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NSR database version of May 8, 2024.

Search: Author = R.Rafiei

Found 11 matches.

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2022HI12      Phys.Rev. C 106, 064614 (2022)

D.J.Hinde, R.du Rietz, D.Y.Jeung, K.J.Cook, M.Dasgupta, E.C.Simpson, R.G.Thomas, M.Evers, C.J.Lin, D.H.Luong, L.R.Gasques, R.Rafiei, A.Wakhle, C.Simenel

Experimental investigation of the role of shell structure in quasifission mass distributions

NUCLEAR REACTIONS ¹⁵⁴Sm, ¹⁶²Dy, ¹⁷⁰Er, ¹⁷⁴Yb, ¹⁸⁶W, ¹⁹²Os, ¹⁹⁶Pt, ²⁰⁰Hg(⁴⁸Ti, F), E=198-245 MeV; measured reaction products; deduced fission fragment mass-angle distributions, ratio of the fusion-fission yield to the total fission yield, mass-ratio spectra, compound nuclei forming probability. Pointed that with increasing target (or equivalently compound nucleus)atomic number, a rapid transition occurs from dominant fusion-fission to dominantly quasifission. Comparison to GEF calculations. Position-sensitive multiwire proportional counters (MWPCs) at 14UD tandem electrostatic accelerator (Australian National University).

doi: 10.1103/PhysRevC.106.064614
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2021JE02      Phys.Rev. C 103, 034603 (2021)

D.Y.Jeung, D.J.Hinde, E.Williams, M.Dasgupta, E.C.Simpson, R.du Rietz, D.H.Luong, R.Rafiei, M.Evers, I.P.Carter, K.Ramachandran, C.Palshetkar, D.C.Rafferty, C.Simenel, A.Wakhle

Energy dissipation and suppression of capture cross sections in heavy ion reactions

NUCLEAR REACTIONS ²³²Th(¹⁸O, X), (³⁰Si, X), (³⁴S, X), (⁴⁰Ca, X), E(cm)=145-203 MeV; measured binary reaction products, including pairs of fission fragments, scattered beam particles and recoils in coincidence, and σ(θ) using the CUBE spectrometer at the 14UD tandem accelerator of Australian National University Heavy Ion Accelerator Facility; deduced distributions of the source velocity components of the fissioning nuclei, mass angle distributions (MADs), CC capture cross sections, full momentum transfer (FMT) fission cross sections, ratio of sequential fission to capture-fission, capture barriers. Comparison with coupled-channel (CC) calculations using CCFULL code; discussed sequential and total fission cross sections.

doi: 10.1103/PhysRevC.103.034603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD1001.

2013LU13      Phys.Rev. C 88, 034609 (2013)

D.H.Luong, M.Dasgupta, D.J.Hinde, R.du Rietz, R.Rafiei, C.J.Lin, M.Evers, A.Diaz-Torres

Predominance of transfer in triggering breakup in sub-barrier reactions of ^{6, 7}Li with ¹⁴⁴Sm, ^{207, 208}Pb, and ²⁰⁹Bi

NUCLEAR REACTIONS ^207,208Pb, ²⁰⁹Bi(⁶Li, X), E=26.5, 29.0 MeV; ¹⁴⁴Sm(⁷Li, X), E=21.5, 24.0 MeV; ²⁰⁸Pb, ²⁰⁹Bi(⁷Li, X), E=24.0, 29.0 MeV; ²⁰⁷Pb(⁷Li, X), E=24.0, 29.0, 26.5 MeV; measured spectra of charged breakup fragments in binary coincidence mode using BALIN detector array at ANU Heavy Ion Accelerator Facility; deduced Q-value spectra of α+p, α+d, α+t, α+α modes of breakup of ^6,7Li, relative time scales and relative energy spectra of breakup fragments, relative probabilities of major breakup modes. Dominance of nucleon transfer-initiated breakup.

doi: 10.1103/PhysRevC.88.034609
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2011EV01      Phys.Rev. C 84, 054614 (2011)

M.Evers, M.Dasgupta, D.J.Hinde, D.H.Luong, R.Rafiei, R.du Rietz, C.Simenel

Cluster transfer in the reaction ¹⁶O + ²⁰⁸Pb at energies well below the fusion barrier: A possible doorway to energy dissipation

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁶O, X), E(c.m.)=73.28 MeV; ¹⁸¹Ta(¹²C, X), E=53.79 MeV; measured particle spectra of projectile-like fragments, transfer probabilities for 1p, 2p and α particle transfers. Comparison with TDHF calculations.

doi: 10.1103/PhysRevC.84.054614
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2011RA17      Int.J.Mod.Phys. E20, 835 (2011)

R.Rafiei, D.H.Luong, D.J.Hinde, M.Dasgupta, R.Du Rietz

Complete characterization of breakup of ⁹Be by α-α coincidence measurements

NUCLEAR REACTIONS ²⁰⁹Bi, ²⁰⁸Pb, ¹⁹⁶Pt, ¹⁸⁶W, ¹⁶⁸Er, ¹⁴⁴Sm(⁹Be, xα), E not given; measured reaction products; deduced breakup probabilities.

