ENTRY C2464 20200213 C190C246400000001 SUBENT C2464001 20200213 C190C246400100001 BIB 13 33 C246400100002 TITLE Spontaneously fissioning isomers in 237Pu C246400100003 AUTHOR (J.K.Temperley,J.A.Morrissey,S.L.Bacharach) C246400100004 REFERENCE (J,NP/A,175,433,1971) C246400100005 #doi:10.1016/0375-9474(71)90295-8 C246400100006 INSTITUTE (1USABRL,1USACUA) C246400100007 FACILITY (CCW,1USANDL) The USANDL Cockcroft-Walton facility. C246400100008 INC-SPECT A pulsed-and-bunched deuteron beam at eight energies C246400100009 between 8.5 and 14.5 MeV. The pulse width was C246400100010 typically 3 ns (FWHM). Pulse repetition rates of 0.5 C246400100011 and 1 MHz were used. C246400100012 SAMPLE The targets consisted of 40 microg/cm2 237Np on 200 C246400100013 microg/cm2 Ni backings. C246400100014 DETECTOR (SIBAR) Four 600 mm2 surface-barrier fission C246400100015 detectors (160 microm depletion depth) were placed C246400100016 symmetrically around the target in the target plane. C246400100017 PART-DET (FF) C246400100018 METHOD (REC,TOF) These detectors observed fission fragments C246400100019 emitted from 237mPu nuclei recoiling out of the C246400100020 target and decaying either in flight or after being C246400100021 stopped on the catcher foil. Prompt fission events C246400100022 occurring in the target were monitored with a 100 mm2, C246400100023 160 microm depletion-depth surface-barrier fission C246400100024 detector located at 167.5 degree with respect to the C246400100025 deuteron beam. C246400100026 ERR-ANALYS (DATA-ERR) A large uncertainty must be placed on C246400100027 these cross sections, since the thickness of the C246400100028 targets (40 microg/cm2 237Np) precludes a precise C246400100029 determination of the fraction of 237mPu nuclides C246400100030 which recoil out of the target. C246400100031 DECAY-DATA (94-PU-237-L1,114.0NSEC,SF) C246400100032 (94-PU-237-L2,950.0NSEC,SF) Both fissioning isomers C246400100033 T1/2 were measured by authors. C246400100034 HISTORY (20200213C) BP C246400100035 ENDBIB 33 0 C246400100036 NOCOMMON 0 0 C246400100037 ENDSUBENT 36 0 C246400199999 SUBENT C2464002 20200213 C190C246400200001 BIB 2 2 C246400200002 REACTION (93-NP-237(D,2N)94-PU-237-L1/L2,,SIG/RAT) C246400200003 STATUS (CURVE) Fig. 2, page 436. C246400200004 ENDBIB 2 0 C246400200005 NOCOMMON 0 0 C246400200006 DATA 3 8 C246400200007 EN DATA DATA-ERR C246400200008 MEV NO-DIM NO-DIM C246400200009 8.494 3.803 2.263 C246400200010 8.987 4.539 1.237 C246400200011 9.987 2.118 0.605 C246400200012 10.987 3.211 0.947 C246400200013 11.987 2.421 1.039 C246400200014 12.987 1.737 0.724 C246400200015 14.000 1.184 0.237 C246400200016 14.481 1.618 0.342 C246400200017 ENDDATA 10 0 C246400200018 ENDSUBENT 17 0 C246400299999 SUBENT C2464003 20200213 C190C246400300001 BIB 2 3 C246400300002 REACTION ((93-NP-237(D,2N)94-PU-237-L1,,SIG)/ C246400300003 (93-NP-237(D,F),,SIG)) C246400300004 STATUS (CURVE) Fig. 3, page 437. C246400300005 ENDBIB 3 0 C246400300006 NOCOMMON 0 0 C246400300007 DATA 3 8 C246400300008 EN DATA DATA-ERR C246400300009 MEV NO-DIM NO-DIM C246400300010 8.485 3048000. 653800. C246400300011 8.983 3833000. 394700. C246400300012 9.993 2021000. 272700. C246400300013 10.989 2200000. 226500. C246400300014 11.998 1293000. 133200. C246400300015 12.994 657700. 74800. C246400300016 13.978 619100. 77000. C246400300017 14.489 405800. 41780. C246400300018 ENDDATA 10 0 C246400300019 ENDSUBENT 18 0 C246400399999 SUBENT C2464004 20200213 C190C246400400001 BIB 2 3 C246400400002 REACTION ((93-NP-237(D,2N)94-PU-237-L2,,SIG)/ C246400400003 (93-NP-237(D,F),,SIG)) C246400400004 STATUS (CURVE) Fig. 3, page 437. C246400400005 ENDBIB 3 0 C246400400006 NOCOMMON 0 0 C246400400007 DATA 3 8 C246400400008 EN DATA DATA-ERR C246400400009 MEV NO-DIM NO-DIM C246400400010 8.491 80750000. 45830000. C246400400011 8.978 84700000. 18280000. C246400400012 10.005 94320000. 21240000. C246400400013 11.004 67820000. 15280000. C246400400014 12.004 57810000. 12470000. C246400400015 13.003 44720000. 10900000. C246400400016 14.003 41500000. 7336000. C246400400017 14.502 24300000. 2780000. C246400400018 ENDDATA 10 0 C246400400019 ENDSUBENT 18 0 C246400499999 ENDENTRY 4 0 C246499999999