Isomerism in 69Se

Preiss, I. L.; LaBrecque, J. J.; Bakhru, H.; Morse, R.I.

doi:10.1016/0375-9474(73)90711-2

Cited by 9 publications

(3 citation statements)

References 3 publications

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“…"The half-life of the new isotope 69 Se has been found to be 27±3 sec." This half-life agrees with the currently adopted value of 27.4(2) s. A previous measurement of 1.8 and 14 min.isomeric states[60] was evidently incorrect.…”

supporting

confidence: 75%

“…58 Zn58 Zn was first observed in 1986 by Seth et al in "Mass of Proton-Rich58 Zn by Pion Double Charge Exchange"[20].A π + beam with a central energy of 292 MeV hit a58 Ni target to measure the (π + ,π − ) reaction at the Los Alamos Meson Physics Facility 58. Zn was identified by the detection of negative pions π − measured using a modified version of According to these experiments we conclude to the formation of the Zn isotopes60 Zn and61 Zn by the reactions58 Ni(α,n)61 Zn,58 Ni(α,2n)60 Zn and perhaps some60 Ni(α,3n)61 Zn, the latter two reactions being absent with…”

mentioning

confidence: 70%

“…In the 2005 paper "First observation of 60 Ge and 64 Se" Stolz et al identified the isotope 64 Se for the first time [51]. 64 Se was produced in the projectile fragmentation reaction of a 140 MeV/nucleon 78 Kr beam on a beryllium target at the Coupled Cyclotron Facility of the National Superconducting Cyclotron Laboratory at Michigan State University.…”

Section: Sementioning

confidence: 99%

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Discovery of zinc, selenium, bromine, and neodymium isotopes

Gross

Claes

Kathawa

et al. 2012

Atomic Data and Nuclear Data Tables

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Currently, thirty-two zinc, thirty-two selenium, twenty-nine bromine and thirty-one neodymium isotopes have been observed and the discovery of these isotopes is discussed here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.[119]. A 40 Ca beam from the Berkeley SuperHILAC bombarded a gas-cooled 92 Mo target. 127 Nd was produced in the fusion-evaporation reaction 92 Mo( 40 Ca,αn) and identified with the on-line isotope separator OASIS. "From the growth and decay data, a half-life of 1.9 ± 0.4 s was deduced, which is in good agreement with the calculated value of 1.8 s for 127 Nd." This half-life is included in the currently accepted average value of 1.8(4) s. 128 NdIn 1985 128 Nd was identified by Lister et al. in "Deformation of Very Light Rare-Earth Nuclei" [120]. A 40 Ca beam from the Daresbury Laboratory Van de Graaff accelerator was incident on a 92 Mo target and 128 Nd was produced in the fusion-evaporation reaction 92 Mo( 40 Ca,2p2n). Gamma rays, neutrons and charged particles were detected and new ground-state bands observed. "This letter reports results on the ground-state bands in the even-even nuclei 128 ." An earlier identification and half-life measurement of 4(2) s [119] was later refuted [121]. 5.4. 129−133 Nd The first identification of 129 Nd, 130 Nd, 131 Nd, 132 Nd, and 133 Nd, was reported in 1977 by Bogdanov et al. in "New Neutron-Deficient Isotopes of Barium and Rare-Earth Elements" [122]. The Dubna U-300 Heavy Ion Cyclotron accelerated a 32 S beam which bombarded enriched targets of 102 Pd and 106 Cd. The isotopes were identified with the BEMS-2 isotope separator. "In the present paper, isotopes were mainly identified by measuring the γ-ray and X-ray spectra of the daughter nuclei formed as a result of measuring the β + decay. In addition, the decay curves of the total β-activity of given isobars have been measured." The reported half-life of 5.9(6) s for 129 Nd is close to the accepted value of 4.9(2) s. The half-life of 28(3) s for 130 Nd is within a factor of two of the currently accepted value of 13(3) s. The half-lives of 24(3) s ( 131 Nd) and 105(10) s ( 132 Nd) are included in the currently accepted average values of 25.4(9) s and 94(8) s. The half-life of 70(10) s for 133 Nd corresponds to the presently adopted half-life. 5.5. 134,135 Nd 134 Nd and 135 Nd were discovered by Abdurazakov et al. in the 1970 paper "New Isotopes 133 Pr, 134 Nd, and 135 Nd; Decay Schemes of 134 Pr and 135 Pr" [123]. Spallation reactions were induced by 660 MeV protons irradiating a gadolinium target at the Joint Institute for Nuclear Reactions in Dubna, Russia. The reaction products were then chemically separated and identified by the measured γ-ray spectra. " 134 Nd was identified and its half-life determined via the strongest γ rays of 134 Pr (T = 17±2 min) with energies 409.2 and 639.0 keV.[The figure] shows the build-up and decline of the intensity of the 409.2 keV γ lray of 134 Pr. The half-life of was found from the...

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supporting

confidence: 75%