ENTRY A0889 20240919 A119A088900000001 SUBENT A0889001 20240919 A119A088900100001 BIB 13 42 A088900100002 TITLE Measurements of cross sections and decay properties of A088900100003 the isotopes of elements 112, 114 and 116 produced in A088900100004 the fusion reactions U-233,238, Pu-242 and A088900100005 Cm-248+Ca-48. A088900100006 AUTHOR (Yu.Ts.Oganessian, V.K.Utyonkov, Yu.V.Lobanov, A088900100007 F.Sh.Abdullin, A.N.Polyakov, I.V.Shirokovsky, A088900100008 Yu.S.Tsyganov, G.G.Gulbekian, S.L.Bogomolov, B.N.Gikal,A088900100009 A.N.Mezentsev, S.Iliev, V.G.Subbotin, A.M.Sukhov, A088900100010 A.A.Voinov, G.V.Buklanov, K.Subotic, V.I.Zagrebaev, A088900100011 M.G.Itkis, J.B.Patin, K.J.Moody, J.F.Wild, M.A.Stoyer, A088900100012 N.J.Stoyer, D.A.Shaughnessy, J.M.Kenneally, P.A.Wilk, A088900100013 R.W.Lougheed, R.I.Il'kaev, S.P.Vesnovskii) A088900100014 REFERENCE (J,PR/C,70,064609,2004) A088900100015 REL-REF (I,,Yu.Ts.Oganessian,J,JP/G,34,R165,2007) A088900100016 Experimental conditions A088900100017 (O,A0890001,Yu.Ts.Oganessian+,J,PR/C,72,034611,2005) A088900100018 final data for 3n,4n data for U-238+48Ca and new data A088900100019 for Am-243 + Ca-48 A088900100020 INSTITUTE (1USALRL,4RUSEPA) A088900100021 FACILITY (CYCLO,4ZZZDUB) U-400 Cyclotron A088900100022 METHOD (TOF) A088900100023 PART-DET (A) Alpha-particles and residual nuclides. A088900100024 SAMPLE The 32-cm2 rotating targets, consisted of the enriched A088900100025 isotopes U-233 (99.97%), U-238(99.3%), Pu-242(99.98%) A088900100026 and Cm-248(97.4%) deposited as U(3)O(8), PuO(2) and A088900100027 CmO(2) onto 1.5 um Ti foils to thicknesses of about A088900100028 0.44, 0.35, 0.40 and 0.35 mg/cm**2, respectively. A088900100029 DETECTOR (MCPLT) A 4-cm x 12-cm semiconductor detector array A088900100030 with 12 vertical position-sensitive strips surrounded A088900100031 by eight 4-cm x 4-cm side detectors without position A088900100032 sensitivity, forming a box open to the front (beam) A088900100033 side. The position-averaged detection efficiency for A088900100034 full-energy alpha-particles emitted in the decays of A088900100035 implanted nuclei was 87%. A088900100036 ERR-ANALYS (DATA-ERR) No information about source of uncertainty A088900100037 MISC-COL (MISC) Excitation energy of the compound nucleus. A088900100038 HISTORY (20110809C) SB A088900100039 (20130129A) New isotope 114-FL was added in Sub.003 A088900100040 (20200214A) SD: New isotope 116-LV added to Subent 004.A088900100041 Small corrections in all Subents. A088900100042 (20240919A) SD: Subents were split according to A088900100043 EXFOR rules. A088900100044 ENDBIB 42 0 A088900100045 NOCOMMON 0 0 A088900100046 ENDSUBENT 45 0 A088900199999 SUBENT A0889002 20240919 A119A088900200001 BIB 5 21 A088900200002 REACTION (92-U-238(20-CA-48,3N)112-CN-283,,SIG) A088900200003 DECAY-DATA (112-CN-283,,A,9540.) A088900200004 Alpha decay (9.54+-0.06 MeV) A088900200005 Half-life is 3.8+-1.2,0.7 sec A088900200006 This is the average alpha energy from 19/19 events A088900200007 COMMENT *By authors*. In view of the present results, the A088900200008 non-observation of decay chains of element 112 isotopesA088900200009 in the reaction of 238U with 231-MeV 48Ca projectiles A088900200010 (excitation energy of compound nuclei=32.5 MeV) A088900200011 at LBNL (see W.Loveland+,J,PR/C,66,044617,2002) is A088900200012 obviously due to insufficient experimental sensitivity.A088900200013 The upper cross section limit for one event set in the A088900200014 recent LBNL experiment 1.6 pb corresponds to a A088900200015 statistically valid 84% upper limit of 2.9 pb A088900200016 (see K.