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The new element 111

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Abstract

The new element 111 was produced and unambiguously identified in an experiment at SHIP, GSI Darmstadt. Three nuclei of the isotope {sup 272}111 were observed in irradiations of {sup 209}Bi targets with {sup 64}Ni projectiles of 318 MeV and 320 MeV energy. The cross-sections are (1.7{sup +3.3}{sub -1.4}) pb and (3.5{sup +4.6}{sub -2.3}) pb, respectively. The nuclei decay by {alpha} emission into the new and so far the heaviest isotopes of the elements 109 and 107 with mass numbers A=268 and A=264. The {alpha}-decay chains were followed down to the known nuclei {sup 260}105 and {sup 256}Lr. (orig.)
Authors:
Hofmann, S; [1]  Ninov, V; [1]  Hessberger, F P; [1]  Armbruster, P; [1]  Folger, H; [1]  Muenzenberg, G; [1]  Schoett, H J; [1]  Popeko, A G; [2]  Yeremin, A V; [2]  Andreyev, A N; [2]  Saro, S; [3]  Janik, R; [3]  Leino, M [4] 
  1. Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)
  2. Joint Inst. for Nuclear Research, Dubna (USSR). Lab. of Nuclear Reactions
  3. Komenskeho Univ., Bratislava (Slovakia). Dept. of Nuclear Physics
  4. Jyvaeskylae Univ. (Finland). Dept. of Physics
Publication Date:
Jan 01, 1995
Product Type:
Technical Report
Report Number:
GSI-95-05(prepr.)
Reference Number:
SCA: 663210; 663450; 663590; 663580; PA: DEN-95:0F5481; EDB-95:054346; SN: 95001361284
Resource Relation:
Other Information: PBD: Jan 1995
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BISMUTH 209 TARGET; NICKEL 64 REACTIONS; HEAVY NUCLEI; ALPHA DECAY; HEAVY ION FUSION REACTIONS; EXPERIMENTAL DATA; MEV RANGE 100-1000; ELEMENT 111 272; INTEGRAL CROSS SECTIONS; ELEMENT 109 268; ELEMENT 107 264; ALPHA SPECTRA; HALF-LIFE; ENERGY SPECTRA; ALPHA PARTICLES; NEUTRONS; 663210; 663450; 663590; 663580; GROUND-STATE RADIOACTIVITY; HEAVY-ION-INDUCED REACTIONS AND SCATTERING; A = 220 AND ABOVE; A = 190-219
OSTI ID:
10128321
Research Organizations:
Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany)
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ON: DE95755953; TRN: DE95F5481
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
DEN
Size:
3 p.
Announcement Date:
Jul 04, 2005

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Citation Formats

Hofmann, S, Ninov, V, Hessberger, F P, Armbruster, P, Folger, H, Muenzenberg, G, Schoett, H J, Popeko, A G, Yeremin, A V, Andreyev, A N, Saro, S, Janik, R, and Leino, M. The new element 111. Germany: N. p., 1995. Web.
Hofmann, S, Ninov, V, Hessberger, F P, Armbruster, P, Folger, H, Muenzenberg, G, Schoett, H J, Popeko, A G, Yeremin, A V, Andreyev, A N, Saro, S, Janik, R, & Leino, M. The new element 111. Germany.
Hofmann, S, Ninov, V, Hessberger, F P, Armbruster, P, Folger, H, Muenzenberg, G, Schoett, H J, Popeko, A G, Yeremin, A V, Andreyev, A N, Saro, S, Janik, R, and Leino, M. 1995. "The new element 111." Germany.
@misc{etde_10128321,
title = {The new element 111}
 author = {Hofmann, S, Ninov, V, Hessberger, F P, Armbruster, P, Folger, H, Muenzenberg, G, Schoett, H J, Popeko, A G, Yeremin, A V, Andreyev, A N, Saro, S, Janik, R, and Leino, M}
 abstractNote = {The new element 111 was produced and unambiguously identified in an experiment at SHIP, GSI Darmstadt. Three nuclei of the isotope {sup 272}111 were observed in irradiations of {sup 209}Bi targets with {sup 64}Ni projectiles of 318 MeV and 320 MeV energy. The cross-sections are (1.7{sup +3.3}{sub -1.4}) pb and (3.5{sup +4.6}{sub -2.3}) pb, respectively. The nuclei decay by {alpha} emission into the new and so far the heaviest isotopes of the elements 109 and 107 with mass numbers A=268 and A=264. The {alpha}-decay chains were followed down to the known nuclei {sup 260}105 and {sup 256}Lr. (orig.)}
 place = {Germany}
 year = {1995}
 month = {Jan}
 }