Levels in<sup>25</sup>Mg

Dubois, Jean; Roth, H. A.; Jarneborn, L.

doi:10.1088/0031-8949/14/5/001

Cited by 6 publications

(3 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A considerable number of preceeding investigations [10][11][12][13][16][17][18] had concentrated on the levels up to and including the 6081 keV state. A closely spaced doublet consisting of levels at 5744 +_ 2 and 5748 _+ 2 keV excitation energy could be identified here, thus explaining difficulties [17,18] in previous attempts to arrive at a consistent decay scheme of the alleged 5.75 MeV level. Exceptions are the 3971, 4722, and 5012 keV levels where the present results are cited.…”

Section: Level Scheme and Y-decay Modesmentioning

confidence: 99%

The structure of25Mg

Heidinger

Betz

Brendler

et al. 1991

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

Gamma-decay modes and spin(-parity) assignments of levels in 25Mg have been systematically investigated up to 10 MeV excitation energy by particle-y-ray angularcorrelation measurements with the 24Mg(d, PY) reaction at 6.5 MeV bombarding energy and with the 22Ne(e, ny) reaction at 11.8, 12.5, 14.4 and 15.5 MeV bombarding energy. A level scheme has been established which is comprehensive up to 8.3 MeV excitation energy for I<9/2 and up to 10 MeV for 9/2

show abstract

Section: Level Scheme and Y-decay Modesmentioning

confidence: 99%

The structure of25Mg

Heidinger

Betz

Brendler

et al. 1991

Z. Physik A - Hadrons and Nuclei

View full text Add to dashboard Cite

show abstract

“…There does not appear, in fact, to be any good candidate for a 3/2+ rotational member based on 1/2+ [211] orbit. We have encounted the same situation in ZINe and 21Na [14,19,201. In spite of the well behaved rotational band based on the 23Ne ground state we think it most probable that the 1/2+ level at 1017 keV is a 2sli2 state with no stable deformation of the nuclear core and accordingly that no rotational band can appear. This interpretation does not significantly change the theoretical prediction of the lifetime for the 1017 keV level-it is still in good agreement with the experimental result.…”

Section: Theoretical Calculations and Discussionmentioning

confidence: 89%

New Levels in²³Ne

Dubois¹,

Odelius²,

Roth³

1974

Phys. Scr.

View full text Add to dashboard Cite

The 22Ne(d,pγ)23Ne-reaction has been studied using particle-gamma and gamma-gamma coincidence techniques. An annular, surface barrier detector and Ge(Li)-detectors were used together with multi-dimensional storage of data in a PDP-15 on-line computer. Energies and gamma radiation branching ratios of levels in 23Ne up to 4.0 MeV have been measured. New levels at 3 458.2 ± 0.6 keV, 3 830.5 ± 1.2 keV, 3 843.3 ± 1.1 keV and 4 010 ± 3 keV are suggested. All levels up to 4 MeV have been accounted for by the Nilsson model by including Coriolis mixing and by assuming that the nucleus is not deformed in the 2 s 1/2-state at 1 017 keV. Gamma radiation branching ratios are discussed. The experimental results are also compared with recent shell model calculations.

show abstract

“…Concerning the other two proposed transfer mechanisms, there are currently no 23 Na(α, d) reaction data available for comparison, and while some relevant 22 Ne(α, nγ) data do exist [73,77,78], the associated publications do not show excitation spectra of 25 Mg or report specific selectivity of the reaction. As a result comparisons with (α, d) or (α, n) spectra are not currently possible.…”

Section: Mg Reactionmentioning

confidence: 99%

Study of ($^6$Li, $d$) and ($^6$Li, $t$) reactions on $^{22}$Ne and implications for $s$-process nucleosynthesis

Ota,

Christian,

Catford

et al. 2021

Preprint

View full text Add to dashboard Cite

We studied α cluster states in 26 Mg via the 22 Ne( 6 Li,dγ) 26 Mg reaction in inverse kinematics at an energy of 7 MeV/nucleon. States between Ex = 4 -12 MeV in 26 Mg were populated and relative α spectroscopic factors were determined. Some of these states correspond to resonances in the Gamow window of the 22 Ne(α,n) 25 Mg reaction, which is one of the main neutron sources in the astrophysical s-process. We show that α-cluster strength of the states analyzed in this work have critical impact on s-process abundances. Using our new 22 Ne(α,n) 25 Mg and 22 Ne(α,γ) 26 Mg reaction rates, we performed new s-process calculations for massive stars and Asymptotic Giant Branch stars and compared the resulting yields with the yields obtained using other 22 Ne+α rates from the literature. We observe an impact on the s-process abundances up to a factor of three for intermediate-mass AGB stars and up to a factor of ten for massive stars. Additionally, states in 25 Mg at Ex < 5 MeV are identified via the 22 Ne( 6 Li,t) 25 Mg reaction for the first time. We present the ( 6 Li, t) spectroscopic factors of these states and note similarities to the (d, p) reaction in terms of reaction selectivity.

show abstract

Levels in²⁵Mg

Abstract: The reactions 22Ne(α,nγ)25Mg and 24Mg(d,pγ)25Mg have been studied at E α = 10 MeV and E d = 4.7 MeV using particle-gamma and gamma-gamma coincidence technique. Energies and gamma radiation branching ratios of levels in 25Mg up to 6 MeV have been obtained.

Cited by 6 publications

References 12 publications

The structure of25Mg

The structure of25Mg

New Levels in²³Ne

Study of ($^6$Li, $d$) and ($^6$Li, $t$) reactions on $^{22}$Ne and implications for $s$-process nucleosynthesis

Contact Info

Product

Resources

About

Levels in25Mg

Abstract: The reactions 22Ne(α,nγ)25Mg and 24Mg(d,pγ)25Mg have been studied at E α = 10 MeV and E d = 4.7 MeV using particle-gamma and gamma-gamma coincidence technique. Energies and gamma radiation branching ratios of levels in 25Mg up to 6 MeV have been obtained.

Cited by 6 publications

References 12 publications

The structure of25Mg

The structure of25Mg

New Levels in23Ne

Study of ($^6$Li, $d$) and ($^6$Li, $t$) reactions on $^{22}$Ne and implications for $s$-process nucleosynthesis

Contact Info

Product

Resources

About

Levels in²⁵Mg

New Levels in²³Ne