-H.Schmidt+,J,ZP/A,316,19,1984) provided all A088900200017 the parameters of the experiment were chosen optimally.A088900200018 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl. IA088900200019 and values from the text on p.064609-7 A088900200020 HISTORY (20200214A) SD: STATUS updated. A088900200021 (20240919A) SD: Subent was split in two (see A088900200022 Subent 005). A088900200023 ENDBIB 21 0 A088900200024 NOCOMMON 0 0 A088900200025 DATA 6 1 A088900200026 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900200027 MEV PB PB PB MEV MEV A088900200028 234. 2.5 1.8 1.1 32.9 37.2A088900200029 ENDDATA 3 0 A088900200030 ENDSUBENT 29 0 A088900299999 SUBENT A0889003 20240919 A119A088900300001 BIB 4 10 A088900300002 REACTION (94-PU-242(20-CA-48,4N)114-FL-286,,SIG) A088900300003 DECAY-DATA (114-FL-286,,A,10190.) A088900300004 Alpha decay (10.19+-0.06 MeV) A088900300005 Half-life is 0.13+-0.04,0.02 sec A088900300006 This is the average alpha energy from 19/12 events A088900300007 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,72,034611,2005) Tbl.IIA088900300008 (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl.I A088900300009 and values from the text on p.064609-7 A088900300010 HISTORY (20200214A) SD: Subent was split in three (see A088900300011 Subents 006, 007). STATUS updated. A088900300012 ENDBIB 10 0 A088900300013 NOCOMMON 0 0 A088900300014 DATA 6 1 A088900300015 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900300016 MEV PB PB PB SEE TEXT SEE TEXT A088900300017 244. 4.5 3.6 1.9 38.0 42.4A088900300018 ENDDATA 3 0 A088900300019 ENDSUBENT 18 0 A088900399999 SUBENT A0889004 20240919 A119A088900400001 BIB 5 15 A088900400002 REACTION (96-CM-248(20-CA-48,4N)116-LV-292,,SIG) A088900400003 DECAY-DATA (116-LV-292,,A,10660.) A088900400004 Alpha decay (10.66+-0.07 MeV) A088900400005 Half-life is 18+-16,6 msec A088900400006 This is the average alpha energy from 4/5 events A088900400007 REL-REF (M,,Yu.Ts.Oganessian+,J,PAN,64,1349,2001) A088900400008 transl. of Yad.Fiz.,64,1427,2001 A088900400009 (M,,Yu.Ts.Oganessian+,J,PR/C,63,011301,2000) A088900400010 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,72,034611,2005) Tbl.IIA088900400011 (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl.I A088900400012 and values from the text on p.064609-12 A088900400013 HISTORY (20200214A) SD: SF4=116-* -> 116-LV in REACTION, A088900400014 DECAY-DATA codes. STATUS updated. A088900400015 (20200214A) SD: Subent was split in two (see A088900400016 Subent 008). STATUS updated. A088900400017 ENDBIB 15 0 A088900400018 NOCOMMON 0 0 A088900400019 DATA 6 1 A088900400020 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900400021 MEV PB PB PB MEV MEV A088900400022 247. 3.3 2.5 1.4 36.8 41.1A088900400023 ENDDATA 3 0 A088900400024 ENDSUBENT 23 0 A088900499999 SUBENT A0889005 20240919 A119A088900500001 BIB 4 15 A088900500002 REACTION (92-U-238(20-CA-48,4N)112-CN-282,,SIG) A088900500003 COMMENT *By authors*.In view of the present results, the non- A088900500004 observation of decay chains of element 112 isotopes in A088900500005 the reaction of 238U with 231-MeV 48Ca projectiles A088900500006 (excitation energy of compound nuclei=32.5 MeV) A088900500007 at LBNL (see W.Loveland+,J,PR/C,66,044617,2002) is A088900500008 obviously due to insufficient experimental sensitivity.A088900500009 The upper cross section limit for one event set in the A088900500010 recent LBNL experiment 1.6 pb corresponds to a A088900500011 statistically valid 84% upper limit of 2.9 pb A088900500012 (see K.