Nuclear data sheets for A = 86

Tepel, J.W.

doi:10.1016/s0090-3752(88)80128-5

Cited by 18 publications

(3 citation statements)

References 125 publications

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“…2 in [21]). Furthermore, it cannot be associated with a closeenergy proton aligned 82 state in Sr, since no evidence has yet been found for such a level [27].…”

Section: Discussionmentioning

confidence: 99%

Level structure ofMo89

et al. 1993

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The level structure of Mo has been studied with the Ni( S,2pn) reaction at 110 MeV beam energy. Mainly two bands of p rays depopulating states of probable spin-parity values ranging up to (27/2) were determined from the excitation function, neutron and p-p coincidences, and p-ray angular distributions. The high-spin states of Mo show a scheme very similar to that of the Zr isotone. The interpretation of these states in terms of the three neutron-hole configuration (vgs~z) and core-excited states is discussed.PACS number(s): 27.50.+e

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“…2 in [21]). Furthermore, it cannot be associated with a closeenergy proton aligned 82 state in Sr, since no evidence has yet been found for such a level [27].…”

Section: Discussionmentioning

confidence: 99%

Level structure ofMo89

et al. 1993

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“…Therefore an in-beam study of S6Kr has been initiated. Excited states in S6Kr have previously been studied in the radioactive decay of S6Br , in Coulomb excitation and in particle transfer reaction experiments (see the recent compilation of Miiller and Tepel [3]). In the course of the present in-beam investigation the 4 + yrast state in S6Kr at 2250 keV was found to be an isomer [4] with a half-life of T1/2= 3.1(6) ns.…”

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confidence: 99%

“…This group of levels may arise from the two-proton configurations 7r(gs/2 f5)12) and 7r(gs/~ -1 P31~) that are expected at rather high energy since the excitation of a proton from the P3/2 to the g9/2 orbital needs approximately 1.6 MeV in the proton system of STRb. A (5-) assignment to a level at 3935 keV was also derived [3] from (p,p') and (t,a) reaction data. Spin and parity (6 + ) are assigned to the level at 4064.2 keV that might be described as a seniority 4 proton state of the configuration -3 -1 2 7r(f~/2 Pz/2 (Plp.)o).…”

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confidence: 99%

High-spin states in the N=50 nucleus86Kr

Winter

Funke

Schwengner

et al. 1992

Z. Physik A - Hadrons and Nuclei

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High-spin states in the N=50 nucleus S6Kr have been investigated via the S2Se(TLi,p2n) reaction using 32 MeV 7Li ions. In order to suppress 7-rays arising from pure neutron evaporation the measurements of angular distributions and relative excitation functions of the 7-rays as well as 7 -7 coincidences have been performed in particle-7 coincidence modes. Levels with excitation energy up to 7.9 MeV and tentative spins up to (12) have been established. On the basis of systematics tentative assignments of shell model configurations are proposed.PACS numbers: 23.20.-g, 27.50.+e High-spin states in doubly-even Kr nuclei reflect an almost complete variety of different modes of nuclear excitations. For light isotopes being close to the N=Z line properties of strong quadrupole deformation and, at large angular momentum, of broken g9/2 proton and/or g9/~ neutron pairs have been identified (for recent experimental data see ref. 1). With increasing neutron number the B(E2) values between levels of the yrast sequence decrease and few-particle excitations contribute more and more to the yrast states even at low spin. In 84Kr that is only 2 neutrons apart from the magic number 50 two-and fourquasiparticle states play a dominant role in the yrast sequence [2]. Due to the absence of experimental data on high-spin states in S6Kr it was not possible to trace which excitation modes appear or disappear when going to the nucleus with a closed neutron shell. Therefore an in-beam study of S6Kr has been initiated. Excited states in S6Kr have previously been studied in the radioactive decay of S6Br , in Coulomb excitation and in particle transfer reaction experiments (see the recent compilation of Miiller and Tepel [3]). In the course of the present in-beam investigation the 4 + yrast state in S6Kr at 2250 keV was found to be an isomer [4] with a half-life of T1/2= 3.1(6) ns. Excited states in S6Kr have been identified using in-beam 7-ray spectroscopy in connection with the S~Se(TLi,p2n) reaction at the cyclotron in Rossendorf and the tandem accelerator in Cologne. Angular distributions of the 3'-ray Supported by Deutsche Forschungsgemeinschaft intensities and 7-7 coincidences have been measured during the bombardment of 8=Se foils with 32 MeV 7Li ions. In these experiments the cross section for producing Kr isotopes is only few percent of the total cross section since the probability for emission of protons is rather small. In order to enhance 7-rays arising from Kr isotopes the particle-7 coincidence technique has been applied. Charged particles emitted during the irradiations have been detected by Si detectors of 100 #m effective thick-

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