ENTRY 21098 20170802 22632109800000001 SUBENT 21098001 20170802 22632109800100001 BIB 15 49 2109800100002 INSTITUTE (2UK ALD) 2109800100003 REFERENCE (J,NP,72,515,1965) 2109800100004 (R,EANDC(UK)-57,1965) 2109800100005 AUTHOR (J.H.Towle,W.B.Gilboy) 2109800100006 TITLE Neutron scattering studies of K-39 2109800100007 FACILITY (VDG,2UK ALD) 6 MeV van de Graaff. 2109800100008 INC-SOURCE (P-T) Tritium gas target. 2109800100009 INC-SPECT (EN-RSL) The combined neutron energy spread (due to 2109800100010 target thickness and angular energy variation) was 2109800100011 about 90 keV at each incident energy. 2109800100012 SAMPLE .Cylindrical sample 4.5 cm in diameter, 4.8 cm long 2109800100013 and weighing 65.8 g, made by pouring molten natural 2109800100014 potassium (93.2% K-39, 6.8% K-41, 0.01% K-40) under 2109800100015 an inert atmosphere into a light aluminum can of wall 2109800100016 thickness 0.04 cm. Impurity content less than 1%. 2109800100017 MONITOR (1-H-1(N,EL)1-H-1,,DA) The cross-section scale was 2109800100018 fixed relative to the well known neutron-proton 2109800100019 scattering cross-section samples at 40.fegr. to the 2109800100020 incident flux. 2109800100021 MONIT-REF (,D.J.Hughes+,R,BNL-325,1958) Neutron Cross Sections, 2109800100022 2nd edn., U.S. Atomic Energy Commission, BNL-325. 2109800100023 METHOD (TOF) Time-of-flight, 1.71 m flight path. 2109800100024 (PSD) Pulse shape discrimination to separate neutron 2109800100025 neutrons and gammas. 2109800100026 CORRECTION * The shape of the elastic scattering angular 2109800100027 distributions and the scattering cross sections have 2109800100028 all been corrected for the effects of multiple 2109800100029 scattering, flux attenuation and finite source-sample 2109800100030 geometry using the Monte-Carlo program MAGGIE. 2109800100031 Corrections for similar effects in the polythene 2109800100032 samples were also made using MAGGIE. 2109800100033 REL-REF (M,,J.B.Parker+,J,NIM,30,77,1964) Monte-Carlo program 2109800100034 (R,,J.R.Stehn+,R,BNL-325,1964) Neutron Cross Sections, 2109800100035 2nd ed., Supplement No. 2 (1964). 2109800100036 (I,21089001,J.H.Towle+,J,NP,32,610,1962) -! equipment 2109800100037 (I,21128001,J.H.Towle+,J,NP,44,256,1963) -! has been 2109800100038 -! fully described 2109800100039 DETECTOR (SCIN) Organic scintillator in collimated shield. 2109800100040 Detector biased at 0.4 MeV neutron energy. 2109800100041 Relative efficiency found by measuring count 2109800100042 rate from p-t at various angles and comparing 2109800100043 with the known angular distribution. 2109800100044 HISTORY (19790818C) 2109800100045 (19860321U)N.Ch 2109800100046 (20170802A) SD:Updated to new date formats,lower case. 2109800100047 REACTION code corrected in Subent 002. BIB update. 2109800100048 Meaningless zeros were deleted from the data. MONITOR, 2109800100049 CORRECTION moved to Subent 001, REL-REF was added. 2109800100050 Subent 006 and 009 deleted. 2109800100051 ENDBIB 49 0 2109800100052 NOCOMMON 0 0 2109800100053 ENDSUBENT 52 0 2109800199999 SUBENT 21098002 20170802 22632109800200001 BIB 4 6 2109800200002 REACTION (19-K-0(N,EL)19-K-0,,DA) 2109800200003 ERR-ANALYS (ERR-S) Statistical error given. 