ENTRY O2328 20191223 O073O232800000001 SUBENT O2328001 20191223 O073O232800100001 BIB 11 34 O232800100002 TITLE Spontaneously fissioning isomers in U, Np, Pu and O232800100003 Am isotopes O232800100004 AUTHOR (N.L.Lark,G.Sletten,J.Pedersen,S.Bjornholm) O232800100005 INSTITUTE (2DENNBI) O232800100006 REFERENCE (J,NP/A,139,481,1969) O232800100007 FACILITY (VDGT,2DENNBI) Tandem Van de Graaff accelerator O232800100008 SAMPLE Thin targets, ~ 10 mu-g/cm2, with good uniformity and O232800100009 stability during long time irradiation with intense O232800100010 beams were used. Targets are produced by vacuum O232800100011 deposition onto nickel and carbon backings from O232800100012 a tungsten crucible heated by electron bombardment. O232800100013 The target thicknesses, 5-30 mu-g/cm2, are determined O232800100014 by alpha-counting in a windowless gas-flow proportionalO232800100015 counter with 2Pi geometry. The thicknesses are also O232800100016 determined from the prompt fission rates in 13 MeV p O232800100017 and d irradiations, using calculated cross sections. O232800100018 DETECTOR (FISCH) The detectors are polycarbonate foils O232800100019 (Makrofol) 0.7 mg/cm 2 thick and a semiconductor O232800100020 counter, recording prompt fission, serves as a monitor O232800100021 (for the first method). O232800100022 (SOLST) Two annular semiconductor counters were used inO232800100023 second method. O232800100024 METHOD Two methods used: O232800100025 1. detection of fission-in-flight from a collimated O232800100026 beam of recoils by means of large plastic detectors O232800100027 sensitive only to fission fragments. O232800100028 2. delayed coincidences between protons and fission O232800100029 fragments from a (d,p) process are recorded, using two O232800100030 annular semiconductor counters and a recoil catcher. O232800100031 ERR-ANALYS Uncertainties in cross sections are estimated O232800100032 to be about +-30% O232800100033 (ERR-1) Uncertainty in target thickness O232800100034 STATUS (TABLE) Tbl.2 from Nucl.Phys.,A139(1969)481 O232800100035 HISTORY (20191223C) SD O232800100036 ENDBIB 34 0 O232800100037 COMMON 1 3 O232800100038 ERR-1 O232800100039 PER-CENT O232800100040 16. O232800100041 ENDCOMMON 3 0 O232800100042 ENDSUBENT 41 0 O232800199999 SUBENT O2328002 20191223 O073O232800200001 BIB 2 2 O232800200002 REACTION (92-U-233(P,2N)93-NP-232,,SIG) O232800200003 SAMPLE (92-U-233,ENR=0.9806) UO2 O232800200004 ENDBIB 2 0 O232800200005 NOCOMMON 0 0 O232800200006 DATA 2 1 O232800200007 EN DATA-MAX O232800200008 MEV MICRO-B O232800200009 13. 0.02 O232800200010 ENDDATA 3 0 O232800200011 ENDSUBENT 10 0 O232800299999 SUBENT O2328003 20191223 O073O232800300001 BIB 2 2 O232800300002 REACTION (92-U-233(D,P)92-U-234,,SIG) O232800300003 SAMPLE (92-U-233,ENR=0.9806) UO2 O232800300004 ENDBIB 2 0 O232800300005 NOCOMMON 0 0 O232800300006 DATA 2 1 O232800300007 EN DATA-MAX O232800300008 MEV MICRO-B O232800300009 13. 