ENTRY 21757 19820217 00002175700000001 SUBENT 21757001 19820217 00002175700100001 BIB 12 29 2175700100002 INSTITUTE (2AUSATI) S.H AND H.R 2175700100003 (2FR FR ) H.C 2175700100004 (2FR ILL) U.K 2175700100005 REFERENCE (J,ZP/A,302,4,323,8110) MAIN REF 2175700100006 AUTHOR (S.HAMMERSCHMIED,H.RAUCH,H.CLERC,U.KISCHKO) 2175700100007 TITLE -MEASUREMENTS OF THE COHERENT NEUTRON-TRITIUM 2175700100008 SCATTERING LENGTH AND ITS RELATION TO FOUR NUCLEON 2175700100009 PROBLEM. - 2175700100010 FACILITY (REAC,2FR ILL) HIGH FLUX REACTOR 2175700100011 AND NEUTRON INTERFEROMETER. 2175700100012 INC-SOURCE (REAC ) 2175700100013 SAMPLE .TRITIUM GAS OF 0.124 GRAMS (22.06+-0.04 BAR AT 2175700100014 24.3+-0.03 DEG.) 2175700100015 METHOD (DIFFR) DIFFRACTION. 2175700100016 COMMENT .RE-MEASUREMENT OF THE COHERENT SCATTERING LENGTH OF 2175700100017 HYDROGEN AND DEUTERIUM WAS PERFORMED ALSO. THE 2175700100018 RESULTS ARE 2175700100019 B(H)= -3.74+-0.002 FERMI, 2175700100020 B(D)= 6.67+-0.004 FERMI, 2175700100021 IN AGREEMENT WITH PREVIOUS VALUES. 2175700100022 STATUS .DATA WERE TAKEN FROM MAIN REF. 2175700100023 HISTORY (811130C) T.N 2175700100024 (820217E) 2175700100025 ERR-ANALYS (ERR-T) TOTAL ERROR 2175700100026 (ERR-1) WAVE LENGTH DETERMINATION = 0.3 PERCENT, 2175700100027 (ERR-2) PRESSURE MEASUREMENT = 0.3 PERCENT, 2175700100028 (ERR-3) GAS ANALYSIS = 0.2 PERCENT, 2175700100029 (ERR-4) PHASE SHIFT DETERMINATION = 1.8 PERCENT, 2175700100030 (ERR-5) VESSEL WIDTH VARIATION = 0.5 PERCENT. 2175700100031 ENDBIB 29 0 2175700100032 NOCOMMON 0 0 2175700100033 ENDSUBENT 32 0 2175700199999 SUBENT 21757002 19820730 00002175700200001 BIB 3 7 2175700200002 REACTION (1-H-3(N,THS)1-H-3,BA/COH,AMP) 2175700200003 COMMENT .NEUTRON ENERGY CALCULATED FROM GIVEN NEUTRON WAVE 2175700200004 LENGTH OF 1.876+-0.005 ANGSTROM. 2175700200005 .BY ASSUMING FREE CROSS SECTION(SIG=1.70+-0.03B) THEY 2175700200006 RECOMMENDED THE SINGLET AND TRIPLET SCATTERING LENGTH 2175700200007 TO BE 3.70+-0.62 AND 3.70+-0.21 FERMI, RESPECTIVELY. 2175700200008 STATUS .DATA WERE TAKEN FROM MAIN REF 2175700200009 ENDBIB 7 0 2175700200010 NOCOMMON 0 0 2175700200011 DATA 9 1 2175700200012 EN EN-ERR DATA ERR-T ERR-1 ERR-2 2175700200013 ERR-3 ERR-4 ERR-5 2175700200014 MILLI-EV MILLI-EV FERMI FERMI PER-CENT PER-CENT 2175700200015 PER-CENT PER-CENT PER-CENT 2175700200016 2.3240E+01 1.2000E-01 5.1000E+00 1.0000E-01 3.0000E-01 3.0000E-012175700200017 2.0000E-01 1.8000E+00 5.0000E-01 2175700200018 ENDDATA 6 0 2175700200019 ENDSUBENT 18 0 2175700299999 ENDENTRY 2 0 2175799999999