2109800200004 (ERR-SYS) Overall scale error 2109800200005 STATUS (TABLE) Table 7 of EANDC(UK)-57 2109800200006 HISTORY (20170802A) SD: SF4=K-0 was added to REACTION code. 2109800200007 STATUS, ERR-ANALYS update. 2109800200008 ENDBIB 6 0 2109800200009 COMMON 2 3 2109800200010 EN-RSL ERR-SYS 2109800200011 MEV PER-CENT 2109800200012 0.090 3. 2109800200013 ENDCOMMON 3 0 2109800200014 DATA 4 55 2109800200015 EN COS-CM DATA-CM ERR-S 2109800200016 MEV NO-DIM MB/SR MB/SR 2109800200017 1.49 -0.720 145. 3. 2109800200018 1.49 -0.591 116. 2. 2109800200019 1.49 -0.482 85.1 4.7 2109800200020 1.49 -0.365 76.5 2.6 2109800200021 1.49 -0.199 79.7 2.6 2109800200022 1.49 -0.026 97.2 2.6 2109800200023 1.49 0.148 127. 3. 2109800200024 1.49 0.319 186. 4. 2109800200025 1.49 0.480 258. 5. 2109800200026 1.49 0.627 330. 6. 2109800200027 1.49 0.755 421. 8. 2109800200028 1.49 0.859 499. 14. 2109800200029 1.49 0.937 572. 23. 2109800200030 2.38 -0.720 130. 3. 2109800200031 2.38 -0.658 103. 2. 2109800200032 2.38 -0.591 90.8 2.7 2109800200033 2.38 -0.365 70.2 2.7 2109800200034 2.38 -0.199 77.1 2.2 2109800200035 2.38 -0.026 89.5 2.2 2109800200036 2.38 0.148 113. 3. 2109800200037 2.38 0.319 166. 3. 2109800200038 2.38 0.480 240. 5. 2109800200039 2.38 0.627 342. 7. 2109800200040 2.38 0.755 490. 10. 2109800200041 2.38 0.859 674. 21. 2109800200042 2.38 0.937 798. 25. 2109800200043 3.00 -0.720 134. 3. 2109800200044 3.00 -0.658 116. 2. 2109800200045 3.00 -0.519 88.6 1.8 2109800200046 3.00 -0.365 82.7 1.6 2109800200047 3.00 -0.199 86.6 1.6 2109800200048 3.00 -0.026 96.7 2. 2109800200049 3.00 0.148 113. 2. 2109800200050 3.00 0.319 152. 3. 2109800200051 3.00 0.480 240. 5. 2109800200052 3.00 0.627 372. 7. 2109800200053 3.00 0.755 541. 11. 2109800200054 3.00 0.859 756. 15. 2109800200055 3.00 0.937 1014. 20. 2109800200056 3.76 -0.720 115. 2. 2109800200057 3.76 -0.658 100. 3. 2109800200058 3.76 -0.591 87.9 1.8 2109800200059 3.76 -0.519 89.1 1.8 2109800200060 3.76 -0.365 79.6 1.6 2109800200061 3.76 -0.199 73.9 1.4 2109800200062 3.76 -0.026 65.9 1.3 2109800200063 3.76 0.148 65.7 1.3 2109800200064 3.76 0.319 89.4 1.8 2109800200065 3.76 0.480 164. 3. 2109800200066 3.76 0.627 323. 6. 2109800200067 3.76 0.694 426. 8. 2109800200068 3.76 0.755 531. 10. 2109800200069 3.76 0.811 669. 12. 2109800200070 3.76 0.859 799. 16. 2109800200071 3.76 0.937 1114. 32. 2109800200072 ENDDATA 57 0 2109800200073 ENDSUBENT 72 0 2109800299999 SUBENT 21098003 20170802 22632109800300001 BIB 5 9 2109800300002 REACTION (19-K-0(N,EL)19-K-0,,SIG) 2109800300003 ANALYSIS (INTAD) Integration of measured angular distribution. 2109800300004 ERR-ANALYS (ERR-T) total error 2109800300005 (ERR-SYS) Overall scale error 2109800300006 STATUS (TABLE) Table 1 from Nucl. Phys.,72,(1965),519. 2109800300007 (DEP,21098002) Dif.cr.sect. 2109800300008 HISTORY (19860321A)N.Ch 2109800300009 (20170802A) SD: STATUS 'DEP' was added. MONIT, 2109800300010 ERR-ANALYS were added. 2109800300011 ENDBIB 9 0 2109800300012 COMMON 2 3 2109800300013 EN-RSL ERR-SYS 2109800300014 MEV PER-CENT 2109800300015 0.090 3. 