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NSR database version of April 26, 2024.

Search: Author = T.Ahmad

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2024AL04      J.Phys.(London) G51, 015101 (2024)

S.Ali, M.Gull, K.Kumar, T.Ahmad, I.A.Rizvi, A.Agarwal, S.S.Ghugre, R.N.Ali, F.Khan

Systematic study of fusion suppression and its dependency on projectile breakup threshold energy

NUCLEAR REACTIONS ⁹³Nb(²⁰Ne, X)¹⁰⁹Sn/¹⁰⁸Sn/¹⁰⁵Cd/¹⁰⁴Cd/¹⁰⁹In/¹⁰⁸In/¹⁰⁷In/¹⁰⁵In/¹⁰³Ag/¹⁰¹Pd/¹⁰⁰Rh/⁹⁸Rh, E=145 MeV; measured reaction products, Eγ, Iγ; deduced σ and uncertainties, an empirical formula is proposed to interrelate the degree of fusion suppression and breakup threshold energy of the incident projectile. Comparison with the universal fusion function (UFF) to estimate the degree of fusion incompleteness, PACE4 calculations. The K130 cyclotron facility at the Variable Energy Cyclotron Centre (VECC), Kolkata, India.

doi: 10.1088/1361-6471/ad0a3b
Citations: PlumX Metrics

2021AH04      Chin.J.Phys.(Taiwan) 72, 299 (2021)

T.Ahmad

A study of ¹²C and ²⁸Si interactions with heavy emulsion targets

NUCLEAR REACTIONS Br, Ag(¹²C, X), (²⁸Si, X), E=4.5 GeV/nucleon; analyzed available data; deduced mean compound multiplicity increase with projectile mass.

doi: 10.1016/j.cjph.2021.04.010
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2019AL33      Phys.Rev. C 100, 064607 (2019)

S.Ali, K.Kumar, M.Gull, T.Ahmad, I.A.Rizvi, A.Agarwal, A.K.Chaubey, S.S.Ghugre

Systematic of fusion incompleteness in reactions induced by α cluster projectiles

NUCLEAR REACTIONS ¹⁶⁵Ho(²⁰Ne, 3n)¹⁸²Ir, (²⁰Ne, 2np)¹⁸²Os, (²⁰Ne, 3np)¹⁸¹Os, (²⁰Ne, 5np)¹⁷⁹Os, (²⁰Ne, α)¹⁸¹Re, (²⁰Ne, 2nα)¹⁷⁹Re, (²⁰Ne, 3nα)¹⁷⁸Re, (²⁰Ne, 4nα)¹⁷⁷Re, (²⁰Ne, 3npα)¹⁷⁷W, (²⁰Ne, 4npα)¹⁷⁶W, (²⁰Ne, 2n2α)¹⁷⁵Ta, (²⁰Ne, 3np2α)¹⁷³Hf, (²⁰Ne, 3n2α)¹⁷⁴Ta, (²⁰Ne, 4n2α)¹⁷³Ta, E=90.2, 98.4, 108.2, 121.9, 132.6, 145.0 MeV; measured off-line Eγ, Iγ, total σ(E) of observed evaporation residues (ERs) using activation method; deduced fusion σ(E), incomplete fusion probability. ⁸⁹Y, ⁹³Nb, ¹¹⁵In, ¹⁵⁹Tb, ¹⁶⁵Ho, ¹⁸¹Ta(¹²C, X), E(breakup threshold)=7.36 MeV; ⁴⁹Sc, ⁵¹V, ⁸⁹Y, ¹⁰³Rh, ¹¹⁵In, ¹³⁰Te, ¹⁵⁹Tb, ¹⁶⁵Ho, ¹⁶⁹Tm, ¹⁸¹Ta(¹⁶O, X), E(breakup threshold)=7.16 MeV; ⁵¹V, ⁵⁵Mn, ⁵⁹Co, ¹⁵⁹Tb, ¹⁶⁵Ho, ¹⁶⁹Tm(²⁰Ne, X), E(breakup threshold)=4.73 MeV; analyzed fusion σ data to deduce critical angular momentum, and compared with prediction of sum rule. Comparison with statistical model calculations using PACE4 code. ¹⁷³Ta, ¹⁷⁹Os; measured half-life decay curves.

doi: 10.1103/PhysRevC.100.064607
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6375.

