADEG ADEG MB/SR MB/SR 2089700200021 19.8 9.3 7.79 0.53 2089700200022 30.2 9.9 11.86 0.94 2089700200023 39.4 13.3 12.51 1.06 2089700200024 48.2 14.5 9.09 0.59 2089700200025 58.7 10.4 5.37 0.53 2089700200026 72.6 12.2 6.08 1.53 2089700200027 83.7 10.4 5.91 1.59 2089700200028 105.2 11.0 3.38 1.65 2089700200029 125.5 9.9 4.50 1.06 2089700200030 139.3 9.9 7.40 2.36 2089700200031 167.7 7.0 9.76 3.72 2089700200032 ENDDATA 13 0 2089700200033 ENDSUBENT 32 0 2089700299999 SUBENT 20897003 20230413 20231011 2089700300001 BIB 3 7 2089700300002 REACTION (6-C-12(N,A)4-BE-9,PAR,SIG) 2089700300003 Only the transition to the ground state was measured 2089700300004 because of contamination of lower energy alphas by 2089700300005 those from the C-12(n,3a) reaction. 2089700300006 STATUS (TABLE) Table 1 from J.Phys.Soc.,Jap.,26(1969)600 2089700300007 (DEP,20897002) Angl.distrib. 2089700300008 HISTORY (20230413U) SD: BIB updated. 2089700300009 ENDBIB 7 0 2089700300010 NOCOMMON 0 0 2089700300011 DATA 4 1 2089700300012 EN E-LVL DATA DATA-ERR 2089700300013 MEV MEV MB MB 2089700300014 14.1 0. 76. 11. 2089700300015 ENDDATA 3 0 2089700300016 ENDSUBENT 15 0 2089700399999 ENDENTRY 3 0 2089799999999