2109800300016 ENDCOMMON 3 0 2109800300017 DATA 4 4 2109800300018 EN DATA ERR-T MONIT 2109800300019 MEV B B B 2109800300020 1.49 2.63 0.09 3.44 2109800300021 2.38 2.86 0.10 2.63 2109800300022 3.00 3.17 0.11 2.27 2109800300023 3.76 2.87 0.10 1.96 2109800300024 ENDDATA 6 0 2109800300025 ENDSUBENT 24 0 2109800399999 SUBENT 21098004 20170802 22632109800400001 BIB 5 9 2109800400002 REACTION (19-K-39(N,INL)19-K-39,PAR,DA) 2109800400003 CORRECTION .Correction applied for contamination of inelastic 2109800400004 peaks by neutrons in the tail of the elastic peak 2109800400005 caused by a tail in the source spectrum due to 2109800400006 scattering in gas cell walls and surrounding air. 2109800400007 ERR-ANALYS (ERR-S) Statistical error given. 2109800400008 (ERR-SYS) Normalization error 2109800400009 STATUS (TABLE) Table 8 of EANDC(UK)-57. 2109800400010 HISTORY (20170802U) SD: ERR-ANALYS update. ERR-SYS was added. 2109800400011 ENDBIB 9 0 2109800400012 COMMON 2 3 2109800400013 EN EN-RSL 2109800400014 MEV MEV 2109800400015 3.76 0.090 2109800400016 ENDCOMMON 3 0 2109800400017 DATA 5 42 2109800400018 E-LVL COS-CM DATA-CM ERR-S ERR-SYS 2109800400019 MEV NO-DIM MB/SR MB/SR PER-CENT 2109800400020 2.53 -0.730 9.5 1.2 5. 2109800400021 2.53 -0.604 8.2 0.7 5. 2109800400022 2.53 -0.534 7.8 0.6 5. 2109800400023 2.53 -0.383 8.0 0.6 5. 2109800400024 2.53 -0.218 8.5 0.6 5. 2109800400025 2.53 -0.046 7.2 0.5 5. 2109800400026 2.53 0.129 7.3 0.5 5. 2109800400027 2.53 0.301 7.0 0.6 5. 2109800400028 2.53 0.465 8.0 0.7 5. 2109800400029 2.53 0.615 8.3 0.7 5. 2109800400030 2.53 0.684 9.6 0.8 5. 2109800400031 2.53 0.747 8.6 0.8 5. 2109800400032 2.53 0.804 7.5 1.2 5. 2109800400033 2.53 0.854 9.4 0.8 5. 2109800400034 2.82 -0.733 9.7 0.6 5. 2109800400035 2.82 -0.609 8.5 0.7 5. 2109800400036 2.82 -0.540 9.1 0.6 5. 2109800400037 2.82 -0.389 8.2 0.6 5. 2109800400038 2.82 -0.225 9.2 0.6 5. 2109800400039 2.82 -0.054 9.8 0.6 5. 2109800400040 2.82 0.121 9.9 0.5 5. 2109800400041 2.82 0.294 9.4 0.6 5. 2109800400042 2.82 0.459 8.2 0.6 5. 2109800400043 2.82 0.611 8.5 0.5 5. 2109800400044 2.82 0.680 9.9 0.9 5. 2109800400045 2.82 0.743 8.9 0.6 5. 2109800400046 2.82 0.801 8.4 0.8 5. 2109800400047 2.82 0.852 8.6 0.6 5. 2109800400048 3.02 -0.737 5.1 0.6 10. 2109800400049 3.02 -0.614 4.7 0.6 10. 2109800400050 3.02 -0.545 5.3 0.6 10. 2109800400051 3.02 -0.395 6.5 0.6 10. 2109800400052 3.02 -0.233 7.1 0.6 10. 2109800400053 3.02 -0.061 5.9 0.5 10. 2109800400054 3.02 0.114 6.3 0.6 10. 2109800400055 3.02 0.288 5.5 0.6 10. 2109800400056 3.02 0.454 6.9 0.6 10. 2109800400057 3.02 0.606 6.6 0.7 10. 2109800400058 3.02 0.676 7.4 0.7 10. 2109800400059 3.02 0.740 6.8 0.8 10. 2109800400060 3.02 0.798 7.8 0.9 10. 2109800400061 3.02 0.850 7.8 0.8 10. 2109800400062 ENDDATA 44 0 2109800400063 ENDSUBENT 62 0 2109800499999 SUBENT 21098005 20170802 22632109800500001 BIB 6 10 2109800500002 REACTION (19-K-39(N,INL)19-K-39,PAR,SIG) 2109800500003 ANALYSIS (INTAD) Integration of measured angular distribution. 2109800500004 COMMENT .Cross-sections probably contain a small contribution 2109800500005 from levels in K-41. 2109800500006 ERR-ANALYS (ERR-SYS) Normalization error 2109800500007 (ERR-T) total error 2109800500008 STATUS (TABLE) Table 2 from Nucl.Phys.,72,(1965),515 2109800500009 the same in Tbl.2 of EANDC(UK)-57 2109800500010 (DEP,21098004) Angular distributions 2109800500011 HISTORY (20170802U) SD: ERR-ANALYS update. ERR-SYS was added. 