Strengths of gamma-ray transitions in A = 6–44 nuclei (III)

Endt, P.M.

doi:10.1016/0092-640x(79)90020-2

Cited by 248 publications

(86 citation statements)

References 53 publications

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“…The observed branching ratios towards the 3/2 − and 5/2 − states were used to make estimates of the B(E1)-transition rates to these negative parity states, assuming a single-particle d 5/2 -g 9/2 E2 transition. The obtained B(E1) estimates are of the order of 10 −4 -10 −6 , which are typical values for this mass region [74].…”

Section: -10supporting

confidence: 51%

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
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The quasi-SU(3) sequence of the positive parity νg 9/2 ,d 5/2 ,s 1/2 orbitals above the N = 40 shell gap are assumed to induce strong quadrupole collectivity in the neutron-rich Fe (Z = 26) and Cr (Z = 24) isotopes below the nickel region. In this paper the position and strength of these single-particle orbitals are characterized in the neighborhood of 68 Ni (Z = 28, N = 40) through the 66 Ni(d,p) 67 Ni one-neutron transfer reaction at 2.95 MeV/nucleon in inverse kinematics, performed at the REX-ISOLDE facility in CERN. A combination of the Miniball γ -array and T-REX particle-detection setup was used and a delayed coincidence technique was employed to investigate the 13.3-μs isomer at 1007 keV in 67 Ni. Excited states up to an excitation energy of 5.8 MeV have been populated. Feeding of the νg 9/2 (1007 keV) and νd 5/2 (2207 keV and 3277 keV) positive-parity neutron states and negative parity (νpf ) states have been observed at low excitation energy. The extracted relative spectroscopic factors, based on a distorted-wave Born approximation analysis, show that the νd 5/2 single-particle strength is mostly split over these two excited states. The results are also compared to the distribution of the proton single-particle strength in the 90 Zr region (Z = 40,N = 50).

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Section: -10supporting

confidence: 51%

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
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“…The measured excited states are listed in Table III. The measured cross sections of the elastic α scattering relative to the Rutherford cross sections (Rutherford ratio) are presented in Figs we show only the cross sections to the excited states whose electromagnetic excitation strengths from the ground states were reported in the previous studies [24,[36][37][38].…”

Section: Fig 2 Excitation-energy Spectra For Thementioning

confidence: 99%

“…[46]. The values of α 0 and δ λ were determined to reproduce the known electromagnetic transition strengths [24,[36][37][38].…”

Section: B Macroscopic Transition Potentialsmentioning

confidence: 99%

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Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei

Adachi¹,

Kawabata

Minomo

et al. 2018

Phys. Rev. C

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We systematically measured the differential cross sections of inelastic α scattering off self-conjugate A = 4n nuclei at two incident energies E α = 130 MeV and 386 MeV at Research Center for Nuclear Physics, Osaka University. The measured cross sections were analyzed by the distorted-wave Born-approximation (DWBA) calculation using the single-folding potentials, which are obtained by folding macroscopic transition densities with the phenomenological αN interaction. The DWBA calculation with the density-dependent αN interaction systematically overestimates the cross sections for the ΔL = 0 transitions. However, the DWBA calculation using the density-independent αN interaction reasonably well describes all the transitions with ΔL = 0-4. We examined uncertainties in the present DWBA calculation stemming from the macroscopic transition densities, distorting potentials, phenomenological αN interaction, and coupled channel effects in 12 C. It was found that the DWBA calculation is not sensitive to details of the transition densities nor the distorting potentials, and the phenomenological density-independent αN interaction gives reasonable results. The coupled-channel effects are negligibly small for the 2 + 1 and 3 − 1 states in 12 C, but not for the 0 + 2 state. However, the DWBA calculation using the density-independent interaction at E α = 386 MeV is still reasonable even for the 0 + 2 state. We concluded that the macroscopic DWBA calculations using the density-independent interaction are reliably applicable to the analysis of inelastic α scattering at E α ∼ 100 MeV/u.

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“…9), those for M21v and M21s (only seven M2 transitions have been observed), E3 and M3 (none observed) are taken from ref. 10).…”

Section: Of Ref 4)mentioning

confidence: 99%

Spins, parities and isospins of 26Al levels: Shell-model aspects

et al. 1988

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Abstract:Two preceding papers on the 25Mg(p, y)26Al reaction have presented information on the energies, y-ray branchings, lifetimes and resonance partial widths of 26A1 states in the E x= 0-8.1 MeV region. These data (combined with information from other reactions) provide new J=; T assignments to 127 levels (of which 111 assignments are unambiguous), as discussed in the present paper.The states obtained from a shell-model calculation in the untruncated sd-shell are found to correspond one-to-one with the 30 lowest T = 1 and the 42 lowest T = 0 even-parity states; for many higher T = 0 states the correspondence could also be established.An extensive comparison has been made of experimental and calculated y-ray strengths. On the average E2 m strengths are calculated correctly, whereas M l~v strengths are high by a factor 1.85. For many levels the decay strengths are in excellent agreement, whereas the poor agreement for some pairs of neighbouring levels with the same J" ; T value could be ascribed to a poor description of the configuration mixing. In some cases the strength comparison has helped to establish the correspondence between calculated and experimental states.A comparison has also been made between T = 1 levels of 26A1 and 26Mg. For one (out of 44) 26A1 states the 26Mg parent is unknown, whereas for one 26Mg level the analogue in 26A1 has not been identified.

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Strengths of gamma-ray transitions in A = 6–44 nuclei (III)

Cited by 248 publications

References 53 publications

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
View full text Add to dashboard Cite

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
View full text Add to dashboard Cite

Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei

Spins, parities and isospins of 26Al levels: Shell-model aspects

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Strengths of gamma-ray transitions in A = 6–44 nuclei (III)

Cited by 248 publications

References 53 publications

Experimental study of theNi66(d,p) Ni67Diriken1, Raabe2, Eberth3 et al. 2015Phys. Rev. C9150View full textAdd to dashboardCite

Experimental study of theNi66(d,p) Ni67Diriken1, Raabe2, Eberth3 et al. 2015Phys. Rev. C9150View full textAdd to dashboardCite

Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei

Spins, parities and isospins of 26Al levels: Shell-model aspects

Contact Info

Product

Resources

About

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
View full text Add to dashboard Cite

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
View full text Add to dashboard Cite