0.02 O232800300010 ENDDATA 3 0 O232800300011 ENDSUBENT 10 0 O232800399999 SUBENT O2328004 20191223 O073O232800400001 BIB 2 2 O232800400002 REACTION (92-U-234(P,2N)93-NP-233,,SIG) O232800400003 SAMPLE (92-U-234,ENR=0.7966) UO2 O232800400004 ENDBIB 2 0 O232800400005 NOCOMMON 0 0 O232800400006 DATA 2 1 O232800400007 EN DATA-MAX O232800400008 MEV MICRO-B O232800400009 13. 0.02 O232800400010 ENDDATA 3 0 O232800400011 ENDSUBENT 10 0 O232800499999 SUBENT O2328005 20191223 O073O232800500001 BIB 2 2 O232800500002 REACTION (92-U-234(D,P)92-U-235,,SIG) O232800500003 SAMPLE (92-U-234,ENR=0.7966) UO2 O232800500004 ENDBIB 2 0 O232800500005 NOCOMMON 0 0 O232800500006 DATA 2 1 O232800500007 EN DATA-MAX O232800500008 MEV MICRO-B O232800500009 13. 0.2 O232800500010 ENDDATA 3 0 O232800500011 ENDSUBENT 10 0 O232800599999 SUBENT O2328006 20191223 O073O232800600001 BIB 2 2 O232800600002 REACTION (92-U-235(P,2N)93-NP-234,,SIG) O232800600003 SAMPLE (92-U-235,ENR=0.9752) UO2 O232800600004 ENDBIB 2 0 O232800600005 NOCOMMON 0 0 O232800600006 DATA 2 1 O232800600007 EN DATA-MAX O232800600008 MEV MICRO-B O232800600009 13. 0.02 O232800600010 ENDDATA 3 0 O232800600011 ENDSUBENT 10 0 O232800699999 SUBENT O2328007 20191223 O073O232800700001 BIB 4 4 O232800700002 REACTION (92-U-235(D,P)92-U-236,,SIG) O232800700003 SAMPLE (92-U-235,ENR=0.9752) UO2 O232800700004 FLAG (1.) Measured by ring counter method. O232800700005 ERR-ANALYS (ERR-T) Total uncertainty O232800700006 ENDBIB 4 0 O232800700007 NOCOMMON 0 0 O232800700008 DATA 4 2 O232800700009 EN DATA ERR-T FLAG O232800700010 MEV MICRO-B MICRO-B NO-DIM O232800700011 11. 1.4 0.4 1. O232800700012 13. 1.8 0.3 O232800700013 ENDDATA 4 0 O232800700014 ENDSUBENT 13 0 O232800799999 SUBENT O2328008 20191223 O073O232800800001 BIB 2 2 O232800800002 REACTION (92-U-236(P,2N)93-NP-235,,SIG) O232800800003 SAMPLE (92-U-235,ENR=0.9752) UO2 O232800800004 ENDBIB 2 0 O232800800005 NOCOMMON 0 0 O232800800006 DATA 2 1 O232800800007 EN DATA-MAX O232800800008 MEV MICRO-B O232800800009 13. 0.02 O232800800010 ENDDATA 3 0 O232800800011 ENDSUBENT 10 0 O232800899999 SUBENT O2328009 20191223 O073O232800900001 BIB 2 2 O232800900002 REACTION (92-U-236(D,2N)93-NP-236,,SIG) O232800900003 SAMPLE (92-U-236,ENR=0.9287) UO2 O232800900004 ENDBIB 2 0 O232800900005 NOCOMMON 0 0 O232800900006 DATA 2 1 O232800900007 EN DATA-MAX O232800900008 MEV MICRO-B O232800900009 13. 0.2 O232800900010 ENDDATA 3 0 O232800900011 ENDSUBENT 10 0 O232800999999 SUBENT O2328010 20191223 O073O232801000001 BIB 2 2 O232801000002 REACTION (92-U-236(D,P)92-U-237,,SIG) O232801000003 SAMPLE (92-U-236,ENR=0.9287) UO2 O232801000004 ENDBIB 2 0 O232801000005 NOCOMMON 0 0 O232801000006 DATA 2 1 O232801000007 EN DATA-MAX O232801000008 MEV MICRO-B O232801000009 13. 0.2 O232801000010 ENDDATA 3 0 O232801000011 ENDSUBENT 10 0 O232801099999 SUBENT O2328011 20191223 O073O232801100001 BIB 2 2 O232801100002 REACTION (92-U-238(P,2N)93-NP-237,,SIG) O232801100003 SAMPLE (92-U-238,ENR=0.9951) UO2 O232801100004 ENDBIB 2 0 O232801100005 NOCOMMON 0 0 O232801100006 DATA 2 1 O232801100007 EN DATA-MAX O232801100008 MEV MICRO-B O232801100009 13. 