ENTRY 21371 20120917 22342137100000001 SUBENT 21371001 20120917 22342137100100001 BIB 12 30 2137100100002 INSTITUTE (2UK HAR) Experimental work. 2137100100003 (2UK CAV) Cavendish lab, Gonville and Caius, Cambridge 2137100100004 REFERENCE (J,PRS/A,248,539,1958) 2137100100005 AUTHOR (A.R.Baker) 2137100100006 TITLE A measurement of the neutron-proton capture cross 2137100100007 section 2137100100008 FACILITY .Radio-active source. 2137100100009 INC-SOURCE (PO-BE) Polonium berilium source, in effectively 2137100100010 infinite tanks of water and aqueous boric acid. 2137100100011 Its output at the mid-point of the irradiation was 2137100100012 about 2 x 10**6 neutrons/sec 2137100100013 SAMPLE .Water and aqueous boric acid. 2137100100014 METHOD .From determination of slow neutron density 2137100100015 distributions from a steady source in water and 2137100100016 aqueous boric acid. 2137100100017 DETECTOR (TRD) Boron loaded emulsion. Track counting from the 2137100100018 B-10(n,alpha) reaction, reproducible to 2%. 2137100100019 All the disks were cut from the same 2137100100020 10 in. x 8 in. x 100 mu-m sheet of unbacked emulsion 2137100100021 ERR-ANALYS (ERR-S) .Standard deviations from counting statistics. 2137100100022 Since no significant difference was observed between 2137100100023 results from the two scans (boron-loaded and unloaded 2137100100024 disks), this possible source of systematic error was 2137100100025 assumed to be negligible. 2137100100026 STATUS (TABLE) Data from the text of 2137100100027 Proc.Roy.Soc.London, A248,539,1958 2137100100028 HISTORY (19800215T) 2137100100029 (19800222E) 2137100100030 (20120917A) SD: Updated to new date formats,lower case.2137100100031 Corrected according last EXFOR rules and Dict. 2137100100032 ENDBIB 30 0 2137100100033 NOCOMMON 0 0 2137100100034 ENDSUBENT 33 0 2137100199999 SUBENT 21371002 20120917 22342137100200001 BIB 2 4 2137100200002 REACTION ((5-B-0(N,ABS),,SIG,,MXW)/(1-H-1(N,G)1-H-2,,SIG,,MXW)) 2137100200003 Ratio of boron absorption to proton capture. 2137100200004 CORRECTION .Corrected for recoil proton background, 1.6% 2137100200005 and disturbance of neutron density by detectors. 2137100200006 ENDBIB 4 0 2137100200007 NOCOMMON 0 0 2137100200008 DATA 3 1 2137100200009 EN-DUMMY DATA ERR-S 2137100200010 EV NO-DIM NO-DIM 2137100200011 2.5300E-02 2.3170E+03 2.7000E+01 2137100200012 ENDDATA 3 0 2137100200013 ENDSUBENT 12 0 2137100299999 SUBENT 21371003 20120917 22342137100300001 BIB 4 8 2137100300002 REACTION (1-H-1(N,G)1-H-2,,SIG) Proton capture cross sect. 2137100300003 Value at 2200 m/sec. 2137100300004 MONITOR (5-B-0(N,ABS),,SIG) Value from that of Harwell boron 2137100300005 standard times a factor of 0.985+-0.02 for the 2137100300006 actual boron used in this experiment. 2137100300007 CORRECTION .Corrected for proton recoil background and 2137100300008 disturbance of neutron flux by detectors. 2137100300009 STATUS (DEP,21371002) 2137100300010 ENDBIB 8 0 2137100300011 NOCOMMON 0 0 2137100300012 DATA 5 1 2137100300013 EN MONIT MONIT-ERR DATA ERR-S 2137100300014 EV B B B B 2137100300015 2.5300E-02 7.6900E+02 4.0000E+00 3.2700E-01 4.0000E-03 2137100300016 ENDDATA 3 0 2137100300017 ENDSUBENT 16 0 2137100399999 ENDENTRY 3 0 2137199999999