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Search: Author = A.Shamlath

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2023SH11      Phys.Rev. C 107, 054619 (2023)

M.Shareef, E.Prasad, A.Jhingan, N.Saneesh, S.Pal, A.M.Vinodkumar, K.S.Golda, M.Kumar, A.Shamlath, P.V.Laveen, A.C.Visakh, M.M.Hosamani, S.K.Duggi, P.S.Devi, G.N.Jyothi, A.Tejaswi, A.Chatterjee, P.Sugathan

Neutron multiplicity measurement and investigation of nuclear dissipation and shell effects in 30Si + 182, 184, 186W reactions

NUCLEAR REACTIONS 182W(30Si, X)212Ra, 184W(30Si, X)214Ra, 186W(30Si, X)216Ra, E=138.8-191.9 MeV; measured reaction products, fission fragments, neutron time-of-flight, En, In, angular distribution, (fragment)n-coin; deduced neutron multiplicity spectra, prescission (from compound nucleus) and postscission (from fission fragments) contributions to neutron multiplicity, neutron angular distribution. Comparison to statistical model calculations performed with code VECSTAT incorporating dynamical hindrance in nuclear fission due to dissipation, shell corrections in the fission barrier and level density, and collective enhancement of level density (CELD). National Array of Neutron Detectors (NAND) consisting of 50 organic liquid scintillator detectors (BC 501A) coupled to the pair of position-sensitive multiwire proportional counters (MWPCs) at 15 UD Pelletron+Superconducting Linear Accelerator facility of the Inter-University Accelerator Centre (IUAC, New Delhi).

doi: 10.1103/PhysRevC.107.054619
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2021VI08      Phys.Rev. C 104, 054602 (2021)

A.C.Visakh, E.Prasad, P.V.Laveen, M.Shareef, A.Shamlath, S.Nath, N.Madhavan, J.Gehlot, Gonika, R.Biswas, A.Parihari, J.Khuyagbaatar, B.Lommel, B.Kindler, A.M.Vinodkumar, B.R.S.Babu, S.Sanila, K.M.Varier, S.Appannababu

Fusion studies in 16O + 142, 150Nd reactions at energies near the Coulomb barrier

NUCLEAR REACTIONS 142Nd(16O, X), E=60-104 MeV; 150Nd(16O, X), E=56-104 MeV from the 15-UD Pelletron accelerator at IUAC-New Delhi; measured reaction products using the Heavy Ion Reaction Analyzer (HIRA), with electromagnetic configuration of Q1Q2-ED1-M-MD-ED2-Q3Q4 and two silicon surface barrier detectors (SSBDs), evaporation residues (ERs) using position sensitive multiwire proportional counter (MWPC), two-dimensional ΔE versus ToF spectra, σ(E) for ERs; deduced fusion σ(E). 148Nd(18O, X), 142,144,148Nd(16O, X), E-VB=-10-35 MeV analyzed previous and present experimental measurements for reduced fusion σ(E). Comparison with coupled channels calculations using CCFULL code, and with 1D-BPM predictions using Akyuz-Winther (AW) potential parameters.

doi: 10.1103/PhysRevC.104.054602
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6412.


2020HO02      Phys.Rev. C 101, 014616 (2020)

M.M.Hosamani, N.M.Badiger, N.Madhavan, I.Mazumdar, S.Nath, J.Gehlot, A.K.Sinha, S.M.Patel, P.B.Chavan, T.Varughese, Vi.Srivastava, M.M.Shaikh, P.S.Devi, P.V.Laveen, A.Shamlath, M.Shareef, S.K.Duggi, P.V.Madhusudhana Rao, G.N.Jyothi, A.Tejaswi, P.N.Patil, A.Vinayak, K.K.Rajesh, A.Yadav, A.Parihari, R.Biswas, M.Dhibar, D.P.Kaur, M.Ratna Raju, J.Joseph

Evaporation-residue-gated spin distribution measurements of the highly fissile compound nucleus 224Th* through 16O + 208Pb and 18O + 206Pb reactions

NUCLEAR REACTIONS 208Pb(16O, X)224Th*, E=87, 93.2, 99.3, 105.5, 113.5, 122.6 MeV pulsed beam; 206Pb(18O, X)224Th*, E=85.7, 91.9, 100, 104.1, 108.2, 112.2, 117.4, 121.4 MeV pulsed beam; measured evaporation residues (ER), σ(E) and spin distributions of ERs from deexciting 224Th compound nucleus using the HYbrid Recoil mass Analyzer (HYRA) coupled with the TIFR 4π spin spectrometer of of 32 NaI(Tl) scintillation detectors at the IUAC-New Delhi accelerator facility; deduced experimental and simulated fold distributions, reduced ER σ(E), experimental absolute ER σ(E), including results of previous experiments.

doi: 10.1103/PhysRevC.101.014616
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6377.


