ENTRY 14707 20210510 14861470700000001 SUBENT 14707001 20210510 14861470700100001 BIB 7 13 1470700100002 TITLE The Scattering of Slow Neutrons by Paramagnetic 1470700100003 Crystals 1470700100004 AUTHOR (I.W.Ruderman,W.W.Havens Jr,T.I.Taylor,L.J.Rainwater) 1470700100005 REFERENCE (J,PR,75,895,1949) 1470700100006 #doi:10.1103/PhysRev.75.895 1470700100007 (J,PR,76,434(2),1949) Erratum. 1470700100008 #doi:10.1103/PhysRev.76.434.2 1470700100009 REL-REF (I,11685001,L.J.Rainwater+,J,PR,71,65,1947) The 1470700100010 Columbia neutron velocity spectrometer. 1470700100011 INSTITUTE (1USACOL) 1470700100012 FACILITY (SELVE,1USACOL) The Columbia neutron velocity 1470700100013 spectrometer. 1470700100014 HISTORY (20210510C) BP 1470700100015 ENDBIB 13 0 1470700100016 NOCOMMON 0 0 1470700100017 ENDSUBENT 16 0 1470700199999 SUBENT 14707002 20210510 14861470700200001 BIB 5 11 1470700200002 REACTION (25-MN-CMP(N,TOT),,SIG) 1470700200003 SAMPLE Manganous fluoride: 1113 g/cm2. 1470700200004 Manganese fluoride: Manganese(II) fluoride, MnF2. 1470700200005 METHOD For lambda > 3A Be and BeO filters were used to 1470700200006 eliminate perturbing effects caused by faster 1470700200007 neutrons. Since paramagnetic scattering is incoherent 1470700200008 with respect to nuclear scattering, we may separate 1470700200009 the two types of scattering in regions where there 1470700200010 are no interfering crystal diffraction effects. 1470700200011 ADD-RES Fig.2 shows point at wavelength=0. with 17.002 b. 1470700200012 STATUS (CURVE) Fig. 2, page 896 of Phys.Rev.75,895,1949 1470700200013 ENDBIB 11 0 1470700200014 NOCOMMON 0 0 1470700200015 DATA 2 46 1470700200016 WVE-LN DATA 1470700200017 ANGSTROM B 1470700200018 0.743 10.875 1470700200019 1.630 9.989 1470700200020 2.438 10.652 1470700200021 3.098 11.684 1470700200022 4.203 11.756 1470700200023 4.863 12.715 1470700200024 5.671 13.525 1470700200025 6.553 13.967 1470700200026 7.435 14.703 1470700200027 8.169 15.588 1470700200028 9.125 16.103 1470700200029 9.786 16.619 1470700200030 10.594 17.503 1470700200031 11.329 18.093 1470700200032 12.284 18.756 1470700200033 12.798 19.493 1470700200034 13.238 20.083 1470700200035 13.534 19.639 1470700200036 13.973 20.451 1470700200037 14.342 20.450 1470700200038 14.928 21.335 1470700200039 15.371 21.187 1470700200040 16.031 22.071 1470700200041 16.617 23.177 1470700200042 17.133 22.955 1470700200043 17.353 23.398 1470700200044 17.794 23.692 1470700200045 18.161 24.061 1470700200046 18.749 24.429 1470700200047 19.042 25.093 1470700200048 19.483 25.240 1470700200049 19.998 25.534 1470700200050 20.439 25.755 1470700200051 20.803 27.304 1470700200052 21.172 27.082 1470700200053 21.688 27.082 1470700200054 22.054 27.598 1470700200055 22.422 27.892 1470700200056 22.937 28.113 1470700200057 23.376 29.146 1470700200058 23.816 29.662 1470700200059 24.039 29.071 1470700200060 24.629 28.701 1470700200061 25.067 30.176 1470700200062 25.290 29.438 1470700200063 25.877 30.175 1470700200064 ENDDATA 48 0 1470700200065 ENDSUBENT 64 0 1470700299999 SUBENT 14707003 20210510 14861470700300001 BIB 5 11 1470700300002 REACTION (25-MN-CMP(N,TOT),,SIG) 1470700300003 SAMPLE Manganous fluoride: 563 g/cm2. 