0.1 O232801100010 ENDDATA 3 0 O232801100011 ENDSUBENT 10 0 O232801199999 SUBENT O2328012 20191223 O073O232801200001 BIB 3 3 O232801200002 REACTION (92-U-238(D,N)93-NP-239,,SIG) O232801200003 SAMPLE (92-U-238,ENR=0.9951) UO2 O232801200004 ERR-ANALYS (ERR-T) Total uncertainty O232801200005 ENDBIB 3 0 O232801200006 NOCOMMON 0 0 O232801200007 DATA 3 2 O232801200008 EN DATA ERR-T O232801200009 MEV MICRO-B MICRO-B O232801200010 11. 0.4 0.1 O232801200011 13. 0.87 0.22 O232801200012 ENDDATA 4 0 O232801200013 ENDSUBENT 12 0 O232801299999 SUBENT O2328013 20191223 O073O232801300001 BIB 2 2 O232801300002 REACTION (92-U-238(D,P)92-U-239,,SIG) O232801300003 SAMPLE (92-U-238,ENR=0.9951) UO2 O232801300004 ENDBIB 2 0 O232801300005 NOCOMMON 0 0 O232801300006 DATA 2 1 O232801300007 EN DATA-MAX O232801300008 MEV MICRO-B O232801300009 13. 0.02 O232801300010 ENDDATA 3 0 O232801300011 ENDSUBENT 10 0 O232801399999 SUBENT O2328014 20191223 O073O232801400001 BIB 3 3 O232801400002 REACTION (93-NP-237(P,2N)94-PU-236,,SIG) O232801400003 SAMPLE (93-NP-237,ENR=1.) Np2O3 O232801400004 ERR-ANALYS (ERR-T) Total uncertainty O232801400005 ENDBIB 3 0 O232801400006 NOCOMMON 0 0 O232801400007 DATA 3 1 O232801400008 EN DATA ERR-T O232801400009 MEV MICRO-B MICRO-B O232801400010 13. 0.13 0.03 O232801400011 ENDDATA 3 0 O232801400012 ENDSUBENT 11 0 O232801499999 SUBENT O2328015 20191223 O073O232801500001 BIB 4 4 O232801500002 REACTION (93-NP-237(D,2N)94-PU-237,,SIG) O232801500003 SAMPLE (93-NP-237,ENR=1.) Np2O3 O232801500004 FLAG (1.) Measured by ring counter method. O232801500005 ERR-ANALYS (ERR-T) Total uncertainty O232801500006 ENDBIB 4 0 O232801500007 NOCOMMON 0 0 O232801500008 DATA 4 2 O232801500009 EN DATA ERR-T FLAG O232801500010 MEV MICRO-B MICRO-B NO-DIM O232801500011 11. 1.7 0.6 1. O232801500012 13. 0.7 0.2 O232801500013 ENDDATA 4 0 O232801500014 ENDSUBENT 13 0 O232801599999 SUBENT O2328016 20191223 O073O232801600001 BIB 3 3 O232801600002 REACTION (93-NP-237(D,P)93-NP-238,,SIG) O232801600003 SAMPLE (93-NP-237,ENR=1.) Np2O3 O232801600004 METHOD Measured by ring counter method. O232801600005 ENDBIB 3 0 O232801600006 NOCOMMON 0 0 O232801600007 DATA 2 1 O232801600008 EN DATA-MAX O232801600009 MEV MICRO-B O232801600010 13. 0.03 O232801600011 ENDDATA 3 0 O232801600012 ENDSUBENT 11 0 O232801699999 SUBENT O2328017 20191223 O073O232801700001 BIB 3 3 O232801700002 REACTION (94-PU-239(D,2N)95-AM-239,,SIG) O232801700003 SAMPLE (94-PU-239,ENR=0.9990) PuO2 O232801700004 ERR-ANALYS (ERR-T) Total uncertainty O232801700005 ENDBIB 3 0 O232801700006 NOCOMMON 0 0 O232801700007 DATA 3 1 O232801700008 EN DATA ERR-T O232801700009 MEV MICRO-B MICRO-B O232801700010 13. 