2018AL18      Eur.Phys.J. A 54, 56 (2018)

S.Ali, T.Ahmad, K.Kumar, M.Gull, I.A.Rizvi, A.Agarwal, S.S.Ghugre, A.K.Sinha, A.K.Chaubey

Role of partial linear momentum transfer on incomplete fusion reaction

NUCLEAR REACTIONS ⁵¹V(²⁰Ne, xnp), (²⁰Ne, 2nα), (²⁰Ne, xnp), (²⁰Ne, xnpα), (²⁰Ne, xn2α), (²⁰Ne, 2p2α), E≈145 MeV; measured residues Eγ, Iγ; deduced residues yields vs cumulative thickness, most probable range, UFF (Universal Fusion Function); calculated most probable range using SRIM code, angular momentum distribution at E=70, 98, 145 MeV using CCFULL code.

doi: 10.1140/epja/i2018-12491-8
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6327.

2018GU13      Phys.Rev. C 98, 034603 (2018)

M.Gull, K.Kumar, S.Ali, T.Ahmad, S.Dutt, I.A.Rizvi, A.Agarwal, R.Kumar

Incomplete fusion in ¹⁶O + ⁸⁹Y reactions at energies of ≈ 7 MeV/nucleon

NUCLEAR REACTIONS ⁸⁹Y(¹⁶O, 4n), (¹⁶O, 3np), (¹⁶O, 5np), (¹⁶O, nα), (¹⁶O, 2nα), (¹⁶O, 3nα), (¹⁶O, 2n2α), (¹⁶O, 3n2α)¹⁰¹Ag/¹⁰¹Pd/⁹⁹Pd/¹⁰⁰Rh/^99mRh/⁹⁸Rh/⁹⁵Tc/⁹⁴Tc, E AP 105 MeV; measured Eγ, Iγ of radioactive evaporation residues, σ for evaporation residues by γ-activation method, forward recoil range distributions (FRRD), complete- and incomplete-fusion Q-values and threshold energies at the 15UD accelerator facility of IUAC-New Delhi; deduced fusion function. Comparison with universal fusion function and fusion functions of ¹⁶O beam on various targets. Comparison with theoretical calculations using PACE4 code. ⁹⁴Tc, ¹⁰¹Ag; measured half-lives of decays of ground states from decay curves for γ rays.

doi: 10.1103/PhysRevC.98.034603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6346.

2014KU08      Phys.Rev. C 89, 054614 (2014)

K.Kumar, T.Ahmad, S.Ali, I.A.Rizvi, A.Agarwal, R.Kumar, A.K.Chaubey

Role of incomplete fusion of the projectile in the ¹⁶O + ¹¹⁵In interaction at low energies

NUCLEAR REACTIONS ¹¹⁵In(¹⁶O, X)¹¹⁶Sb/¹¹⁷Sb/^118mSb/¹¹⁹I/¹²⁰I/^120mI/¹²¹I/¹²²Xe/¹²³Xe/¹²⁵Xe/¹²⁵Cs/¹²⁷Cs/¹²⁶Ba/¹²⁷Ba, E=105 MeV; measured Eγ, Iγ, yields and forward recoil range distributions (FRRDs) of reaction residues using recoil catcher activation technique at IUAC-New Delhi accelerator facility; complete and incomplete fusion cross sections, breakup of ¹⁶O into ⁴He+¹²C and/or ⁸Be+⁸Be. Comparison with predictions of theoretical model code PACE4.

doi: 10.1103/PhysRevC.89.054614
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2013KU08      Phys.Rev. C 87, 044608 (2013)

K.Kumar, T.Ahmad, S.Ali, I.A.Rizvi, A.Agarwal, R.Kumar, K.S.Golda, A.K.Chaubey

Low-energy incomplete fusion and its sensitivity to projectile structure

NUCLEAR REACTIONS ¹⁶⁵Ho(¹⁶O, X)¹⁶⁶Tm/¹⁷³Ta/¹⁷⁴Ta/¹⁷⁵Ta/¹⁷⁶Ta/¹⁷⁵W/¹⁷⁶W/¹⁷⁷W/¹⁷⁵Re/¹⁷⁶Re/¹⁷⁷Re/¹⁷⁸Re, E=73-105 MeV; measured Eγ, Iγ, σ(E) for complete fusion by activation method at IUAC facility in New Delhi; deduced ICF fraction. ¹⁶⁵Ho(¹²C, X), E=88-165; ¹⁶⁵Ho(²⁰Ne, X), E=55-80 MeV; analyzed ICF fraction. Comparison with previous experimental studies, and with PACE4 statistical model calculations.

doi: 10.1103/PhysRevC.87.044608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6225.