-H.Schmidt+,J,ZP/A,316,19,1984) provided all A088900500013 the parameters of the experiment were chosen optimally.A088900500014 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl. IA088900500015 and values from the text on p.064609-7 A088900500016 HISTORY (20240919T) SD: Part of Subent 002. A088900500017 ENDBIB 15 0 A088900500018 NOCOMMON 0 0 A088900500019 DATA 6 1 A088900500020 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900500021 MEV PB PB PB MEV MEV A088900500022 240. 0.6 1.6 0.5 37.7 41.9A088900500023 ENDDATA 3 0 A088900500024 ENDSUBENT 23 0 A088900599999 SUBENT A0889006 20240919 A119A088900600001 BIB 4 9 A088900600002 REACTION (94-PU-242(20-CA-48,3N)114-FL-287,,SIG) A088900600003 DECAY-DATA (114-FL-287,,A,10020.) A088900600004 Alpha decay (10.02+-0.06 MeV) A088900600005 Half-life is 0.48+-0.16,0.09 sec A088900600006 This is the average alpha energy from 16/16 events A088900600007 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,72,034611,2005) Tbl.IIA088900600008 (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl.I A088900600009 and values from the text on p.064609-7 A088900600010 HISTORY (20240919T) SD: Part of Subent 003. A088900600011 ENDBIB 9 0 A088900600012 NOCOMMON 0 0 A088900600013 DATA 6 1 A088900600014 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900600015 MEV PB PB PB SEE TEXT SEE TEXT A088900600016 244. 3.6 3.4 1.7 38.0 42.4A088900600017 ENDDATA 3 0 A088900600018 ENDSUBENT 17 0 A088900699999 SUBENT A0889007 20240919 A119A088900700001 BIB 4 9 A088900700002 REACTION (94-PU-242(20-CA-48,2N)114-FL-288,,SIG) A088900700003 DECAY-DATA (114-FL-288,,A,9940.) A088900700004 Alpha decay (9.94+-0.06 MeV) A088900700005 Half-life is 0.80+-0.27,0.16 sec A088900700006 This is the average alpha energy from 16/16 events A088900700007 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,72,034611,2005) Tbl.IIA088900700008 (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl.I A088900700009 and values from the text on p.064609-7 A088900700010 HISTORY (20240919T) SD: Part of Subent 003. A088900700011 ENDBIB 9 0 A088900700012 NOCOMMON 0 0 A088900700013 DATA 6 1 A088900700014 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900700015 MEV PB PB PB SEE TEXT SEE TEXT A088900700016 235. 0.5 1.4 0.4 30.4 34.7A088900700017 ENDDATA 3 0 A088900700018 ENDSUBENT 17 0 A088900799999 SUBENT A0889008 20240919 A119A088900800001 BIB 5 12 A088900800002 REACTION (96-CM-248(20-CA-48,3N)116-LV-293,,SIG) A088900800003 DECAY-DATA (116-LV-293,,A,10540.) A088900800004 Alpha decay (10.54+-0.06 MeV) A088900800005 Half-life is 61+-57,20 msec A088900800006 This is the average alpha energy from 4/4 events A088900800007 REL-REF (M,,Yu.Ts.Oganessian+,J,PAN,64,1349,2001) A088900800008 transl. of Yad.Fiz.,64,1427,2001 A088900800009 (M,,Yu.Ts.Oganessian+,J,PR/C,63,011301,2000) A088900800010 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,72,034611,2005) Tbl.IIA088900800011 (TABLE,,Yu.Ts.Oganessian+,J,PR/C,70,064609,2004) Tbl.I A088900800012 and values from the text on p.064609-12 A088900800013 HISTORY (20240919T) SD: Part of Subent 004. A088900800014 ENDBIB 12 0 A088900800015 NOCOMMON 0 0 A088900800016 DATA 6 1 A088900800017 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX A088900800018 MEV PB PB PB MEV MEV A088900800019 247. 1.2 1.8 0.8 36.8 41.1A088900800020 ENDDATA 3 0 A088900800021 ENDSUBENT 20 0 A088900899999 ENDENTRY 8 0 A088999999999