ENTRY 23361 20171030 22682336100000001 SUBENT 23361001 20171030 22682336100100001 BIB 17 58 2336100100002 REFERENCE (J,NP/A,222,621,1974) 2336100100003 AUTHOR (E.Roeckl,P.F.Dittner,R.Klapisch,C.Thibault,C.Rigaud, 2336100100004 R.Prieels) 2336100100005 TITLE Delayed neutron emission from the decay of neutron-rich2336100100006 Rb and Cs isotopes 2336100100007 INSTITUTE (2FR CSN) R.Klapisch,C.Thibault,C.Rigaud 2336100100008 (2GERGSI) E.Roeckl 2336100100009 (2GERMNZ) P.F.Dittner 2336100100010 (2BLGLVN) R.Prieels 2336100100011 FACILITY (ISOCY,2BLGLVN) Isochronus cyclotron "Cyclone". 2336100100012 1-5 muA, 100 MeV external alpha-beam, 0.1 sec beam 2336100100013 pulses 2336100100014 (SYNCH,2ZZZCER) 24 GeV proton beam ag CERN proton 2336100100015 synchrotron, 2.1 musec pulses every 10 sec. 2336100100016 REL-REF (I,,C.Thibault-Philippe+,T,THIBAULT-PHILIPPE,1971) 2336100100017 Orsay, unpublished. 2336100100018 (I,,C.Rigaud,T,RIGAUD,1972) These de 3e Cycle, Orsay. 2336100100019 Two refs. for on-line mass spectrometer details. 2336100100020 METHOD (OLMS,COINC) On-line mass separation. 2336100100021 Beta-neutron and neutron-neutron coincidence. 2336100100022 PART-DET (DN,B) 2336100100023 DETECTOR (SCIN) Beta-neutron detector array. 2336100100024 5cm diameter, 0.3 mm thickness NE102A plastic 2336100100025 scintillator, beta detection efficiency 20% . 2336100100026 (HE3SP) Eight He-3 proportional counters in paraffin 2336100100027 moderator, shielded by Cd sheet and paraffin layer. 2336100100028 an counters for beta rays . Absolute neutron detection 2336100100029 probability ~10% (measured with Am-Li standard source).2336100100030 (MAGSP) On-line mass spectrometer in both experiments. 2336100100031 ANALYSIS Neutron multiscaling curves(NMC) and beta multiscaling 2336100100032 curves (BMC) were produced. NMC had one component, 2336100100033 excluding mass 98 (Sr, Y) . 2336100100034 BMC were fitted to exp.points using previously 2336100100035 measured or estimated Pn as trial value. By iteration 2336100100036 of Pn the intensity of precursor component of BMC was 2336100100037 obtained. 2336100100038 Pn value was determined from the ratio of neutron and2336100100039 beta intensities In, Ibeta and detection efficiencies 2336100100040 EPSbeta, EPSn ratio : 2336100100041 Pn=(In/Ibeta)*(EPSbeta/EPSn) 2336100100042 Ratio EPSbeta/EPSn was determined by the previously 2336100100043 measured Pn for Li-9 ( see REL-REF Y.S.Chen+) and 2336100100044 In/Ibeta for Li-9 measured at this experiment. 2336100100045 MONITOR (3-LI-9(0,B-)4-BE-9,,PN) 2336100100046 MONIT-REF (,Y.S.Chen+,J,NP/A,146,136,1970) 2336100100047 Pn for Li-9 . 2336100100048 DECAY-DATA (3-LI-9,175.MSEC) 175+-1 millisec 2336100100049 CORRECTION For background. 2336100100050 ERR-ANALYS (DATA-ERR) Error includes : 2336100100051 - statistical error intensities In and Ibeta, 2336100100052 (ERR-1) error of the efficiency calibration . 2336100100053 1% error of In/Ibeta was considered as negligible. 2336100100054 Neutron energy dependence of detector efficiency and 2336100100055 its possible effect on Pn is not included. 2336100100056 ADD-RES (THEO) Table 2 - Pn calculated in the frames of beta- 2336100100057 strength function concept and parameters used in this 2336100100058 calculations. 2336100100059 HISTORY (20171030C) M.M. 2336100100060 ENDBIB 58 0 2336100100061 COMMON 3 3 2336100100062 MONIT MONIT-ERR ERR-1 2336100100063 NO-DIM NO-DIM PER-CENT 2336100100064 0.350 0.035 10. 2336100100065 ENDCOMMON 3 0 2336100100066 ENDSUBENT 65 0 2336100199999 SUBENT 23361002 20171030 22682336100200001 BIB 4 7 2336100200002 REACTION (37-RB-93(0,B-)38-SR-93,,PN) 2336100200003 DECAY-DATA (37-RB-93,6390.MSEC) 6390+-350 millisec, measured 2336100200004 REL-REF (D,,S.Amiel+,C,67VIENNA,,115,1967) 2.6+-0.4 % 2336100200005 (A,,W.L.Talbert Jr+,J,PR,177,1805,1969) 1.65+-0.30 % 2336100200006 (A,23360003,I.Amarel+,J,JIN,31,577,1969) 1.43+-0.18 % 2336100200007 (D,23357013,H.D.Schuessler+,J,RCA,18,123,1972) 2.1+-0.62336100200008 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100200009 ENDBIB 7 0 2336100200010 NOCOMMON 0 0 2336100200011 DATA 2 1 2336100200012 DATA DATA-ERR 2336100200013 NO-DIM NO-DIM 2336100200014 1.24E-2 0.14E-2 2336100200015 ENDDATA 3 0 2336100200016 ENDSUBENT 15 0 2336100299999 SUBENT 23361003 20171030 22682336100300001 BIB 4 5 2336100300002 REACTION (37-RB-94(0,B-)38-SR-94,,PN) 2336100300003 DECAY-DATA (37-RB-94,2755.MSEC) 2755+-80 millisec, measured 2336100300004 REL-REF (D,23360014,I.Amarel+,J,JIN,31,577,1969) 11.1+-1.1 % 2336100300005 (D,23357014,H.D.Schuessler+,J,RCA,18,123,1972) 11.