2013KU21      Phys.Rev. C 88, 064613 (2013)

K.Kumar, T.Ahmad, S.Ali, I.A.Rizvi, A.Agarwal, R.Kumar, A.K.Chaubey

Influence of projectile breakup on the ¹⁶O + ¹¹⁵In reaction at energies ≈ 4-7 MeV/nucleon

NUCLEAR REACTIONS ¹¹⁵In(¹⁶O, np)¹²⁹Ba, (¹⁶O, np)^129mBa, (¹⁶O, 2np)¹²⁸Ba, (¹⁶O, 3np)¹²⁷Ba, (¹⁶O, 4np)¹²⁶Ba, (¹⁶O, α)¹²⁷Cs, (¹⁶O, 2nα)¹²⁵Cs, (¹⁶O, npα)¹²⁵Xe, (¹⁶O, 3npα)¹²³Xe, (¹⁶O, 4npα)¹²²Xe, (¹⁶O, 5npα)¹²¹Xe, (¹⁶O, 2n2α)¹²¹I, (¹⁶O, 3n2α)¹²⁰I, (¹⁶O, 3n2α)^120mI, (¹⁶O, 4n2α)¹¹⁹I, (¹⁶O, n3α)^118mSb, (¹⁶O, 2n3α)¹¹⁷Sb, (¹⁶O, 3n3α)^116mSb, E=60-110 MeV; measured Eγ, Iγ, production σ(E) for reaction products at IUAC-New Delhi accelerator facility; deduced σ(E) for total fusion, complete fusion (CF), incomplete fusion (ICF), percentage ICF fraction. Natural In target. Activation method. Comparison with PACE4 calculations, and with previous experimental results for other reactions. Discussed projectile breakup processes and incomplete fusion (ICF) contribution.

doi: 10.1103/PhysRevC.88.064613
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6231.

2011AH02      Int.J.Mod.Phys. E20, 645 (2011)

T.Ahmad, I.A.Rizvi, A.Agarwal, R.Kumar, K.S.Golda, A.K.Chaubey

Reaction mechanisms in ¹²C+⁹³Nb system: excitation functions and recoil range distributions below 7 MeV/u

NUCLEAR REACTIONS ⁹³Nb(¹²C, X)¹⁰¹Ag/¹⁰²Ag/¹⁰³Ag/⁹⁹Pd/¹⁰⁰Pd/¹⁰¹Pd/¹⁰⁰Rh/¹⁰¹Rh/⁹⁷Ru/⁹⁴Tc/⁹⁵Tc/⁹⁶Tc/⁹³Mo/⁹²Nb, E=47-75 MeV; measured evaporation residue products, Eγ, Iγ; deduced significant enhancement of σ due to incomplete fusion. Comparison with PACE-2 calculations.

doi: 10.1142/S0218301311018137
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6177.

2006LI54      Acta Phys.Pol. B37, 2695 (2006)

F-H.Liu, N.N.Abd Allah, B.K.Singh, T.Ahmad

Angular distributions of target fragments in ⁸⁴Kr-Em and ¹⁶O-Em collisions at high energies

NUCLEAR REACTIONS Ag, Br(⁸⁴Kr, X), E=1.7 GeV/nucleon; Ag, Br(¹⁶O, X), E=3.7, 60 GeV/nucleon; calculated fragments angular and multiplicity distributions.

1994AH02      Nuovo Cim. 107A, 683 (1994)

T.Ahmad, M.A.Nasr, M.Irfan, H.Khushnood

Peripheral Collisions Caused by 4.5 GeV/c Carbon and Silicon Nuclei

doi: 10.1007/BF02732077
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1994NA28      J.Phys.Soc.Jpn. 63, 2936 (1994)

M.A.Nasr, T.Ahmad, M.Irfan

Characteristics of Relativistic Particles Produced in 4.5 GeV/c Silicon-Emulsion Interactions