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NSR database version of May 10, 2024.

Search: Author = B.Alshahrani

Found 4 matches.

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2020ER03      Phys.Rev. C 102, 024320 (2020)

T.K.Eriksen, T.Kibedi, M.W.Reed, A.E.Stuchbery, K.J.Cook, A.Akber, B.Alshahrani, A.A.Avaa, K.Banerjee, A.C.Berriman, L.T.Bezzina, L.Bignell, J.Buete, I.P.Carter, B.J.Coombes, J.T.H.Dowie, M.Dasgupta, L.J.Evitts, A.B.Garnsworthy, M.S.M.Gerathy, T.J.Gray, D.J.Hinde, T.H.Hoang, S.S.Hota, E.Ideguchi, P.Jones, G.J.Lane, B.P.McCormick, A.J.Mitchell, N.Palalani, T.Palazzo, M.Ripper, E.C.Simpson, J.Smallcombe, B.M.A.Swinton-Bland, T.Tanaka, T.G.Tornyi, M.O.de Vries

Improved precision on the experimental E0 decay branching ratio of the Hoyle state

NUCLEAR REACTIONS 12C(p, p'), E=10.5 MeV; measured electron-positron pairs for E0 transition from the first excited 0+ Hoyle state, and for E2 transition from the first 2+ state, Eγ, (ce)(ce)- and (ce)γ-coin, γ(θ), E(p), I(p) using the superconducting solenoid Super-e pair spectrometer and Si(Li) detector array for electrons and positrons, HPGe detector for γ radiation, and ANU BALiN double sided silicon strip detector array for scattered protons at the 14 UD pelletron tandem accelerator of Australian National University; deduced E0 branching ratio ΓE0π/Γ, reduction in radiative width. Comparison with previous experimental measurements; calculated 3α reaction rate within the temperature range of helium burning red giant stars using the NACRE library value. Possible impact on astrophysical calculations.

doi: 10.1103/PhysRevC.102.024320
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2020KI17      Phys.Rev.Lett. 125, 182701 (2020)

T.Kibedi, B.Alshahrani, A.E.Stuchbery, A.C.Larsen, A.Gorgen, S.Siem, M.Guttormsen, F.Giacoppo, A.I.Morales, E.Sahin, G.M.Tveten, F.L.Bello Garrote, L.Crespo Campo, T.K.Eriksen, M.Klintefjord, S.Maharramova, H.-T.Nyhus, T.G.Tornyi, T.Renstrom, W.Paulsen

Radiative Width of the Hoyle State from γ-Ray Spectroscopy

NUCLEAR REACTIONS 12C(p, p'), E=10.7 MeV; measured reaction products, Eγ, Iγ, γ-γ-p coin.; deduced γ-ray energies, resonances, radiative branching ratio, radiative widths. Comparison with available data.

doi: 10.1103/PhysRevLett.125.182701
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2019EV01      Phys.Rev. C 99, 024306 (2019)

L.J.Evitts, A.B.Garnsworthy, T.Kibedi, J.Smallcombe, M.W.Reed, A.E.Stuchbery, G.J.Lane, T.K.Eriksen, A.Akber, B.Alshahrani, M.de Vries, M.S.M.Gerathy, J.D.Holt, B.Q.Lee, B.P.McCormick, A.J.Mitchell, M.Moukaddam, S.Mukhopadhyay, N.Palalani, T.Palazzo, E.E.Peters, A.P.D.Ramirez, T.Tornyi, S.W.Yates

E0 transition strength in stable Ni isotopes

NUCLEAR REACTIONS 58,60,62Ni(p, p'), E=4.7-9.2 MeV; measured Eγ, Iγ, γ(θ), conversion electrons using the CAESAR array for γ detection and Super-e spectrometer for electron detection at ANU-Canberra. 58,60,62Ni(n, n'), E=2.42, 2.90 MeV; measured Eγ, Iγ, level half-lives by DSAM at the University of Kentucky Accelerator Laboratory. 58,60,62Ni; deduced levels, J, π, K-conversion coefficients, E2/M1 multipole mixing ratios and E0 admixtures in 2+ to 2+ transitions, 0+ to 0+ E0 transitions, electric monopole (E0) transition strengths, B(M1), B(E2). Comparison with evaluated data in Nuclear Data Sheets. Systematics of 2+ to 2+ and 0+ to 0+ monopole transition strengths ρ2(E0) in even-even nuclei with A<250.

doi: 10.1103/PhysRevC.99.024306
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2018EV01      Phys.Lett. B 779, 396 (2018)

L.J.Evitts, A.B.Garnsworthy, T.Kibedi, J.Smallcombe, M.W.Reed, B.A.Brown, A.E.Stuchbery, G.J.Lane, T.K.Eriksen, A.Akber, B.Alshahrani, M.de Vries, M.S.M.Gerathy, J.D.Holt, B.Q.Lee, B.P.McCormick, A.J.Mitchell, M.Moukaddam, S.Mukhopadhyay, N.Palalani, T.Palazzo, E.E.Peters, A.P.D.Ramirez, S.R.Stroberg, T.Tornyi, S.W.Yates

Identification of significant E0 strength in the 2+2 → 2+1 transitions of 58, 60, 62Ni

NUCLEAR REACTIONS 58,60,62Ni(p, p'), E<9.2 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, nuclear and quadrupole moments, B(E2), B(M1). Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2018.01.076
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