ENTRY 31781 20180221 31823178100000001 SUBENT 31781001 20180221 31823178100100001 BIB 13 43 3178100100002 TITLE Measurements of the total neutron cross sections of 3178100100003 Nb-93 by using the filtered neutron beams 3178100100004 AUTHOR (Tran Tuan Anh, Pham Ngoc Son, Vuong Huu Tan) 3178100100005 INSTITUTE (3VN DAL) 3178100100006 (3VN VN) Vietnam Atomic Energy Society, Hanoi. 3178100100007 REFERENCE (J,ANE,113,420,2018) 3178100100008 #doi:10.1016/j.anucene.2017.11.035 3178100100009 FACILITY (REAC,3VN DAL) 3178100100010 INC-SOURCE (REAC) The measuring time for each sample was 2 h. 3178100100011 The following characteristics of the beam were used: 3178100100012 Neutron Neutron Relative 3178100100013 energY flux intensity 3178100100014 keV (n/cm2/S) (%) 3178100100015 24 6.2*10**5 98.3 3178100100016 54 6.9*10**5 76.9 3178100100017 133 3.3*10**5 92.9 3178100100018 148 4.1*10**6 94.6 3178100100019 DETECTOR (PROPC) Proton-recoil spectrometer with LND-281 3178100100020 proton-recoil counter and CANBERRA multichannel 3178100100021 analyzer. The LND-281 counter is made by a stainless 3178100100022 steel tube of 0.8 mm wall thickness, 38.1 mm diameter, 3178100100023 177.8 mm effective length and filled with H2 + CH4+N2 3178100100024 mixed gases at a pressure of 3240 Torr. 3178100100025 SAMPLE Several samples from niobium cylindrical rod 3178100100026 (diam. 2.044 +/- 0.005 cm) were prepared. Properties 3178100100027 of samples: 3178100100028 Thickness Weight Atomic number 3178100100029 (cm) (g) density 3178100100030 (atoms/barn) 3178100100031 Sample 1 0.750+/-0.001 20.79 0.0411+/-0.0001 3178100100032 Sample 2 1.560+/-0.002 43.24 0.0854+/-0.0002 3178100100033 Sample 3 2.551+/-0.002 70.71 0.1397+/-0.0004 3178100100034 Sample 4 4.111+/-0.005 113.95 0.2251+/-0.0007 3178100100035 Sample 5 4.861+/-0.009 134.74 0.2662+/-0.0009 3178100100036 METHOD (FNB) 3178100100037 ANALYSIS Cross sections for each sample thickness were averaged.3178100100038 ERR-ANALYS (ERR-T) Total uncertainty of experiment. 3178100100039 (ERR-S,1.2,6.) Error of counting statistics. 3178100100040 (ERR-1,0.3,0.5) Error in sample thickness. 3178100100041 (ERR-2,0.03,2.3) Error in fitting. 3178100100042 (ERR-3,,1.) Error in neutron flux fluctuation. 3178100100043 STATUS (TABLE) Table 4. 3178100100044 HISTORY (20180221C) SS+On 3178100100045 ENDBIB 43 0 3178100100046 NOCOMMON 0 0 3178100100047 ENDSUBENT 46 0 3178100199999 SUBENT 31781002 20180221 31823178100200001 BIB 1 1 3178100200002 REACTION (41-NB-93(N,TOT),,SIG,,AV) 3178100200003 ENDBIB 1 0 3178100200004 NOCOMMON 0 0 3178100200005 DATA 4 4 3178100200006 EN EN-ERR DATA ERR-T 3178100200007 KEV KEV B B 3178100200008 24. 1.8 8.50 0.29 3178100200009 54. 1.5 9.13 0.29 3178100200010 133. 2.7 9.79 0.41 3178100200011 148. 14.8 9.60 0.17 3178100200012 ENDDATA 6 0 3178100200013 ENDSUBENT 12 0 3178100299999 ENDENTRY 2 0 3178199999999