Nuclear Data Sheets for A=23

Basunia, M. S.; Chakraborty, A.

doi:10.1016/j.nds.2020.12.001

Cited by 10 publications

(8 citation statements)

References 368 publications

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“…Error on τ in % γ-ray energy resolution 1 15 γ-ray absolute angle (1 deg) 2 12 γ-ray angle resolution 1 12 Stopping powers 3 10 Beam energy dispersion 1 6.5 Implementation profile of 3 He ions 3 6.0 γ-ray energy shift during runs 4 3.5 Transverse spatial dispersion of the beam 1 0.3 Total 26…”

Section: Source Of Errormentioning

confidence: 99%

“…3 From SRIM 19 -EVASIONS simulations, considering 20 % uncertainty in stopping powers tables. 4 From the energy calibration stability measured throughout the experiment.…”

Section: Source Of Errormentioning

confidence: 99%

“…Search for 22 Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes C. Fougères 1,2* , F. de Oliveira Santos 1* , J. José 3,4 , C.…”

mentioning

confidence: 99%

“…3 Departament de Física, EEBE, Universitat Politècnica de Catalunya, Barcelona, Spain. 4 Institut d'Estudis Espacials de Catalunya, Barcelona, Spain. 5 Institut Laue-Langevin, Grenoble, France.…”

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Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Fougères

Santos

José

et al. 2022

Preprint

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Classical novae are thermonuclear explosions in stellar binary systems, and important sources of 26Al and 22Na1-3. While γ rays from the decay of the former radioisotope have been observed through-out the Galaxy, 22Na remains untraceable. The half-life of 22Na (2.6 yr4) would allow the observation of its 1.275 MeV γ-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of the nuclear reactions involved in the production and destruction of this nucleus5. The 22Na(p, γ)23Mg5 reaction remains the only source of large uncertainty about the amount of 22Na ejected. Its rate is dominated by a single reso- nance on the short-lived state at 7785.0(7) keV in 23Mg6. In the present work, a combined analysis of particle-particle correlations and velocity-difference profiles is proposed to measure femtosecond nuclear lifetimes. The application of this novel method to the study of the 23Mg states, combining magnetic and highly-segmented tracking γ-ray spectrometers, places strong limits on the amount of 22Na produced in novae, explains its non-observation to date in γ rays (flux < 2.5×10−4 ph.cm−2s−1 7), and constrains its detectability with future space-borne observatories.

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Section: Source Of Errormentioning

confidence: 99%

“…3 From SRIM 19 -EVASIONS simulations, considering 20 % uncertainty in stopping powers tables. 4 From the energy calibration stability measured throughout the experiment.…”

Section: Source Of Errormentioning

confidence: 99%

“…Search for 22 Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes C. Fougères 1,2* , F. de Oliveira Santos 1* , J. José 3,4 , C.…”

mentioning

confidence: 99%

unclassified

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Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Fougères

Santos

José

et al. 2022

Preprint

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“…The values for the Mg isotopes have been taken from Refs. [7, 35- 38], the values for Ne from Refs [6,8,13,15,35,39]…”

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confidence: 99%

Border of the Island of Inversion: Unbound states in $^{29}$Ne

Holl,

Lindberg,

Heinz

et al. 2022

Preprint

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The nucleus 29 Ne is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder f 7/2 -state, which would place 29 Ne firmly inside the island of inversion, has yet been observed. Here, the first investigation of unbound states of 29 Ne is reported. The states were populated in 30 Ne(p, pn) and 30 Na(p, 2p) reactions at a beam energy of around 230 MeV/nucleon, and analyzed in terms of their resonance properties, partial cross sections and momentum distributions. The momentum distributions are compared to calculations using the eikonal, direct reaction model, allowing -assignments for the observed states. The lowest-lying resonance at an excitation energy of 1.48(4) MeV shows clear signs of a significant =3-component, giving first evidence for f 7/2 single particle strength in 29 Ne. The excitation energies and strengths of the observed states are compared to shell-model calculations using the sdpf-u-mix interaction.

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Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Fougères,

de Oliveira Santos,

José

et al. 2023

Nat Commun

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Classical novae are thermonuclear explosions in stellar binary systems, and important sources of 26Al and 22Na. While γ rays from the decay of the former radioisotope have been observed throughout the Galaxy, 22Na remains untraceable. Its half-life (2.6 yr) would allow the observation of its 1.275 MeV γ-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of its nucleosynthesis. The 22Na(p, γ)23Mg reaction remains the only source of large uncertainty about the amount of 22Na ejected. Its rate is dominated by a single resonance on the short-lived state at 7785.0(7) keV in 23Mg. Here, we propose a combined analysis of particle-particle correlations and velocity-difference profiles to measure femtosecond nuclear lifetimes. The application of this method to the study of the 23Mg states, places strong limits on the amount of 22Na produced in novae and constrains its detectability with future space-borne observatories.

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Nuclear Data Sheets for A=23

Cited by 10 publications

References 368 publications

Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

Border of the Island of Inversion: Unbound states in $^{29}$Ne

Search for 22Na in novae supported by a novel method for measuring femtosecond nuclear lifetimes

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