1470700300004 Manganese fluoride: Manganese(II) fluoride, MnF2. 1470700300005 METHOD For lambda > 3A Be and BeO filters were used to 1470700300006 eliminate perturbing effects caused by faster 1470700300007 neutrons. Since paramagnetic scattering is incoherent 1470700300008 with respect to nuclear scattering, we may separate 1470700300009 the two types of scattering in regions where there 1470700300010 are no interfering crystal diffraction effects. 1470700300011 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. 1470700300012 STATUS (CURVE) Fig. 2, page 896 of Phys.Rev.75,895,1949 1470700300013 ENDBIB 11 0 1470700300014 NOCOMMON 0 0 1470700300015 DATA 3 19 1470700300016 WVE-LN DATA DATA-ERR 1470700300017 ANGSTROM B B 1470700300018 26.387 32.020 1470700300019 28.077 33.419 1470700300020 29.766 34.967 1470700300021 31.452 37.916 0.517 1470700300022 33.582 39.685 0.664 1470700300023 35.637 42.338 0.738 1470700300024 37.768 43.811 0.738 1470700300025 39.602 46.392 0.812 1470700300026 41.657 48.898 0.886 1470700300027 43.720 48.748 0.738 1470700300028 45.702 51.033 0.517 1470700300029 47.539 52.432 0.517 1470700300030 49.675 52.577 0.443 1470700300031 51.732 54.271 0.517 1470700300032 53.789 56.261 0.590 1470700300033 55.852 56.036 0.516 1470700300034 57.911 57.362 0.664 1470700300035 59.964 60.237 0.812 1470700300036 61.953 60.234 0.886 1470700300037 ENDDATA 21 0 1470700300038 ENDSUBENT 37 0 1470700399999 SUBENT 14707004 20210510 14861470700400001 BIB 3 16 1470700400002 REACTION (25-MN-55(N,THS)25-MN-55,INC,SIG,,MSC,DERIV) 1470700400003 Paramagnetic scattering cross section of Mn++ in 1470700400004 manganous fluoride. 1470700400005 ANALYSIS The difference between the experimental and 1470700400006 hypothetical curve in the regions 0 to 4.2A and 5.5 1470700400007 to 6.2A was taken as the paramagnetic cross section. 1470700400008 For simplicity, we assume that there is no loss of 1470700400009 coherent scattering in the hypothetical curve up to 1470700400010 5.46A, the cut-off wave-length for Bragg reflections 1470700400011 for MnF2. Beyond the cut-off the equation of the 1470700400012 curve is given by sigma = (1.0+2.31**(-1/2)); the 1470700400013 assumed residual incoherent scattering cross section 1470700400014 of 1.0 barn appears to be a justifiable approximation 1470700400015 on the basis of other studies carried out here. 1470700400016 STATUS (DEP,14707002) 1470700400017 (CURVE) Fig. 3, page 896 of Phys.Rev.75,895,1949 1470700400018 ENDBIB 16 0 1470700400019 NOCOMMON 0 0 1470700400020 DATA 2 10 1470700400021 WVE-LN DATA 1470700400022 ANGSTROM B 1470700400023 1.601 0.479 1470700400024 1.971 0.905 1470700400025 2.372 1.392 1470700400026 2.783 2.287 1470700400027 3.165 3.264 1470700400028 3.567 4.568 1470700400029 3.979 5.667 1470700400030 5.555 9.779 1470700400031 5.843 10.185 1470700400032 6.234 10.774 1470700400033 ENDDATA 12 0 1470700400034 ENDSUBENT 33 0 1470700499999 ENDENTRY 4 0 1470799999999