+-2. 2336100300006 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100300007 ENDBIB 5 0 2336100300008 NOCOMMON 0 0 2336100300009 DATA 2 1 2336100300010 DATA DATA-ERR 2336100300011 NO-DIM NO-DIM 2336100300012 8.46E-2 0.92E-2 2336100300013 ENDDATA 3 0 2336100300014 ENDSUBENT 13 0 2336100399999 SUBENT 23361004 20171030 22682336100400001 BIB 4 4 2336100400002 REACTION (37-RB-95(0,B-)38-SR-95,,PN) 2336100400003 DECAY-DATA (37-RB-95,383.2MSEC) 383.2+-6.0 millisec, measured 2336100400004 REL-REF (A,23360005,I.Amarel+,J,JIN,31,577,1969) 7.10+-0.93 % 2336100400005 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100400006 ENDBIB 4 0 2336100400007 NOCOMMON 0 0 2336100400008 DATA 2 1 2336100400009 DATA DATA-ERR 2336100400010 NO-DIM NO-DIM 2336100400011 8.54E-2 0.91E-2 2336100400012 ENDDATA 3 0 2336100400013 ENDSUBENT 12 0 2336100499999 SUBENT 23361005 20171030 22682336100500001 BIB 4 4 2336100500002 REACTION (37-RB-96(0,B-)38-SR-96,,PN) 2336100500003 DECAY-DATA (37-RB-96,199.0MSEC) 199.0+-3.5 millisec, measured 2336100500004 REL-REF (A,23360007,I.Amarel+,J,JIN,31,577,1969) 12.7+-1.5 % 2336100500005 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100500006 ENDBIB 4 0 2336100500007 NOCOMMON 0 0 2336100500008 DATA 2 1 2336100500009 DATA DATA-ERR 2336100500010 NO-DIM NO-DIM 2336100500011 13.0E-2 1.4E-2 2336100500012 ENDDATA 3 0 2336100500013 ENDSUBENT 12 0 2336100599999 SUBENT 23361006 20171030 22682336100600001 BIB 4 4 2336100600002 REACTION (37-RB-97(0,B-)38-SR-97,,PN) 2336100600003 DECAY-DATA (37-RB-97,172.2MSEC) 172.2+-5.0 millisec, measured 2336100600004 REL-REF (A,23360009,I.Amarel+,J,JIN,31,577,1969) > 20 % 2336100600005 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100600006 ENDBIB 4 0 2336100600007 NOCOMMON 0 0 2336100600008 DATA 2 1 2336100600009 DATA DATA-ERR 2336100600010 NO-DIM NO-DIM 2336100600011 27.2E-2 1.5E-2 2336100600012 ENDDATA 3 0 2336100600013 ENDSUBENT 12 0 2336100699999 SUBENT 23361007 20171030 22682336100700001 BIB 4 6 2336100700002 REACTION (37-RB-98(0,B-)38-SR-98,,PN) 2336100700003 DECAY-DATA (37-RB-98,106.1MSEC) 106.1+-5.6 millisec, measured 2336100700004 ADD-RES No coincidences neutron-neutron-beta were detected. 2336100700005 So, upper limit of 10**-3 can be assigned for the 2336100700006 branching ratio for double-neutron emission. 2336100700007 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100700008 ENDBIB 6 0 2336100700009 NOCOMMON 0 0 2336100700010 DATA 2 1 2336100700011 DATA DATA-ERR 2336100700012 NO-DIM NO-DIM 2336100700013 13.3E-2 2.1E-2 2336100700014 ENDDATA 3 0 2336100700015 ENDSUBENT 14 0 2336100799999 SUBENT 23361008 20171030 22682336100800001 BIB 3 3 2336100800002 REACTION (55-CS-145(0,B-)56-BA-145,,PN) 2336100800003 DECAY-DATA (55-CS-145,611.MSEC) 611+-21 millisec, measured 2336100800004 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100800005 ENDBIB 3 0 2336100800006 NOCOMMON 0 0 2336100800007 DATA 2 1 2336100800008 DATA DATA-ERR 2336100800009 NO-DIM NO-DIM 2336100800010 12.1E-2 1.4E-2 2336100800011 ENDDATA 3 0 2336100800012 ENDSUBENT 11 0 2336100899999 SUBENT 23361009 20171030 22682336100900001 BIB 3 3 2336100900002 REACTION (55-CS-146(0,B-)56-BA-146,,PN) 2336100900003 DECAY-DATA (55-CS-146,352.MSEC) 352+-42 millisec, measured 2336100900004 STATUS (TABLE) 1 of J.Nucl.Phys. A, 222,621,1974 2336100900005 ENDBIB 3 0 2336100900006 NOCOMMON 0 0 2336100900007 DATA 2 1 2336100900008 DATA DATA-ERR 2336100900009 NO-DIM NO-DIM 2336100900010 14.2E-2 1.7E-2 2336100900011 ENDDATA 3 0 2336100900012 ENDSUBENT 11 0 2336100999999 ENDENTRY 9 0 2336199999999