<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>β</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-Delayed-Proton Decay of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Mg</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>21</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></m

Sextro, R.G.; Gough, Richard; Cerny, Joseph

doi:10.1103/physrevc.8.258

Cited by 40 publications

(85 citation statements)

References 28 publications

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“…Energy calibration for the DSSSD was done with known β-delayed protons from the decay of 21 Mg [27], which have energies of 1257 (10) as an internal calibration to obtain a more reliable extrapolated down to the interesting energy region around 200 keV. The 21 Mg beam, which is only a weak byproduct of our reaction (see Fig.…”

Section: B Proton Spectrummentioning

confidence: 99%

Experimental study ofβ-delayed proton decay ofAl23for nucleosynthesis in novae

et al. 2011

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The β-delayed γ and proton decay of 23 Al has been studied with a novel detector setup at the focal plane of the MARS separator at Texas A&M University. We could detect protons down to an energy of 200 keV and determine the corresponding branching ratios. Contrary to results of previous β-decay studies, no strong proton intensity from the decay of the isobaric analog state (IAS) of the 23 Al ground state at Ex = 7803 keV in 23 Mg, was observed. Instead we assign the observed low energy group Ep,cm = 206 keV to the decay from a state 16 keV below the IAS. We measured both proton and gamma branches from the decay of this state at Ex = 7787 keV in 23 Mg, a very rare case in the literature. Combining our data with its measured lifetime, we determine its resonance strength to be ωγ = 1.4 +0.5 −0.4 meV. The value is in agreement with older direct measurements, but disagrees with a new direct measurement. This state is the most important resonance for the radiative proton capture 22 Na(p,γ) 23 Mg in some astrophysical environments, such as novae.

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Section: B Proton Spectrummentioning

confidence: 99%

Experimental study ofβ-delayed proton decay ofAl23for nucleosynthesis in novae

et al. 2011

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“…In the case of 21 Mg, Q EC = 13.098(16) MeV [4], the β + -decay to bound states of 21 Na has a branching ratio of 67(7) % [5]. The only other identified decay mode is β-delayed proton emission to states in 20 Ne, but βα, βαp, and βpα are all energetically allowed.…”

Section: Introductionmentioning

confidence: 99%

Beta-delayed proton emission from 21Mg

et al. 2015

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Abstract. Beta-delayed proton emission from 21 Mg has been measured at ISOLDE, CERN, with a detection setup including particle identification capabilities. β-delayed protons with center of mass energies between 0.39 MeV and 7.2 MeV were measured and used to determine the half life of 21 Mg as 118.6±0.5 ms. From a line shape fit of the βp branches we extract spectroscopic information about the resonances of 21 Na. Finally an improved interpretation of the decay scheme in accordance with the results obtained in reaction studies is presented.PACS. 23.40.Hc Relation with nuclear matrix elements and nuclear structure -27.30.+t 20 ≤ A ≤ 38 -29.30.Ep Charged-particle spectroscopy

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“…In order of sensitivity, 45 Cr, 45 V(4791 keV), 29 S, 21 Mg and 49 Mn(4833 keV) masses are seen to require sub-2σ shifts for the d-coefficient to become compatible with zero. For these cases, the question of a cubic or quadratic IMME can potentially be resolved through precision alone.…”

Section: T = 3 2 Key Measurementsmentioning

confidence: 99%

“…There is only one intermediate case, that of the 21 Na(8974 keV) IAS [21] last observed in 1973, which would require a shift of −8.7 keV for the d-coefficient to become compatible with zero. However, this proton-unbound level is already known to ±4 keV [2], which in itself is already an excellent precision for this case.…”

Section: T = 3 2 Key Measurementsmentioning

confidence: 99%

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Beyond the Isobaric Multiplet Mass Equation

MacCormick¹

2015

Proceedings of the Conference on Advances in Radioactive Isotope Science (ARIS2014)

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Isospin is a fundamental symmetry in nature and can be used to gleam information on nuclear structure. Within the charge independence hypothesis of the nuclear force, the Coulomb energy component of nuclear mass can be described as an isospin dependent function through the Isobaric multiplet Mass Equation. This symmetry has been studied in a recent up-to-date and complete evaluation of ground state Isobaric Analogue State masses and the associated Isobaric Multiplet Mass Equation coefficients have been extracted. In this paper, isobaric multiplets beyond the standard first-order quadratic description are presented, and repercussions on future experimental programs are explored.

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β+-Delayed-Proton Decay ofMg21

Cited by 40 publications

References 28 publications

Experimental study ofβ-delayed proton decay ofAl23for nucleosynthesis in novae

Experimental study ofβ-delayed proton decay ofAl23for nucleosynthesis in novae

Beta-delayed proton emission from 21Mg

Beyond the Isobaric Multiplet Mass Equation

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