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First Observation of the Nuclei 87Tc and 88Tc

Rudolph, Dirk LU ; Cristancho, E.; Gross, C. J.; Jungclaus, A.; Lieb, K. P.; Bentley, M. A.; Gelletly, W.; Simpson, J.; Grawe, H. and Heese, J., et al. (1991) In Journal of Physics G: Nuclear and Particle Physics 17(7). p.113-119
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... (More)
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. (Less)
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Journal of Physics G: Nuclear and Particle Physics
volume
17
issue
7
pages
113 - 119
publisher
IOP Publishing
external identifiers
  • scopus:4243770666
ISSN
0954-3899
DOI
10.1088/0954-3899/17/7/003
language
English
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no
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b4c9d786-ca04-4b9b-adc1-0a4f1f17cbb6 (old id 3964434)
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http://iopscience.iop.org/0954-3899/17/7/003
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2013-08-13 18:48:25
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2017-05-07 04:13:02
@article{b4c9d786-ca04-4b9b-adc1-0a4f1f17cbb6,
  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       = {Rudolph, Dirk and Cristancho, E. and Gross, C. J. and Jungclaus, A. and Lieb, K. P. and Bentley, M. A. and Gelletly, W. and Simpson, J. and Grawe, H. and Heese, J. and Maier, K. H. and Eberth, J. and Skoda, S. and Durell, J. L. and Varley, B. J. and Blumenthal, D. J. and Lister, C. J. and Rastikerdar, S.},
  issn         = {0954-3899},
  language     = {eng},
  number       = {7},
  pages        = {113--119},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics G: Nuclear and Particle Physics},
  title        = {First Observation of the Nuclei 87Tc and 88Tc},
  url          = {http://dx.doi.org/10.1088/0954-3899/17/7/003},
  volume       = {17},
  year         = {1991},
}