ENTRY 40752 20231113 421640752 0 1 SUBENT 40752001 20231113 421640752 1 1 BIB 14 55 40752 1 2 TITLE Scattering of slow neutrons by ortho- and 40752 1 3 para-deuterium 40752 1 4 AUTHOR (S.J.Nikitin, W.T.Smolyankin, W.Z.Kolganow,A.W.Lebedew,40752 1 5 G.S.Lomkazy) 40752 1 6 REFERENCE (C,55GENEVA,2,81,1955) Paper 643. 40752 1 7 Russian edition page 99. 40752 1 8 INSTITUTE (4RUSITE) 40752 1 9 FACILITY (REAC,4RUSITE) Heavy-water research reactor 40752 1 10 INC-SOURCE (THCOL) Thermal column 40752 1 11 INC-SPECT Effective energy of the filtered neutrons in Be (26 cm40752 1 12 of metallic beryllium powder) 0.0047 eV was 40752 1 13 determined in special absorption measurements. 40752 1 14 Number of neutrons with E > 0.0093 eV was < 0.5%. 40752 1 15 SAMPLE .Gaseous samples with various ortho- and para-deuterium40752 1 16 composition: 40752 1 17 - 66.7% ortho- and 33.3 % pare-deuterium, 40752 1 18 - 97.79 of ortho- and 2.21 % para-deuterium, 40752 1 19 in inner tube of 200 cm long, 5 cm diameter; 40752 1 20 contents were measured with accuracy up to 0.1 %. 40752 1 21 The gas contained 99.2+-0.05 % of deuterium. 40752 1 22 . Liquid hydrogen in space between inner and outer 40752 1 23 tubes. 40752 1 24 METHOD (TRN) 19 independent series: 40752 1 25 - nine with gas containing 2/3 ortho- and 1/3 40752 1 26 para-deuterium, mean cross-section 16.00+-0.03 b; 40752 1 27 - ten with gas containing 97.7 % ortho- and 2.21 % 40752 1 28 para-deuterium, mean cross-section 16.41+-0.02b. 40752 1 29 Errors are determined by statistical errors and by 40752 1 30 errors in pressure measurement. 40752 1 31 DETECTOR (PROPC) BF3-filled proportional counter, enriched in 40752 1 32 B-10 - for scattered neutrons counting. 40752 1 33 . Primary intensity of the beam was controlled by two 40752 1 34 monitor counters. 40752 1 35 MONITOR No information 40752 1 36 ADD-RES Scattering cross-section were measured by 40752 1 37 transmission method (neutron energy 0.0047 eV) to be 40752 1 38 - for deuterium : 40752 1 39 SIGortho = 15.95+-0.03 b (even rotational quantum 40752 1 40 number I, even spin), 40752 1 41 SIGpara = 14.63+-0.1 b (add rotational quantum 40752 1 42 number I, odd spin); 40752 1 43 - for hydrogen : 40752 1 44 SIGortho = 104.1+-0.7 b (even rotational quantum 40752 1 45 number I, even spin), 40752 1 46 SIGpara = 3.91+-0.1 b (add rotational quantum 40752 1 47 number I, odd spin) 40752 1 48 ERR-ANALYS (DATA-ERR) Error not specified 40752 1 49 HISTORY (19840612T) Converted from ENTRY 80129 40752 1 50 (19910722U) INSTITUTE code 'CCP' changed to 'ITE', 40752 1 51 one author name (Smolyankin) corrected. 40752 1 52 (20231113A) Upper -> lower case correction. 40752 1 53 Dates were corrected for 4-digits year. 40752 1 54 SAMPLE, METHOD, ADD-RES were added. 40752 1 55 EN: 0.0253 eV -> 0.0047 eV as given in the article. 40752 1 56 "(P/643)" was deleted from references. 40752 1 57 ENDBIB 55 0 40752 1 58 NOCOMMON 0 0 40752 1 59 ENDSUBENT 58 0 40752 199999 SUBENT 40752002 20231113 421640752 2 1 BIB 4 5 40752 2 2 REACTION (1-H-1(N,THS)1-H-1,COH,AMP) 40752 2 3 STATUS (SCSRS) 40752 2 4 METHOD (TRN) Transmission of ortho- and para-hydrogen. 40752 2 5 ANALYSIS Calculated from A(1)=-5.42+-.05Fm and A(0)=24.9+-.05Fm 40752 2 6 by NNCSC 40752 2 7 ENDBIB 5 0 40752 2 8 NOCOMMON 0 0 40752 2 9 DATA 3 1 40752 2 10 EN DATA DATA-ERR 40752 2 11 EV FERMI FERMI 40752 2 12 0.0047 -4.33 0.11 40752 2 13 ENDDATA 3 0 40752 2 14 ENDSUBENT 13 0 40752 299999 SUBENT 40752003 20231113 421640752 3 1 BIB 4 5 40752 3 2 REACTION (1-H-2(N,THS)1-H-2,COH,AMP) 40752 3 3 STATUS (SCSRS) 40752 3 4 METHOD (TRN) Transmission of Be-filtered neutrons by ortho- 40752 3 5 and para-deuterium. 40752 3 6 ANALYSIS Calculated by NNCSC from amplitudes in reference. 40752 3 7 ENDBIB 5 0 40752 3 8 NOCOMMON 0 0 40752 3 9 DATA 3 1 40752 3 10 EN DATA DATA-ERR 40752 3 11 EV FERMI FERMI 40752 3 12 0.0047 6.75 0.16 40752 3 13 ENDDATA 3 0 40752 3 14 ENDSUBENT 13 0 40752 399999 ENDENTRY 3 0 4075299999999