ENTRY 30993 20090919 31413099300000001 SUBENT 30993001 20090919 31413099300100001 BIB 13 63 3099300100002 TITLE Absolute measurement of cross sections of 3099300100003 Al-27(n,alpha)Na-24 and Fe-56(n,p)Mn-56 at 3099300100004 En = 14.6 MeV. 3099300100005 AUTHOR (Bao Zongyu,Rong Chaofan,Yang Xiaoyun,Zhang Shuping, 3099300100006 Ding Shengyao,Yu Yiguang) 3099300100007 INSTITUTE (3CPRAEP) 3099300100008 REFERENCE (J,CNP,15,(4),341,1993) Main reference 3099300100009 (C,91JUELIC,,526,199105) Same data as 3099300100010 Chin.J.Nucl.Phys.15,341,1993 3099300100011 (C,91BEIJIN,,236,199109) 3099300100012 FACILITY (CCW,3CPRAEP) CIAE 600 kV Cockroft-Walton generator.- 3099300100013 SAMPLE Aluminium and iron samples, 0.2 mm thick, purity 3099300100014 99.99%, held by circles of very thin copper wire, were 3099300100015 placed 80 - 130 cm from the Ti-T target. 3099300100016 INC-SOURCE (D-T) Neutrons were produced by bombarding a 0.5 3099300100017 mg/cm**2 thick T-Ti target on a Mo backing with 200 3099300100018 keV deuterons. The neutron energy at the position of 3099300100019 the samples was obtained with a Monte-Carlo calculation3099300100020 considering the thickness and the size of both the 3099300100021 target spot and the sample. 3099300100022 METHOD (ACTIV,COINC,ASSOP) The induced specific activity was 3099300100023 determined by beta-gamma coincidence spectrometry. 3099300100024 The neutron fluence was determined by counting associa-3099300100025 ted alpha particles from the D(t,n)He-4 reaction. 3099300100026 DETECTOR (COIN,NAICR,PROPC) A 4Pi-beta-gamma coincidence 3099300100027 device consisting of a methane gas flow proportional 3099300100028 beta counter positioned between two NaI(Tl) scintilla- 3099300100029 tor gamma counters. 3099300100030 CORRECTION In addition to the routine decay corrections, correc- 3099300100031 tions have been made for: 3099300100032 - The room background, 0.3 - 1.3%. 3099300100033 - The influence of the charged particles He-3, p and 3099300100034 t from d+d reaction, which was found to Be less than3099300100035 0.2% within a 15 hr irradiation period. 3099300100036 - Self-absorption in the sample was 0.1 percent for 3099300100037 aluminium and 0.2 percent for iron; 3099300100038 - Absorption and scattering of the neutron target 3099300100039 assembly, 1.1% and 0.5% respectively. 3099300100040 - Dead time of alpha-particle detection system, 3099300100041 0.4%-0.7%. 3099300100042 - Influence of Fe-57(n,np+d+pn)Mn-56 reaction, 0.2%. 3099300100043 ERR-ANALYS (ERR-T) The main uncertainties of the measurement 3099300100044 correspond to: 3099300100045 (ERR-1) Solid angle of alpha counter 3099300100046 (ERR-2) Background correction for alpha-particle 3099300100047 (ERR-3) Anisotropy of neutron beam 3099300100048 (ERR-4) Solid angle of sample 3099300100049 (ERR-5) Room background correction 3099300100050 (ERR-6) Absorption correction of target assembly 3099300100051 (ERR-7) Scattering correction of target assembly 3099300100052 (ERR-8) Absorption and scattering of the sample'S 3099300100053 frame 3099300100054 (ERR-9) Self-absorption and scattering of sample 3099300100055 (ERR-10) Neutron energy 3099300100056 (ERR-11) Beta-efficiency extrapolation factor 3099300100057 STATUS (TABLE) Data are taken from the text of Conf. on Nucl. 3099300100058 Data for Sci. and Technol., Juelich 1991, page 526. 3099300100059 HISTORY (19920727C) HW 3099300100060 (19921015U) HW.- Reference added in subentry 001. 3099300100061 (19930825U) HW.- Free text under 'correction' altered.3099300100062 (19940318U) HW.-New reference added, new information 3099300100063 entered in subent 001.- 3099300100064 (20090912A) SD:Updated to new date formats,lower case. 3099300100065 ENDBIB 63 0 3099300100066 COMMON 13 9 3099300100067 EN EN-ERR ERR-S ERR-1 ERR-2 ERR-3 3099300100068 ERR-4 ERR-5 ERR-6 ERR-7 ERR-8 ERR-10 3099300100069 ERR-11 3099300100070 MEV MEV PER-CENT PER-CENT PER-CENT PER-CENT 3099300100071 PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3099300100072 PER-CENT 3099300100073 14.57 0.02 0.3 0.1 0.2 0.3 3099300100074 1.0 0.1 0.4 0.2 0.2 0.3 3099300100075 0.1 3099300100076 ENDCOMMON 9 0 3099300100077 ENDSUBENT 76 0 3099300199999 SUBENT 30993002 20090919 31413099300200001 BIB 2 2 3099300200002 REACTION (13-AL-27(N,A)11-NA-24,,SIG) 3099300200003 DECAY-DATA (11-NA-24,14.959HR,DG,2754.,,B-) 3099300200004 ENDBIB 2 0 3099300200005 NOCOMMON 0 0 3099300200006 DATA 3 1 3099300200007 DATA ERR-T ERR-9 3099300200008 MB MB PER-CENT 3099300200009 113.2 1.5 0.1 3099300200010 ENDDATA 3 0 3099300200011 ENDSUBENT 10 0 3099300299999 SUBENT 30993003 20090919 31413099300300001 BIB 3 3 3099300300002 REACTION (26-FE-56(N,P)25-MN-56,,SIG) 3099300300003 DECAY-DATA (25-MN-56,2.5785HR,DG,846.7,,B-) 3099300300004 ERR-ANALYS (ERR-12)Interference of other isotopes 3099300300005 ENDBIB 3 0 3099300300006 NOCOMMON 0 0 3099300300007 DATA 4 1 3099300300008 DATA ERR-T ERR-9 ERR-12 3099300300009 MB MB PER-CENT PER-CENT 3099300300010 111.4 1.5 0.2 0.1 3099300300011 ENDDATA 3 0 3099300300012 ENDSUBENT 11 0 3099300399999 ENDENTRY 3 0 3099399999999