ENTRY 10089 20170822 14311008900000001 SUBENT 10089001 20170822 14311008900100001 BIB 9 15 1008900100002 AUTHOR (F.P.Mooring,J.E.Monahan,R.E.Segel) 1008900100003 TITLE Properties of the 3.39-MeV state in B12 1008900100004 REFERENCE (J,PR,178,1612,1969) 1008900100005 #doi:10.1103/PhysRev.178.1612 1008900100006 INSTITUTE (1USAANL,1USANWU) 1008900100007 FACILITY (VDG) Van de Graaff generator. 1008900100008 INC-SOURCE (P-LI7) 7Li(p,n)7Be reaction. 1008900100009 SAMPLE Boron sample, arial density 0.864 g/cm**2. 1008900100010 STATUS (APRVD) Approved by author 1008900100011 HISTORY (19730925C) 1008900100012 (19811125A) converted to reaction formalism 1008900100013 (19991013A) converted to new data formalism. 1008900100014 (20130503A) BP: corrections according last EXFOR rules 1008900100015 and Dict. Updated subentries, digitized Fig.3,4. 1008900100016 (20170820A) OS. Added parameter in sub.4 1008900100017 ENDBIB 15 0 1008900100018 NOCOMMON 0 0 1008900100019 ENDSUBENT 18 0 1008900199999 SUBENT 10089002 20130503 13911008900200001 BIB 4 15 1008900200002 REACTION 1(5-B-11(N,0),,J) 1008900200003 2(5-B-11(N,0),,PTY) 1008900200004 3(5-B-11(N,EL),,WID) 1008900200005 4(5-B-11(N,G),,WID) 1008900200006 ANALYSIS The 3.39-MeV state in B12 has been studied in the 1008900200007 B12+n system, where the state appears as a resonance 1008900200008 at a (lab) neutron energy of 20.8+-0.5 keV. 1008900200009 Scattering and transmission measurements were 1008900200010 compared with 11B(d,p) data and were used to 1008900200011 determine that resonance was d-wave. Spin J=3- 1008900200012 determined by ruling out other alternatives. For each 1008900200013 possible j value a neutron width was calculated from 1008900200014 the data. 1008900200015 ERR-ANALYS (DATA-ERR) No details are given. 1008900200016 STATUS (TABLE) Data taken from text of reference. 1008900200017 ENDBIB 15 0 1008900200018 NOCOMMON 0 0 1008900200019 DATA 8 1 1008900200020 EN-RES EN-RES-ERR DATA 1DATA 2DATA 3DATA-ERR 31008900200021 DATA 4DATA-ERR 4 1008900200022 KEV KEV NO-DIM NO-DIM EV EV 1008900200023 EV EV 1008900200024 20.8 0.5 3.0 -1. 3.1 0.61008900200025 0.025 0.008 1008900200026 ENDDATA 6 0 1008900200027 ENDSUBENT 26 0 1008900299999 SUBENT 10089003 20130503 13911008900300001 BIB 8 32 1008900300002 REACTION (5-B-11(N,G)5-B-12,,SIG) 1008900300003 INC-SPECT Energy resolution about 7 keV. 1008900300004 Beam chopped for capture measurements so as to give 1008900300005 27 msec bursts separated by 53 msec. 1008900300006 METHOD (ACTIV) Capture was measured by detecting residual 1008900300007 12B activity. The active region of the boron sample 1008900300008 was defined in the vertical direction 1008900300009 (i.e., perpendicular to the plane of the neutron and 1008900300010 proton beams) by the edges of the scintillator and in 1008900300011 the horizontal direction by a lead slit. The lead 1008900300012 slit was curved so that the center line followed a 1008900300013 constant neutron energy. Output pulses from the 1008900300014 photomultiplier were amplified and then fed into a 1008900300015 single-channel pulse-height analyzer, whose output 1008900300016 was fed into a multichannel analyzer operating in the 1008900300017 multiscaler mode with a time scale of 1 msec/channel. 