2020JI03      Phys.Rev. C 101, 024611 (2020)

P.Jisha, A.M.Vinodkumar, B.R.S.Babu, S.Nath, N.Madhavan, J.Gehlot, A.Jhingan, T.Banerjee, Ish Mukul, R.Dubey, N.Saneesh, K.M.Varier, E.Prasad, A.Shamlath, P.V.Laveen, M.Shareef

Evaporation residue measurements of compound nuclei in the A ≈ 200 region

NUCLEAR REACTIONS 181Ta(16O, X), (18O, X), E=68-110 MeV; measured reaction products, time-of-flight and E-ΔE, evaporation residue σ(E). Comparison with coupled-channel (CC) calculations using CCFULL code. 181Ta(16O, X), (18O, X), E(cm)=60-120 MeV; 180Hf(19F, X), E(cm)=70-115 MeV; analyzed present and previous experimental σ(E) data using the HIVAP code. 181Ta(12C, X), (13C, X), (16O, X), (18O, X), 174,176Yb, 181Ta, 182,184W(16O, X), E(cm)/VB=0.9-1.5; analyzed experimental data in literature for reduced cross sections of evaporation residues. 204,206,208Pb(12C, X), 180Hf, 181Ta, 197Au, 194,198Pt(19F, X), 181Ta, 188,192Os, 197Au(18O, X), 181Ta, 184,186W, 188,192Os, 197Au(16O, X), E not given; analyzed experimental data in literature for charge products ZpZt and neutron numbers of compound nuclei, fission barriers scaling factors, ratio of mass asymmetry values, and fusion probabilities.

doi: 10.1103/PhysRevC.101.024611
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6379.


2020LA12      Phys.Rev. C 102, 034613 (2020)

P.V.Laveen, E.Prasad, N.Madhavan, A.K.Nasirov, J.Gehlot, S.Nath, G.Mandaglio, G.Giardina, A.M.Vinodkumar, M.Shareef, A.Shamlath, S.K.Duggi, P.Sandya Devi, T.Banerjee, M.M.Hosamani, Khushboo, P.Jisha, N.Kumar, P.Sharma, T.Varughese

Fusion studies in 35, 37Cl + 181Ta reactions via evaporation residue cross section measurements

NUCLEAR REACTIONS 181Ta(35Cl, X), (37Cl, X), E=169.7-236.6 MeV; measured evaporation residues (ERs) using HYbrid Recoil mass Analyzer (HYRA) and position sensitive multiwire proportional counter (MWPC) at the 15-UD Pelletron and superconducting linear accelerator (sc-LINAC) facility of IUAC-New Delhi; deduced σ(E), partial capture, fusion, fast fission and quasifission and total ER cross sections; calculated potential energy surface (PES) of populating 216Th compound nucleus as a function of the distance between the interacting nuclei and charge numbers (Z) of the fragments. Comparison with dinuclear system (DNS) model and statistical model calculations.

doi: 10.1103/PhysRevC.102.034613
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6392.


2019GE02      Phys.Rev. C 99, 034615 (2019)

J.Gehlot, A.M.Vinodkumar, N.Madhavan, S.Nath, A.Jhingan, T.Varughese, T.Banerjee, A.Shamlath, P.V.Laveen, M.Shareef, P.Jisha, P.Sandya Devi, G.N.Jyothi, M.M.Hosamani, I.Mazumdar, V.I.Chepigin, M.L.Chelnokov, A.V.Yeremin, A.K.Sinha, B.R.S.Babu

Evaporation residue cross-section measurements for 16O+203, 205Tl

NUCLEAR REACTIONS 203,205Tl(16O, X), E=82-113 MeV; measured reaction products, time of flight, σ(E) of evaporation residues (ERs), and individual exit channel σ(E) using gas-filled HYbrid Recoil Analyzer (HYRA) for separation of ERs, two silicon detectors and a multiwire proportional counter (MWPC) to detect the ERs at the 15 UD Pelletron accelerator facility of IUAC, New Delhi; simulated ER angular distributions using the code PACE4. 209Bi(12C, X), E(cm)=50-115 MeV; 208Pb(12C, X), (16O, X), (19F, X); 203,205Tl(16O, X), E=82-113 MeV; 204Pb(16O, X); 209Bi(12C, X); comparison of the present and previously measured reduced σ(E) with statistical model calculations using HIVAP code.

doi: 10.1103/PhysRevC.99.034615
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6363.


