ENTRY C2837 20221021 C224C2837000 1 SUBENT C2837001 20221021 C224C2837001 1 BIB 10 39 C2837001 2 TITLE The Disintegration of Li7 by Deuterons C2837001 3 AUTHOR (W.E.Bennett,T.W.Bonner,H.T.Richards,B.E.Watt) C2837001 4 REFERENCE (J,PR,71,11,1947) C2837001 5 #doi:10.1103/PhysRev.71.11 C2837001 6 REL-REF (A,C2842001,L.H.Rumbaugh+,J,PR,54,657,1938) C2837001 7 (C,C2843001,W.E.Bennett+,J,PR,59,781,1941) C2837001 8 INSTITUTE (1USARIC) C2837001 9 FACILITY (VDG,1USARIC) The Rice Institute pressure Van de GraaffC2837001 10 machine. C2837001 11 DETECTOR (GEMUC) The yields of beta- and gamma-rays were C2837001 12 measured with Geiger counters filled with a self C2837001 13 quenching mixture of argon and alcohol. C2837001 14 SAMPLE Thin targets of LiCl, LiOH, and metallic lithium were C2837001 15 used. They were produced by evaporation from a C2837001 16 tungsten filament onto a polished disk of pure silver C2837001 17 or copper. The LiC1 targets blackened rapidly during C2837001 18 bombardment and the yield of neutrons increased with C2837001 19 time as a result of the deposition of carbon. These C2837001 20 targets were made thicker (50-100 keV) than the C2837001 21 metallic lithium targets which were used later so C2837001 22 that the carbon would have a relatively small effect. C2837001 23 METHOD (COINC) The single counter was used to take a lead C2837001 24 absorption curve under good geometrical conditions C2837001 25 and the radiation seemed to be homogeneous. The C2837001 26 450-keV radiation was too feeble to give a noticeable C2837001 27 effect under our conditions. The single Geiger C2837001 28 counter did not respond appreciably to neutrons. A C2837001 29 block of paraffin which reduced the neutron intensity C2837001 30 to half, did not affect the counting rate in the C2837001 31 Geiger counter. The neutrons produced radioactivity C2837001 32 in the counter walls, but this was subtracted as part C2837001 33 of the natural effect. To detect 4.9-MeV gamma-rays C2837001 34 in the presence of 450-keV gamma-rays, coincidence C2837001 35 counters were used, the wall thickness being C2837001 36 sufficient to prevent detection of gamma-rays of less C2837001 37 than 2-MeV energy. However, this procedure was found C2837001 38 unnecessary and a single Geiger counter was used for C2837001 39 the final data. C2837001 40 HISTORY (20221021C) BP C2837001 41 ENDBIB 39 0 C2837001 42 NOCOMMON 0 0 C2837001 43 ENDSUBENT 42 0 C283700199999 SUBENT C2837002 20221021 C224C2837002 1 BIB 3 4 C2837002 2 REACTION (3-LI-0(D,X)0-G-0,,SIG,,REL) C2837002 3 SAMPLE The thickness of the targets was 55 keV for the C2837002 4 gamma-ray curve. C2837002 5 STATUS (CURVE) Fig. 2, page 13 of J,PR,71,11,1947. C2837002 6 ENDBIB 4 0 C2837002 7 NOCOMMON 0 0 C2837002 8 DATA 2 28 C2837002 9 EN DATA C2837002 10 MEV ARB-UNITS C2837002 11 0.498 0.701 C2837002 12 