ENTRY F1484 20231109 F148400000001 SUBENT F1484001 20231109 20240316 F148400100001 BIB 14 49 F148400100002 TITLE First experiment at the Super Heavy Element Factory: F148400100003 High cross section of 288Mc in the 243Am+48Ca F148400100004 reaction and identification of the new isotope 264Lr F148400100005 AUTHOR (Yu.Ts.Oganessian,V.K.Utyonkov,N.D.Kovrizhnykh, F148400100006 F.Sh.Abdullin,S.N.Dmitriev,D.Ibadullayev,M.G.Itkis, F148400100007 D.A.Kuznetsov,O.V.Petrushkin,A.V.Podshibiakin, F148400100008 A.N.Polyakov,A.G.Popeko,R.N.Sagaidak,L.Schlattauer, F148400100009 I.V.Shirokovski,V.D.Shubin,M.V.Shumeiko,D.I.Solovyev, F148400100010 Yu.S.Tsyganov,A.A.Voinov,V.G.Subbotin,A.Yu.Bodrov, F148400100011 A.V.Sabel'nikov,A.V.Khalkin,V.B.Zlokazov, F148400100012 K.P.Rykaczewski,T.T.King,J.B.Roberto,N.T.Brewer, F148400100013 R.K.Grzywacz,Z.G.Gan,Z.Y.Zhang,M.H.Huang,H.B.Yang) F148400100014 REFERENCE (J,PR/C,106,L031301,2022) F148400100015 #doi:10.1103/PhysRevC.106.L031301 F148400100016 INSTITUTE (4ZZZDUB,4KASATN,1USAORL,1USATEN,3CPRIMP) F148400100017 (3CZRCZR) Palacky University Olomouc, Czech Republic F148400100018 FACILITY (CYCLO,4ZZZDUB) DC-280 cyclotron of the Superheavy F148400100019 Element Factory F148400100020 METHOD (TOF,ASPEC) F148400100021 SAMPLE (95-AM-243,ENR=0.995) The targets consisting of the F148400100022 enriched isotope 243Am were produced by F148400100023 layer-by-layer electrodeposition. Six target sectors F148400100024 were mounted on a disk with a diameter of 15 cm and F148400100025 rotated at 1500 rpm. F148400100026 INC-SOURCE The beam intensity was gradually increased to F148400100027 1.2-1.3 p mu-A. F148400100028 DETECTOR (MAGSP) The reaction products were analyzed by means F148400100029 of Dubna Gas Filled Recoil Separator (DGFRS-2) . F148400100030 (SISD) The focal detector of 48 mm in vertical and F148400100031 220 mm in horizontal directions consisted of two F148400100032 double-sided strip detectors (DSSD) covering 48x128 mm2F148400100033 with 1 mm wide strips in such a way that the front F148400100034 detector shielded part of the rear detector. Each two F148400100035 of the 48 front horizontal strips of both detectors F148400100036 were connected. The back strips were paired together F148400100037 to form 110 strips of 2 mm width. The focal detector F148400100038 was surrounded by eight 60x120 mm2 side detectors, eachF148400100039 with 8 strips, forming a box with a depth of 120 mm. F148400100040 (MWPC) Two multiwire proportional chambers were used F148400100041 to register the nuclei passing through the separator. F148400100042 ERR-ANALYS The beam energy was measured with a systematic F148400100043 uncertainty of 1 MeV. F148400100044 (DATA-ERR) Total uncertainty is given. F148400100045 ADD-RES (DECAY) Fifty-five new decay chains of 288Mc and six F148400100046 chains assigned to 289Mc were detected. A new F148400100047 spontaneously fissioning isotope 264Lr was identified. F148400100048 MISC-COL (MISC) Excitation energy of the compound nucleus. F148400100049 STATUS (APRVD) Entry was approved by Dr. V.K.Utyonkov F148400100050 HISTORY (20231109C) F148400100051 ENDBIB 49 0 F148400100052 NOCOMMON 0 0 F148400100053 ENDSUBENT 52 0 F148400199999 SUBENT F1484002 20231109 20240316 F148400200001 BIB 4 9 F148400200002 REACTION (95-AM-243(20-CA-48,3N)115-MC-288,,SIG) F148400200003 DECAY-DATA (115-MC-288,0.195SEC,A) F148400200004 Half-life error: (+19/-15) msec. Half-life value was F148400200005 taken from Supplemental Material at F148400200006 https://link.aps.org/supplemental/10.1103/ F148400200007 PhysRevC.106.L031301 F148400200008 FLAG (1.) Target thickness was 0.36 mg/cm2 F148400200009 (2.) Target thickness was 0.38 mg/cm2 F148400200010 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,106,L031301,2022)Tbl.1F148400200011 ENDBIB 9 0 F148400200012 NOCOMMON 0 0 F148400200013 DATA 7 3 F148400200014 EN DATA +DATA-ERR -DATA-ERR MISC-MIN MISC-MAX F148400200015 FLAG F148400200016 MEV PB PB PB SEE TEXT SEE TEXT F148400200017 NO-DIM F148400200018 243.9 9.8 2.6 2.1 35.5 37.8F148400200019 1. F148400200020 240.9 17.1 6.3 4.7 33.1 35.2F148400200021 2. F148400200022 239.1 9.9 5.1 3.4 31.5 33.6F148400200023 2. F148400200024 ENDDATA 10 0 F148400200025 ENDSUBENT 24 0 F148400299999 SUBENT F1484003 20231109 20240316 F148400300001 BIB 4 9 F148400300002 REACTION (95-AM-243(20-CA-48,2N)115-MC-289,,SIG) F148400300003 DECAY-DATA (115-MC-289,0.260SEC,A) F148400300004 Half-life error: (+55/-39) msec. Half-life value was F148400300005 taken from Supplemental Material at F148400300006 https://link.aps.org/supplemental/10.1103/ F148400300007 PhysRevC.106.L031301 F148400300008 FLAG (1.) Target thickness was 0.36 mg/cm2 F148400300009 (2.) Target thickness was 0.38 mg/cm2 F148400300010 STATUS (TABLE,,Yu.Ts.Oganessian+,J,PR/C,106,L031301,2022)Tbl.1F148400300011 ENDBIB 9 0 F148400300012 NOCOMMON 0 0 F148400300013 DATA 8 3 F148400300014 EN DATA DATA-MAX +DATA-ERR -DATA-ERR MISC-MIN F148400300015 MISC-MAX FLAG F148400300016 MEV PB PB PB PB SEE TEXT F148400300017 SEE TEXT NO-DIM F148400300018 243.9 1.6 1.2 0.7 35.5F148400300019 37.8 1. F148400300020 240.9 1.1 2.5 0.9 33.1F148400300021 35.2 2. F148400300022 239.1 2.1 31.5F148400300023 33.6 2. F148400300024 ENDDATA 10 0 F148400300025 ENDSUBENT 24 0 F148400399999 ENDENTRY 3 0 F148499999999