1008900300018 The start and stop of the counting by the 1008900300019 multichannel analyzer was synchronized with the 1008900300020 mechanical beam chopper so that the activity was 1008900300021 measured between beam bursts. Runs were taken for a 1008900300022 fixed number of monitor counts both with the boron 1008900300023 sample in and with it out. The sample-out 1008900300024 multichannel (time) spectra were subtracted from 1008900300025 those taken with the sample in; the resultant (time) 1008900300026 spectra were dominated by the B12 activity. 1008900300027 DECAY-DATA (5-B-12,20.3E-3SEC,B-) 1008900300028 PART-DET (E) 1008900300029 DETECTOR (SCIN) Plastic scintillator, 5 in. diameter by 2 in. 1008900300030 thick, cemented to a phototube. 1008900300031 STATUS (CURVE) Fig. 4, page 1614. 1008900300032 HISTORY (19991013C) 1008900300033 (20130503A) Updated, digitized Fig.4. 1008900300034 ENDBIB 32 0 1008900300035 COMMON 1 3 1008900300036 EN-RSL 1008900300037 KEV 1008900300038 7.0 1008900300039 ENDCOMMON 3 0 1008900300040 DATA 2 15 1008900300041 EN DATA 1008900300042 KEV MICRO-B 1008900300043 1.007E+01 5.073E+01 1008900300044 1.218E+01 5.531E+01 1008900300045 1.489E+01 6.575E+01 1008900300046 1.596E+01 1.427E+02 1008900300047 1.887E+01 2.995E+02 1008900300048 2.161E+01 2.274E+02 1008900300049 2.165E+01 3.419E+02 1008900300050 2.469E+01 1.378E+02 1008900300051 2.768E+01 9.613E+01 1008900300052 3.048E+01 7.469E+01 1008900300053 3.550E+01 2.886E+01 1008900300054 3.982E+01 3.802E+01 1008900300055 4.550E+01 1.690E+01 1008900300056 4.991E+01 1.014E+01 1008900300057 5.491E+01 2.662E+01 1008900300058 ENDDATA 17 0 1008900300059 ENDSUBENT 58 0 1008900399999 SUBENT 10089004 20170822 14311008900400001 BIB 8 19 1008900400002 REACTION (5-B-11(N,TOT),,TRN) 1008900400003 INC-SPECT Energy resolution about 1 keV. 1008900400004 PART-DET (N) 1008900400005 DETECTOR (BF3) System of moderated BF3 counters used. 1008900400006 METHOD (TRN) The apparatus has been used in a number of fast 1008900400007 neutron experiments. A sample, which may or may not 1008900400008 consist of the element being investigated, scatters 1008900400009 the neutrons into a system of moderated BF3 counters. 1008900400010 Another sample can be placed in front of the entire 1008900400011 system so that transmission measurements are possible 1008900400012 as well. Background is measured by removing the 1008900400013 scattering sample. All sample changing is remotely 1008900400014 controlled. 1008900400015 ERR-ANALYS (DATA-ERR) No details are given. 1008900400016 STATUS (CURVE) Fig. 3, page 1614. 1008900400017 HISTORY (19991013C) 1008900400018 (20130503A) Updated, digitized Fig.3, corrected 1008900400019 reaction code for transmission measurement. 1008900400020 (20170820A) OS. Added THICKNESS 1008900400021 ENDBIB 19 0 1008900400022 COMMON 2 3 1008900400023 EN-RSL THICKNESS 1008900400024 KEV G/CM-SQ 1008900400025 1.0 0.864 1008900400026 ENDCOMMON 3 0 1008900400027 DATA 3 14 1008900400028 EN DATA DATA-ERR 1008900400029 KEV NO-DIM NO-DIM 1008900400030 1.489E+01 5.476E-01 2.970E-03 1008900400031 1.686E+01 5.599E-01 1.975E-03 1008900400032 1.791E+01 5.495E-01 1.583E-03 1008900400033 1.889E+01 5.547E-01 2.973E-03 1008900400034 1.942E+01 5.444E-01 2.965E-03 1008900400035 1.994E+01 5.450E-01 1.979E-03 1008900400036 2.047E+01 5.357E-01 1.977E-03 1008900400037 2.094E+01 5.387E-01 1.581E-03 1008900400038 2.141E+01 5.413E-01 2.173E-03 1008900400039 2.196E+01 5.453E-01 3.165E-03 1008900400040 2.247E+01 5.522E-01 3.365E-03 1008900400041 2.289E+01 5.588E-01 1.980E-03 1008900400042 2.393E+01 5.550E-01 2.175E-03 1008900400043 2.594E+01 5.621E-01 3.165E-03 1008900400044 ENDDATA 16 0 1008900400045 ENDSUBENT 44 0 1008900499999 ENDENTRY 4 0 1008999999999