0.548 1.029 C2837002 13 0.598 1.431 C2837002 14 0.648 2.244 C2837002 15 0.694 3.070 C2837002 16 0.746 3.473 C2837002 17 0.796 3.537 C2837002 18 0.845 3.542 C2837002 19 0.896 3.871 C2837002 20 0.948 4.082 C2837002 21 0.996 5.026 C2837002 22 1.047 5.326 C2837002 23 1.099 5.052 C2837002 24 1.145 4.074 C2837002 25 1.196 3.669 C2837002 26 1.246 3.351 C2837002 27 1.296 3.416 C2837002 28 1.346 3.348 C2837002 29 1.398 3.383 C2837002 30 1.446 3.755 C2837002 31 1.499 3.761 C2837002 32 1.548 4.016 C2837002 33 1.599 4.344 C2837002 34 1.649 4.658 C2837002 35 1.700 5.221 C2837002 36 1.747 5.461 C2837002 37 1.797 5.980 C2837002 38 1.850 6.177 C2837002 39 ENDDATA 30 0 C2837002 40 ENDSUBENT 39 0 C283700299999 SUBENT C2837003 20221021 C224C2837003 1 BIB 3 4 C2837003 2 REACTION (3-LI-0(D,X)0-NN-1,,DA,,REL) C2837003 3 SAMPLE The thickness of the targets was 90 keV for the C2837003 4 neutron curve. C2837003 5 STATUS (CURVE) Fig. 2, page 13 of J,PR,71,11,1947. C2837003 6 ENDBIB 4 0 C2837003 7 COMMON 1 3 C2837003 8 ANG C2837003 9 ADEG C2837003 10 0.0 C2837003 11 ENDCOMMON 3 0 C2837003 12 DATA 2 28 C2837003 13 EN DATA C2837003 14 MEV ARB-UNITS C2837003 15 0.498 1.097 C2837003 16 0.547 1.513 C2837003 17 0.598 2.209 C2837003 18 0.645 3.050 C2837003 19 0.698 4.113 C2837003 20 0.728 5.012 C2837003 21 0.796 5.738 C2837003 22 0.846 5.597 C2837003 23 0.906 5.985 C2837003 24 0.947 6.371 C2837003 25 0.996 7.008 C2837003 26 1.049 7.527 C2837003 27 1.099 7.049 C2837003 28 1.150 6.276 C2837003 29 1.196 5.254 C2837003 30 1.248 4.672 C2837003 31 1.298 4.634 C2837003 32 1.346 4.375 C2837003 33 1.399 4.219 C2837003 34 1.448 4.489 C2837003 35 1.501 4.524 C2837003 36 1.549 4.603 C2837003 37 1.600 5.049 C2837003 38 1.648 5.230 C2837003 39 1.700 5.471 C2837003 40 1.749 5.843 C2837003 41 1.797 6.465 C2837003 42 1.849 6.647 C2837003 43 ENDDATA 30 0 C2837003 44 ENDSUBENT 43 0 C283700399999 SUBENT C2837004 20221021 C224C2837004 1 BIB 3 3 C2837004 2 REACTION (3-LI-0(D,X)0-NN-1,,DA,,REL) C2837004 3 SAMPLE "Thin" lithium targets. C2837004 4 STATUS (CURVE) Fig. 3, page 13 of J,PR,71,11,1947. C2837004 5 ENDBIB 3 0 C2837004 6 COMMON 1 3 C2837004 7 ANG C2837004 8 ADEG C2837004 9 0.0 C2837004 10 ENDCOMMON 3 0 C2837004 11 DATA 2 18 C2837004 12 EN DATA C2837004 13 MEV ARB-UNITS C2837004 14 0.644 5.113 C2837004 15 0.697 5.330 C2837004 16 0.747 5.379 C2837004 17 0.795 5.480 C2837004 18 0.847 5.710 C2837004 19 0.901 5.772 C2837004 20 0.928 6.042 C2837004 21 0.949 6.582 C2837004 22 0.972 6.891 C2837004 23 0.994 7.896 C2837004 24 1.017 8.256 C2837004 25 1.039 7.571 C2837004 26 1.058 6.578 C2837004 27 1.080 5.984 C2837004 28 1.102 5.390 C2837004 29 1.123 4.770 C2837004 30 1.146 4.588 C2837004 31 1.173 4.780 C2837004 32 ENDDATA 20 0 C2837004 33 ENDSUBENT 32 0 C283700499999 SUBENT C2837005 20221021 C224C2837005 1 BIB 3 3 C2837005 2 REACTION (3-LI-0(D,X)0-NN-1,,DA,,REL) C2837005 