2109800500012 ENDBIB 10 0 2109800500013 COMMON 2 3 2109800500014 EN EN-RSL 2109800500015 MEV MEV 2109800500016 3.76 0.090 2109800500017 ENDCOMMON 3 0 2109800500018 DATA 4 3 2109800500019 E-LVL DATA ERR-T ERR-SYS 2109800500020 MEV MB MB PER-CENT 2109800500021 2.53 104. 5. 5. 2109800500022 2.82 113. 6. 5. 2109800500023 3.02 76. 8. 10. 2109800500024 ENDDATA 5 0 2109800500025 ENDSUBENT 24 0 2109800599999 NOSUBENT 21098006 20170802 22632109800600001 SUBENT 21098007 20170802 22632109800700001 BIB 8 16 2109800700002 REACTION (19-K-0(N,TOT),,SIG) 2109800700003 METHOD (TRN) Time-of-flight transmission measurement. 2109800700004 Detector placed 180 cm from neutron source. 2109800700005 ANALYSIS The total cross section was derived from the ratio 2109800700006 of the number of counts in the neutron peak in the 2109800700007 time spectrum obtained with the potassium sample, to 2109800700008 that obtained with the duplicate empty can. 2109800700009 ADD-RES .Total cross-section measured to compare with the sum 2109800700010 of partials. 2109800700011 ERR-ANALYS (DATA-ERR) Total error (no other info). 2109800700012 STATUS (TABLE) Table 1 of Nucl. Phys.,72,(1965),515. 2109800700013 The same data in Tbl. 1 of EANDC(UK)-57. 2109800700014 (DEP,21098008) Extracted from total cr.sect., except 2109800700015 first point. 2109800700016 CORRECTION .Dead time, background and inscattering. 2109800700017 HISTORY (20170802U) SD: ERR-ANALYS, STATUS update. 2109800700018 ENDBIB 16 0 2109800700019 COMMON 1 3 2109800700020 DATA-ERR 2109800700021 B 2109800700022 0.07 2109800700023 ENDCOMMON 3 0 2109800700024 DATA 2 4 2109800700025 EN DATA 2109800700026 MEV B 2109800700027 1.49 2.85 2109800700028 2.38 3.24 2109800700029 3.00 3.43 2109800700030 3.76 3.63 2109800700031 ENDDATA 6 0 2109800700032 ENDSUBENT 31 0 2109800799999 SUBENT 21098008 20170802 22632109800800001 BIB 8 13 2109800800002 REACTION (19-K-0(N,TOT),,SIG) 2109800800003 INC-SPECT .Neutron energy spread varies between 0.065 MeV at 2109800800004 2 MeV and 0.042 MeV at 4 MeV. 2109800800005 METHOD (TRN) Time-of-flight transmission measurement. 2109800800006 Detector placed 180 cm from neutron source. 2109800800007 ANALYSIS The total cross section was derived from the ratio 2109800800008 of the number of counts in the neutron peak in the 2109800800009 time spectrum obtained with the potassium sample, to 2109800800010 that obtained with the duplicate empty can. 2109800800011 STATUS (TABLE) Table 6 of EANDC(UK)-57. 2109800800012 CORRECTION .Dead-time, background and inscattering. 2109800800013 ERR-ANALYS (DATA-ERR) Total error (no other info). 2109800800014 HISTORY (20170802U) SD: ERR-ANALYS update. 2109800800015 ENDBIB 13 0 2109800800016 COMMON 1 3 2109800800017 DATA-ERR 2109800800018 B 2109800800019 0.07 2109800800020 ENDCOMMON 3 0 2109800800021 DATA 3 14 2109800800022 EN EN-RSL DATA 2109800800023 MEV MEV B 2109800800024 2.004 0.065 3.205 2109800800025 2.105 3.011 2109800800026 2.208 3.296 2109800800027 2.295 3.336 2109800800028 2.382 3.245 2109800800029 2.495 0.057 3.336 2109800800030 2.609 3.273 2109800800031 2.700 3.325 2109800800032 2.800 3.337 2109800800033 2.900 3.504 2109800800034 3.004 0.051 3.428 2109800800035 3.214 3.620 2109800800036 3.400 3.582 2109800800037 3.772 3.682 2109800800038 ENDDATA 16 0 2109800800039 ENDSUBENT 38 0 2109800899999 ENDENTRY 8 0 2109899999999