Nuclear spins and magnetic moments of some neutron-deficient rubidium isotopes

Ekström, C.; Ingelman, S.; Wannberg, G.; Skarestad, M.

doi:10.1016/0375-9474(78)90515-8

Cited by 62 publications

(21 citation statements)

References 21 publications

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“…the observed feedings to the 2 + states, the strong feeding to the 2,764 keV (4-) level, and the observed feeding to the 1,977 keV (6 +) state) suggest a 4 assignment. These parity arrangements correspond to those proposed by Ekstrom [18]. …”

Section: Discussionsupporting

confidence: 54%

“…A recent 7SRb spin measurement by Ekstrom etal. [18] of 0 for the ground state -with expected positive parity -is not consistent with these large feedings. A 0 § ~2[ /~+ decay to the 78Kr first excited state would be second forbidden, with a logfi of at least 11 [19] and therefore a /~+ feeding less than 5 x I0 3 %.…”

Section: Introductionmentioning

confidence: 56%

“…In Rehfield's analysis, there is no indication of/?-feeding to states between ~8~Kr and the 3,437 keV level. Although Ekstrom et al [18] have measured a spin of 0 for 7S~Rb and 4 for 78~Rb, the parities of both states are still uncertain; here the lack of/3-feeding to ~SKr states lower than 3,437keV (in particular the 455 keV 2~-level) would favour a 0 + assignment for ~'SgRb. (A 0-assignment would permit a 78~Rb~VSKr(2+) first forbidden unique transition with a possible logft of ~8.5 [19]).…”

Section: Resultsmentioning

confidence: 93%

See 2 more Smart Citations

The decay of78g Rb and78m Rb to levels in78Kr

et al. 1981

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An investigation of the beta decay of 78Rb to levels in VSKr has been carried out, and a detailed level scheme is proposed. The half-lives of 7SgRb and vS"Rb have been measured to be 17.66+0.08m and 5.74_+0.05m, respectively. It has been possible to deduce percentage feedings and logft values separately for the ground state and isomeric decays. The spectroscopic studies favour a J~=0 + assignment for the 7SRb ground state, and 4-for the isomeric level. This implies that the 7SgRb--* VS~Kr decay is isospin forbidden.

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Section: Discussionsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 93%

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The decay of78g Rb and78m Rb to levels in78Kr

et al. 1981

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“…= 1.8 nm) [18]. On the other hand, the Nilsson model has been used successfully for an interpretation of the nuclear spins and moments of some light doubly-odd Rb and Br isotopes [29,30], for examples the magnetic moment of the 1 ground state of the N=41 nucleus V6Br can be well interpreted. However, an attempt to describe the magnetic moment of the 1 § ground state of a~ on the basis of pure Nilsson-configurations [17] is not satisfactory.…”

Section: Discussionmentioning

confidence: 97%

In-beam study of excited states in80Br

et al. 1984

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Excited states of the doubly-odd nucleus 8~ have been studied via the reactions 8~ n), S~ 2n) and 78Se(~,pn) using in-beam y-ray spectroscopy. A positiveparity level sequence built on a P= 5 + state at 331.04 keV has been found up to spin (10). For this 5 + level de-exciting to the known 5-isomeric state and for the 6 + level at 357.22 keV half-lives of 0.7 and 0.4 ns, respectively, have been determined. Negativeparity states have been observed up to spin (6). For the positive-parity level sequence the configuration (ng9/z, vg9/2) and collective excitations are proposed. Some of the negative-parity states are tentatively interpreted as arising from the configurations (~P3/2, vg9/2) and (np3/2 , (vg9/2)37/2). Nuclear Reactions." 78Se(cc, pn), E=23, 27MeV; measured ET, a(E,E~,O),77-coin., 0r 8~ 2n), E=13.5 MeV; measured E~, a(E~, 0), yT-coin.; 8~ n), E=6.7 MeV; measured E~, a(Ey); 8~ deduced levels, J, n, T1/2. Enriched targets. Ge (Li) detectors.

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“…In 76Rb the ground state has spin 1 determined in atomic beam experiments [35,36,45]. Data of beta decay to 76Kr suggest a negative parity [37,38].…”

Section: Discussionmentioning

confidence: 95%

Identification of a 3.2?s isomer in76Rb

Hofmann

Zychor

Heßberger

et al. 1986

Z. Physik A - Atomic Nuclei

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Fusion evaporation reactions were investigated to search for short lived isomeric states of nuclei near the proton drip line. Gamma spectra were measured, both singles and in delayed coincidence with evaporation residues implanted into a silicon detector after a velocity separation. A short lived activity was measured in the 4~176 ~ 8~ reaction at excitation energies between 55 and 79 MeV. A half-life of 3.20(10) gs was determined from delayed coincidences between evaporation residues and gamma rays. At E*= 55 MeV the cross section is 9 mb. The activity was assigned to an isomeric state in 76Rb by investigation of excitation functions. The isomer decays by emission of four gamma rays with energies of 70.55(5), 101.30(4), 145.11 (5), and 246.32(10) keV. A first level scheme is proposed assigning to the isomeric state an energy of 316.94(7) keV above the ground state. The isomer decaying into the low spin 1 (-) ground state band is explained from systematics as a band head of a high spin (4 +) (7"cg9/2, vg9/2) structure.A high hindrance factor of 3 x 106 for E1 radiation compared to a single particle transition is due possibly to a change of the core particle structure in the transition.

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Nuclear spins and magnetic moments of some neutron-deficient rubidium isotopes

Cited by 62 publications

References 21 publications

The decay of78g Rb and78m Rb to levels in78Kr

The decay of78g Rb and78m Rb to levels in78Kr

In-beam study of excited states in80Br

Identification of a 3.2?s isomer in76Rb

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