3 SAMPLE "thin" lithium targets. C2837005 4 STATUS (CURVE) Fig. 3, page 13 of J,PR,71,11,1947. C2837005 5 ENDBIB 3 0 C2837005 6 COMMON 1 3 C2837005 7 ANG C2837005 8 ADEG C2837005 9 90.0 C2837005 10 ENDCOMMON 3 0 C2837005 11 DATA 2 23 C2837005 12 EN DATA C2837005 13 MEV ARB-UNITS C2837005 14 0.547 2.461 C2837005 15 0.595 3.568 C2837005 16 0.648 4.984 C2837005 17 0.698 5.213 C2837005 18 0.746 5.160 C2837005 19 0.794 5.003 C2837005 20 0.845 4.949 C2837005 21 0.903 4.882 C2837005 22 0.933 4.933 C2837005 23 0.952 5.319 C2837005 24 0.984 5.678 C2837005 25 1.001 6.116 C2837005 26 1.028 6.102 C2837005 27 1.045 5.405 C2837005 28 1.063 4.759 C2837005 29 1.082 4.372 C2837005 30 1.096 4.204 C2837005 31 1.147 3.840 C2837005 32 1.196 3.658 C2837005 33 1.246 3.385 C2837005 34 1.298 3.344 C2837005 35 1.347 3.290 C2837005 36 1.396 3.236 C2837005 37 ENDDATA 25 0 C2837005 38 ENDSUBENT 37 0 C283700599999 SUBENT C2837006 20221021 C224C2837006 1 BIB 4 4 C2837006 2 REACTION (3-LI-7(D,P)3-LI-8,,SIG,,REL) C2837006 3 SAMPLE "thin" lithium targets. C2837006 4 PART-DET (B-) 8Li->8Be + beta ray. C2837006 5 STATUS (CURVE) Fig. 3, page 13 of J,PR,71,11,1947. C2837006 6 ENDBIB 4 0 C2837006 7 NOCOMMON 0 0 C2837006 8 DATA 2 23 C2837006 9 EN DATA C2837006 10 MEV ARB-UNITS C2837006 11 0.552 0.810 C2837006 12 0.597 1.595 C2837006 13 0.648 2.869 C2837006 14 0.698 4.040 C2837006 15 0.746 4.605 C2837006 16 0.797 4.513 C2837006 17 0.846 3.956 C2837006 18 0.904 3.773 C2837006 19 0.936 3.759 C2837006 20 0.953 3.874 C2837006 21 0.983 4.170 C2837006 22 1.005 4.478 C2837006 23 1.028 4.516 C2837006 24 1.046 3.896 C2837006 25 1.062 3.715 C2837006 26 1.083 3.701 C2837006 27 1.097 3.610 C2837006 28 1.147 3.531 C2837006 29 1.199 3.529 C2837006 30 1.248 3.733 C2837006 31 1.296 4.337 C2837006 32 1.347 4.528 C2837006 33 1.399 4.513 C2837006 34 ENDDATA 25 0 C2837006 35 ENDSUBENT 34 0 C283700699999 SUBENT C2837007 20221021 C224C2837007 1 BIB 3 15 C2837007 2 REACTION (3-LI-7(D,0),,EN) C2837007 3 ANALYSIS Resonances were found at 0.65, 1.02, and 1.35 MeV C2837007 4 corresponding to excited states of the intermediate C2837007 5 nucleus (Be9) at 17.14, 17.43, and 17.69 MeV. The C2837007 6 resonance at 1.35 MeV was found only for the C2837007 7 formation of radioactive Li8 accompanied by the C2837007 8 emission of a proton. Apparently proton emission is C2837007 9 permitted and neutron emission forbidden from the C2837007 10 17.69-MeV state. C2837007 11 STATUS (DEP,C2837002) C2837007 12 (DEP,C2837003) C2837007 13 (DEP,C2837004) C2837007 14 (DEP,C2837005) C2837007 15 (DEP,C2837006) C2837007 16 (TABLE) pages 13-14 of J,PR,71,11,1947. C2837007 17 ENDBIB 15 0 C2837007 18 NOCOMMON 0 0 C2837007 19 DATA 1 3 C2837007 20 DATA C2837007 21 MEV C2837007 22 0.65 C2837007 23 1.02 C2837007 24 1.35 C2837007 25 ENDDATA 5 0 C2837007 26 ENDSUBENT 25 0 C283700799999 ENDENTRY 7 0 C283799999999