doi: 10.1142/S0218301311018794
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2010DA15      Nucl.Phys. A834, 147c (2010)

M.Dasgupta, L.R.Gasques, D.H.Luong, R.du Rietz, R.Rafiei, D.J.Hinde, C.J.Lin, M.Evers, A.Diaz-Torres

Reaction dynamics of weakly bound nuclei at near-barrier energies

NUCLEAR REACTIONS ²⁰⁸Pb, ²⁰⁹Bi(⁶Li, X), (⁷Li, X), (⁹Be, X), (¹⁰B, X), (¹¹B, X), E not given; analyzed fusion suppression factor, systematics. Found simple dependency and relation to break-up.

doi: 10.1016/j.nuclphysa.2009.12.025
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2010EV01      Phys.Rev. C 81, 014602 (2010)

M.Evers, D.J.Hinde, M.Dasgupta, D.H.Luong, R.Rafiei, R.du Rietz

Coulomb nuclear interference as a tool to investigate the nuclear potential

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁶O, X), E(cm)=50-75 MeV; measured particle spectra. ²⁰⁸Pb; deduced excitation function of octupole vibrational state at 2.615 MeV; analyzed earlier quasielastic scattering excitation function data, and coulomb nuclear nuclear interface (CNI) using coupled-channel calculations.

doi: 10.1103/PhysRevC.81.014602
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2010RA03      Phys.Rev. C 81, 024601 (2010)

R.Rafiei, R.du Rietz, D.H.Luong, D.J.Hinde, M.Dasgupta, M.Evers, A.Diaz-Torres

Mechanisms and systematics of breakup in reactions of ⁹Be at near-barrier energies

NUCLEAR REACTIONS ²⁰⁸Pb, ²⁰⁹Bi(⁹Be, X), E=28-40 MeV; ¹⁸⁶W, ¹⁹⁶Pt(⁹Be, X), E=25-37 MeV; ¹⁴⁴Sm, ¹⁶⁸Er(⁹Be, X), E=25-34 MeV; measured particle spectra, reaction Q-values; deduced near-barrier breakup yields, breakup probability, breakup modes, and energy correlation of fragments. Mechanisms and systematics of breakup in reactions. Monte Carlo simulation of ⁸Be g.s. decay.

doi: 10.1103/PhysRevC.81.024601
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2008EV01      Phys.Rev. C 78, 034614 (2008)

M.Evers, M.Dasgupta, D.J.Hinde, L.R.Gasques, M.L.Brown, R.Rafiei, R.G.Thomas

Systematic study of the nuclear potential diffuseness through high precision back-angle quasi-elastic scattering

NUCLEAR REACTIONS ^144,154Sm, ¹⁶⁶Er, ¹⁸⁶W, ¹⁹⁷Au, ²⁰⁸Pb(¹⁶O, ¹⁶O), E=17-26 MeV; measured yields, σ(θ), diffuseness parameter. Coupled-channel calculations.

doi: 10.1103/PhysRevC.78.034614
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2008HI07      Phys.Rev.Lett. 100, 202701 (2008)

D.J.Hinde, R.G.Thomas, R.du Rietz, A.Diaz-Torres, M.Dasgupta, M.L.Brown, M.Evers, L.R.Gasques, R.Rafiei, M.D.Rodriguez

Disentangling Effects of Nuclear Structure in Heavy Element Formation

NUCLEAR REACTIONS ¹⁸⁶W(⁴⁶Ti, X), ¹⁸⁴W(⁴⁸Ti, X), ¹⁸²W(⁵⁰Ti, X), E=222-241 MeV; measured²³²Cm compound nucleus mass-angle distributions, mass ratio distributions, fission cross sections; model independent analysis; shell structure effects; comparison with FRLDM calculations.

doi: 10.1103/PhysRevLett.100.202701
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2008RA07      Phys.Rev. C 77, 024606 (2008)

R.Rafiei, R.G.Thomas, D.J.Hinde, M.Dasgupta, C.R.Morton, L.R.Gasques, M.L.Brown, M.D.Rodriguez

Strong evidence for quasifission in asymmetric reactions forming ²⁰²Po

NUCLEAR REACTIONS ¹⁸⁶Os(¹⁶O, X)²⁰²Po, E=74-105 MeV; ¹⁷⁸Hf(²⁴Mg, X)²⁰²Po, E=106-144 MeV; ¹⁶⁸Er(³⁴S, X)²⁰²Po, E=141-174 MeV; ¹⁵⁴Sm(⁴⁸Ti, X)²⁰²Po, E=198-235 MeV; measured mass-angle correlations, mass ratio distributions, cross sections.

doi: 10.1103/PhysRevC.77.024606
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