ENTRY A0016 20080609 A063A001600000001 SUBENT A0016001 20080609 A063A001600100001 BIB 13 46 A001600100002 TITLE Acceleration of Ca-48 ions and new possibilities A001600100003 of synthesizing superheavy elements A001600100004 AUTHOR (G.N.Flerov,Ju.C.Oganesjan,A.A.Pleve,N.V.Pronin, A001600100005 Ju.P.Tret'jakov) A001600100006 INSTITUTE (4ZZZDUB) A001600100007 REFERENCE (R,JINR-D7-9555,1976) Russian text. A001600100008 (J,NP/A,267,359,1976) English text. A001600100009 (J,NP/A,239,157,1975) Experimental setup. A001600100010 FACILITY (CYCLO,4ZZZDUB) A001600100011 METHOD (SITA,EXTB,MOMIX,REC) A001600100012 The incident Ca-48 ion beam was grazed the lateral faceA001600100013 of a rotating hollow cylinder. This surface was A001600100014 covered by a thin (about 2-mg/cm**2) layer of the A001600100015 target material deposited by vacuum vaporization. In A001600100016 this geometry the target is considered to be A001600100017 infinitely thick for the ion beam and recoil nuclei A001600100018 and, at the same time, sufficiently thin for an A001600100019 efficient detection of the fragment of spontaneously A001600100020 fissioning reaction products. Thus the cylinder A001600100021 surface served both as a target and a recoil catcher. A001600100022 The cylinder rotation transported the nuclei to Mica A001600100023 fission track detectors placed along the cylinderA001600100024 surface, and set a time scale for measuring spontaneousA001600100025 fission half-lives. During the experiments, the ion A001600100026 beam intensity was controlled by a special deviceA001600100027 placed outside the target. The integral ion beam was A001600100028 determined using an activation analysis method, namelyA001600100029 from the build-up of a long-lived activity in an A001600100030 aluminium sample occupying a small fraction of the A001600100031 working surface of the rotating cylinder. A001600100032 DETECTOR (TRD). The detection efficiency was about 50%. A001600100033 ERR-ANALYS No analysis of the error is given by the authors. A001600100034 ADD-RES Schematic view of the source of multiply charged A001600100035 calcium ions is given in this paper. A001600100036 HISTORY (19780630C) A001600100037 (20080608A) BIB section updated A001600100038 Corrections were made according new exfor rules. A001600100039 STATUS (CURVE).By Cajad. A001600100040 (APRVD).By A.A.Pleve, numerical data only. A001600100041 MONITOR Long-lived activity was produced by Ca-48 in A001600100042 aluminium. A001600100043 REL-REF (N,,A.S.IL'INOV,R,JINR-P7-7108,1973) A001600100044 Communication of the joint institute for nuclear A001600100045 research. Method calculation. A001600100046 (R,,JU.C.OGANESJAN+,J,NP/A,239,353,1975) A001600100047 (R,,G.M.TER-AKOPJAN+,J,NP/A,255,509,1975) A001600100048 ENDBIB 46 0 A001600100049 NOCOMMON 0 0 A001600100050 ENDSUBENT 49 0 A001600199999 SUBENT A0016002 20080609 A063A001600200001 BIB 6 11 A001600200002 REACTION (82-PB-204(20-CA-48,G)102-NO-252,,SIG) A001600200003 SAMPLE Enriched target-Pb-204, enrichment 99.8%. A001600200004 RAD-DET (102-NO-252,SF) A001600200005 DECAY-DATA (102-NO-252,2.3SEC,SF,,0.3) A001600200006 COMMENT *By authors*.In this experiment, three spontaneous A001600200007 fission fragments were detected, and all of them can beA001600200008 assigned to the Pb-206(Ca-48,2n)NO-252 reaction on the A001600200009 Pb-206 admixture of the target material. A001600200010 MISC-COL (MISC).The numbers of tracks. They correspond to the A001600200011 total number of fission events recorded during A001600200012 bombardments of the order of one hour. A001600200013 ENDBIB 11 0 A001600200014 NOCOMMON 0 0 A001600200015 DATA 3 1 A001600200016 EN DATA-MAX MISC A001600200017 MEV MICRO-B NO-DIM A001600200018 235. 0.0005 3. A001600200019 ENDDATA 3 0 A001600200020 ENDSUBENT 19 0 A001600299999 SUBENT A0016003 20080609 A063A001600300001 BIB 6 9 A001600300002 REACTION (82-PB-206(20-CA-48,2N)102-NO-252,,SIG) A001600300003 SAMPLE Enriched target-Pb-206 A001600300004 RAD-DET (102-NO-252,SF) A001600300005 DECAY-DATA (102-NO-252,2.3SEC,SF,,0.3) A001600300006 ADD-RES (DECAY) A001600300007 MISC-COL (MISC1).The numbers of tracks. They correspond A001600300008 to the total number of fission events recorded A001600300009 during bombardments of the order of one hour. A001600300010 (MISC2).Calculated cross section. A001600300011 ENDBIB 9 0 A001600300012 NOCOMMON 0 0 A001600300013 DATA 4 1 A001600300014 EN DATA MISC1 MISC2 A001600300015 MEV MICRO-B NO-DIM MICRO-B A001600300016 235. 0.5 438. 0.26 A001600300017 ENDDATA 3 0 A001600300018 ENDSUBENT 17 0 A001600399999 SUBENT A0016004 20080609 A063A001600400001 BIB 5 8 A001600400002 REACTION (82-PB-207(20-CA-48,3N)102-NO-252,,SIG) A001600400003 SAMPLE Enriched target-Pb-207 A001600400004 RAD-DET (102-NO-252,SF) A001600400005 DECAY-DATA (102-NO-252,2.3SEC,SF,,0.3) A001600400006 MISC-COL (MISC1).The numbers of tracks. They correspond A001600400007 to the total number of fission events recorded A001600400008 during bombardments of the order of one hour. A001600400009 (MISC2).Calculated cross section A001600400010 ENDBIB 8 0 A001600400011 NOCOMMON 0 0 A001600400012 DATA 4 1 A001600400013 EN DATA MISC1 MISC2 A001600400014 MEV MICRO-B NO-DIM MICRO-B A001600400015 235. 0.125 59. 0.31 A001600400016 ENDDATA 3 0 A001600400017 ENDSUBENT 16 0 A001600499999 SUBENT A0016005 20080609 A063A001600500001 BIB 5 8 A001600500002 REACTION (82-PB-208(20-CA-48,4N)102-NO-252,,SIG) A001600500003 SAMPLE Enriched target-Pb-208 A001600500004 RAD-DET (102-NO-252,SF) A001600500005 DECAY-DATA (102-NO-252,2.3SEC,SF,,0.3) A001600500006 MISC-COL (MISC1).The numbers of tracks. They correspond A001600500007 to the total number of fission events recorded A001600500008 during bombardments of the order of one hour. A001600500009 (MISC2).Calculated cross section A001600500010 ENDBIB 8 0 A001600500011 NOCOMMON 0 0 A001600500012 DATA 4 1 A001600500013 EN DATA MISC1 MISC2 A001600500014 MEV MICRO-B NO-DIM MICRO-B A001600500015 235. 0.02 30. 0.031 A001600500016 ENDDATA 3 0 A001600500017 ENDSUBENT 16 0 A001600599999 ENDENTRY 5 0 A001699999999