First Observation of the Nuclei 87Tc and 88Tc

Research output: Contribution to journalLetter


title = "First Observation of the Nuclei 87Tc and 88Tc",
abstract = "The gamma-decay of excited states in the neutron deficient isotopes Tc-87 and Tc-88 has been observed for the first time. The fusion-evaporation reactions Ni-58(S-32, p2n)Tc-87 and Ni-58(S-32, pn)Tc-88 at 110 MeV, Ca-40(Cr-50, p2n)Tc-87 and Ca-40(Cr-50, pn)Tc-88 at 170 MeV and Ni-58(Ar-36, alpha-pn)Tc-88 at 145 MeV beam energy were used. Unambiguous identification of these nuclei which are populated with less than 1 mb cross section was achieved with coincidences between the gamma-radiation and the evaporation residues detected in a recoil mass separator. From gamma-gamma-coincidence data, a decay scheme of 11 transitions was constructed for Tc-88, the ground state of which is suggested to have I-pi = 7- or 8+. Two transitions identified in Tc-87 follow the pattern of a g9/2 one-quasiparticle band.",
author = "Dirk Rudolph and E. Cristancho and Gross, {C. J.} and A. Jungclaus and Lieb, {K. P.} and Bentley, {M. A.} and W. Gelletly and J. Simpson and H. Grawe and J. Heese and Maier, {K. H.} and J. Eberth and S. Skoda and Durell, {J. L.} and Varley, {B. J.} and Blumenthal, {D. J.} and Lister, {C. J.} and S. Rastikerdar",
note = "7",
year = "1991",
doi = "10.1088/0954-3899/17/7/003",
language = "English",
volume = "17",
pages = "L113--L119",
journal = "Journal of Physics G: Nuclear Physics",
issn = "0954-3899",
publisher = "IOP Publishing",
number = "7",