[en] Suggestions have been made to the National Steering Committee for the Advanced Neutron Source (ANS) by Mills that provisions be made to install a high intensity slow positron facility, based on a ⁷⁸Kr loop, that would be available to the general community of scientists interested in this field. The flux of thermal neutrons calculated for the ANS is E + 15 sec^-1 m^-2, which Mills has estimated will produce 5 mm beam of slow positrons having a current of about 1 E + 12 sec ^-1. The intensity of such a beam will be a least 3 orders of magnitude greater than those presently available. The construction of the ANS is not anticipated to be complete until the year 2000. In order to properly plan the design of the ANS, strong considerations are being given to a proof-of-principle experiment, using the presently available High Flux Isotopes Reactor, to test the ⁷⁸Kr loop technique. The positron current from the HFIR facility is expected to be about 1 E + 10 sec^-1, which is 2 orders of magnitude greater than any other available. If the experiment succeeds, a very valuable facility will be established, and important formation will be generated on how the ANS should be designed. 3 refs., 1 fig

No abstract available

[en] An investigation of the beta decay of ⁷⁸Rb to levels in ⁷⁸Kr has been carried out, and a detailed level scheme is proposed. The half-lives of sup(78g)Rb and sup(78m)Rb have been measured to be 17.66 +- 0.08 m and 5.74 +- 0.05 m, respectively. It has been possible to deduce percentage feedings and log ft values separately for the ground state and isomeric decays. The spectroscopic studies favour a Jsup(π) = 0⁺ assignment for the ⁷⁸Rb ground state, and 4^- for the isomeric level. This implies that the sup(78g)Rb → ⁷⁸Kr decay is isospin forbidden. (orig.)

[en] The features of data accumulated for 1817 h in an experimental search for the 2K(2ν)-capture mode of ⁷⁸Kr decay are discussed. A new limit on the half-life for this decay is found: T_1sol2 ≥ 2.3 x 10²⁰ yr (at a 90% C.L.)

No abstract available

[en] The Berkeley Gas-filled Separator provides new research opportunities at Lawrence Berkeley National Laboratory's X-Inch Cyclotron. The use of this apparatus for the study of proton drip-line nuclides is discussed. Preliminary results of ⁷⁸Kr bombardments of ¹⁰²Pd targets at mid-target energies of 360, 375 and 385 MeV are presented. Improvements planned partially as a result of this measurement are also discussed

[en] Features of data accumulated for 1817 h in the experimental search for 2K(2ν)-capture decay mode of ⁷⁸Kr are discussed. The new limit for this decay half-life is found to be T_1/2 ≥ 2.3 x 10²⁰ yr (90% C.L.). The method used in allows one to reach a level of sensitivity for the half-life up to 10²² yr and to test some of theoretical models. Results of the next step of measurement are presented

[en] Separation of ⁷⁸Kr and ⁸⁶Kr isotopes in a hot wire thermal diffusion (TD) column is presented. The transport coefficients were determined from both static and flow separation data. Finally, some performances of this column are compared with those of other columns cited in the literature. (author)

No abstract available

[en] Short communication. 3 refs