1.0 0.3 O232801700011 ENDDATA 3 0 O232801700012 ENDSUBENT 11 0 O232801799999 SUBENT O2328018 20191223 O073O232801800001 BIB 3 3 O232801800002 REACTION (94-PU-239(D,P)94-PU-240,,SIG) O232801800003 SAMPLE (94-PU-239,ENR=0.9990) PuO2 O232801800004 ERR-ANALYS (ERR-T) Total uncertainty O232801800005 ENDBIB 3 0 O232801800006 NOCOMMON 0 0 O232801800007 DATA 3 1 O232801800008 EN DATA ERR-T O232801800009 MEV MICRO-B MICRO-B O232801800010 13. 0.8 0.8 O232801800011 ENDDATA 3 0 O232801800012 ENDSUBENT 11 0 O232801899999 SUBENT O2328019 20191223 O073O232801900001 BIB 3 3 O232801900002 REACTION (94-PU-240(D,P)94-PU-241,,SIG) O232801900003 SAMPLE (94-PU-240,ENR=0.9894) PuO2 O232801900004 ERR-ANALYS (ERR-T) Total uncertainty O232801900005 ENDBIB 3 0 O232801900006 NOCOMMON 0 0 O232801900007 DATA 3 1 O232801900008 EN DATA ERR-T O232801900009 MEV MICRO-B MICRO-B O232801900010 13. 0.50 0.08 O232801900011 ENDDATA 3 0 O232801900012 ENDSUBENT 11 0 O232801999999 SUBENT O2328020 20191223 O073O232802000001 BIB 4 4 O232802000002 REACTION (94-PU-241(D,2N)95-AM-241,,SIG) O232802000003 SAMPLE (94-PU-241,ENR=0.9575) PuO2 O232802000004 FLAG (1.) Measured by ring counter method. O232802000005 ERR-ANALYS (ERR-T) Total uncertainty O232802000006 ENDBIB 4 0 O232802000007 NOCOMMON 0 0 O232802000008 DATA 4 2 O232802000009 EN DATA ERR-T FLAG O232802000010 MEV MICRO-B MICRO-B NO-DIM O232802000011 11. 2.1 0.8 1. O232802000012 13. 2.0 0.6 O232802000013 ENDDATA 4 0 O232802000014 ENDSUBENT 13 0 O232802099999 SUBENT O2328021 20191223 O073O232802100001 BIB 4 4 O232802100002 REACTION (94-PU-241(D,P)94-PU-242,,SIG) O232802100003 SAMPLE (94-PU-241,ENR=0.9575) PuO2 O232802100004 FLAG (1.) Measured by ring counter method. O232802100005 ERR-ANALYS (ERR-T) Total uncertainty O232802100006 ENDBIB 4 0 O232802100007 NOCOMMON 0 0 O232802100008 DATA 4 2 O232802100009 EN DATA ERR-T FLAG O232802100010 MEV MICRO-B MICRO-B NO-DIM O232802100011 11. 0.8 0.4 1. O232802100012 13. 0.50 0.08 O232802100013 ENDDATA 4 0 O232802100014 ENDSUBENT 13 0 O232802199999 SUBENT O2328022 20191223 O073O232802200001 BIB 4 4 O232802200002 REACTION (94-PU-242(P,2N)95-AM-241,,SIG) O232802200003 SAMPLE (94-PU-242,ENR=0.9988) PuO2 O232802200004 FLAG (1.) Measured by ring counter method. O232802200005 ERR-ANALYS (ERR-T) Total uncertainty O232802200006 ENDBIB 4 0 O232802200007 NOCOMMON 0 0 O232802200008 DATA 4 2 O232802200009 EN DATA ERR-T FLAG O232802200010 MEV MICRO-B MICRO-B NO-DIM O232802200011 12. 5.8 1.9 1. O232802200012 13. 12.0 4. O232802200013 ENDDATA 4 0 O232802200014 ENDSUBENT 13 0 O232802299999 SUBENT O2328023 20191223 O073O232802300001 BIB 4 4 O232802300002 REACTION (94-PU-242(D,P)94-PU-243,,SIG) O232802300003 SAMPLE (94-PU-242,ENR=0.9988) PuO2 O232802300004 FLAG (1.) Measured by ring counter method. O232802300005 ERR-ANALYS (ERR-T) Total uncertainty O232802300006 ENDBIB 4 0 O232802300007 NOCOMMON 0 0 O232802300008 DATA 4 2 O232802300009 EN DATA ERR-T FLAG O232802300010 MEV MICRO-B MICRO-B NO-DIM O232802300011 12. 2.5 0.8 1. O232802300012 13. 1.5 0.4 O232802300013 ENDDATA 4 0 O232802300014 ENDSUBENT 13 0 O232802399999 ENDENTRY 23 0 O232899999999