Étude du noyau 28Mg par la réaction 26Mg(t, pγ)28Mg

Rastegar, B.; Guillaume, G.; Fintz, P.; Gallmann, A.

doi:10.1016/0375-9474(74)90366-2

Cited by 14 publications

(7 citation statements)

References 7 publications

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“…The physical quantities and decay paths marked by asterisks are newly found ones in the present work. The known spins and parities [23,24] labeled by daggers were confirmed in the present work. The β-decay branching ratios and log f t values are listed in Table III.…”

Section: A Construction Of 28 Na Decay Schemesupporting

confidence: 85%

“…6). Six γ rays of 1152, 2548, 3405, 3694, 3995, and 5193 keV, which were observed in the 26 Mg(t, p) 28 Mg reaction [23,24], were also newly found as the transitions after the β decay of 28 [25], but it was not adopted in Ref. [26].…”

Section: A Construction Of 28 Na Decay Schemementioning

confidence: 99%

“…The level structure of 28 Mg has been investigated by the 26 Mg(t, p) 28 Mg reaction [21][22][23][24] and the β decay of 28 Na [14,25]. Middleton and Pullen [22] assigned the spins and parities of nine levels by the angular distribution of the proton.…”

Section: Introductionmentioning

confidence: 99%

“…Rastegar et al [24] reported additional assignments for another five levels from the angular correlation between protons and γ rays. They revised the previous 0 + assignment [22] for the 5.272-MeV level to 1 − .…”

Section: Introductionmentioning

confidence: 99%

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Structure of28Mg studied byβ-decay spectroscopy of spin-polarized28Na: The first step of systematic studies on neutron-rich Mg isotopes

et al. 2012

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As the first step of systematic studies on neutron-rich Mg isotopes, the structure of 28 Mg has been investigated by β-decay spectroscopy of spin-polarized 28 Na at TRIUMF. Spin-parity assignments have been successfully performed for levels in 28 Mg by taking advantage of the anisotropic β decay. Previous assignments for three levels were reconfirmed. New assignments were performed for four levels including a newly found 2 + level at 7.461 MeV. The experimental results were compared, on a level-by-level basis, with the shell-model calculation in the model space restricted to the sd shell. Overall good agreement between the experimental and theoretical results indicates dominance of the normal configurations in most of the 28 Mg levels. High performance of the present method promises successful application to heavier Mg isotopes to elucidate the shell evolution in the region of the N = 20 island of inversion.

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Section: A Construction Of 28 Na Decay Schemesupporting

confidence: 85%

Section: A Construction Of 28 Na Decay Schemementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structure of28Mg studied byβ-decay spectroscopy of spin-polarized28Na: The first step of systematic studies on neutron-rich Mg isotopes

et al. 2012

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“…Negative parity states in particular provide an explicit indication of intruder orbital occupation. To-date, only one negative parity level (I π = 3 − ) has been identified in 28 Mg, based on angular correlation measurements by Rastegar et al [15]. An I π = 0 − state resulting from the coupling of neutrons in the sd and pf shells would be a particularly strong constraint for the single particle energies, due to the limited number of available configurations which couple to zero spin.…”

Section: Introductionmentioning

confidence: 99%

Structure of Mg28 and influence of the neutron pf shell

et al. 2019

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Gamma-ray spectroscopy and lifetime measurements using the Doppler Shift Attenuation Method (DSAM) were performed on the nucleus 28 Mg near the N = 20 'island of inversion', which was populated using a 12 C(18 O,2p) 28 Mg fusion-evaporation reaction to investigate the impact of shell evolution on its high-lying structure. Three new levels were identified at 7203(3), 7747(2), and 7929.3(12) keV along with several new gamma rays. A newly extracted B(E2; 4 + 1 → 2 + 1) of 42(7) e 2 fm 4 indicates reduced collectivity in the yrast band at high spin, consistent with ab initio SA-NCSM calculations. At high excitation energy, evidence for the population of intruder orbitals was obtained through identification of negative parity levels (I π = (0, 4) − , (4, 5) −). Calculations using the SDPF-MU interaction indicate that these levels arise from single neutron excitation to the pf shell and provides evidence for the lowering of these intruder orbitals approaching the 'island of inversion'.

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Multi-band spectra of odd and even nuclei of the s-d shell

Parikh¹

1976

Pramana - J Phys

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Étude du noyau 28Mg par la réaction 26Mg(t, pγ)28Mg

Cited by 14 publications

References 7 publications

Structure of28Mg studied byβ-decay spectroscopy of spin-polarized28Na: The first step of systematic studies on neutron-rich Mg isotopes

Structure of28Mg studied byβ-decay spectroscopy of spin-polarized28Na: The first step of systematic studies on neutron-rich Mg isotopes

Structure of Mg28 and influence of the neutron pf shell

Multi-band spectra of odd and even nuclei of the s-d shell

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