2019GE03      Phys.Rev. C 99, 061601 (2019)

J.Gehlot, S.Nath, T.Banerjee, Is.Mukul, R.Dubey, A.Shamlath, P.V.Laveen, M.Shareef, Md.M.Shaikh, A.Jhingan, N.Madhavan, T.Rajbongshi, P.Jisha, S.Pal

Search for stabilizing effects of the Z=82 shell closure against fission

NUCLEAR REACTIONS 180Hf(19F, X)199Tl*,181Ta(19F, X)200Pb*,182W(19F, X)201Bi*, E=4.2-6.3 MeV/nucleon; measured charged-particle spectra, time-of-flight (TOF), ΔE versus TOF plots, evaporation residue (ER) σ(E) using the Heavy Ion Reaction Analyzer (HIRA) at IUAC-New Delhi accelerator facility; calculated capture σ(E) and ER σ(E) using coupled-channels formalism and statistical model, respectively. Comparison between measurements and calculations; deduced no enhanced stabilizing effects of the Z=82 shell closure against fission in the compound nucleus.

doi: 10.1103/PhysRevC.99.061601
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6365.


2019RA30      Phys.Rev. C 100, 044611 (2019)

K.K.Rajesh, M.M.Musthafa, N.Madhavan, S.Nath, J.Gehlot, J.Sadhukhan, P.Mohamed Aslam, P.T.Muhammed shan, E.Prasad, M.M.Hosamani, T.Varughese, A.Yadav, V.R.Sharma, V.Srivastava, Md.M.Shaikh, M.Shareef, A.Shamlath, P.V.Laveen

Measurement of fusion evaporation residue cross sections in the 48Ti 138Ba reaction

NUCLEAR REACTIONS 138Ba(48Ti, X)186Pt*, E=189.3, 195.5, 201.7, 208.9, 215.7, 224.0, 234.4 MeV; measured evaporation residues (ERs), angular distributions and total σ(E) for ERs using hybrid recoil mass analyzer (HYRA) at the Pelletron+LINAC facility of IUAC-New Delhi; deduced evidence of entrance channel effect with increasing values of charge product, and no profound effect of target shell closure. Comparison of data from this experiment and for previous 154Sm(32S, X) reaction to dynamical model calculations with one-dimensional Langevin equations using CCFULL code.

doi: 10.1103/PhysRevC.100.044611
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6373.


2019SH10      Phys.Rev. C 99, 024618 (2019)

M.Shareef, E.Prasad, A.Jhingan, N.Saneesh, K.S.Golda, A.M.Vinodkumar, M.Kumar, A.Shamlath, P.V.Laveen, A.C.Visakh, M.M.Hosamani, S.K.Duggi, P.Sandya Devi, G.N.Jyothi, A.Tejaswi, P.N.Patil, J.Sadhukhan, P.Sugathan, A.Chatterjee, S.Pal

Nuclear dissipation at high excitation energy and angular momenta in reaction forming 227Np

NUCLEAR REACTIONS 197Au(30Si, X)227Np*, E=152.3, 159.4, 166.4, 173.4, 179.4, 186.4, 192.4 MeV or E*=44-79 MeV; measured reaction products, time correlation spectra of complementary fragments, E(n), I(n), double differential neutron multiplicity spectra, neutron angular distributions, fragment and neutron time of flight using the National Array of Neutron Detector (NAND) array for neutron detection and two multiwire proportional counters for fragment detection at the 15 UD Pelletron accelerator facility of IUAC-New Delhi; deduced neutron multiplicity, pre-, post-and total scission neutron multiplicity and temperature, and total neutron multiplicity. Comparison with statistical model calculations.

doi: 10.1103/PhysRevC.99.024618
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2018SH28      J.Phys.(London) G45, 095103 (2018)

M.M.Shaikh, S.Nath, J.Gehlot, T.Banerjee, I.Mukul, R.Dubey, A.Shamlath, P.V.Laveen, M.Shareef, A.Jhingan, N.Madhavan, T.Rajbongshi, P.Jisha, G.N.Jyothi, A.Tejaswi, R.N.Sahoo, A.Rani

Investigation of fusion hindrance in a soft asymmetric system deep below the barrier

NUCLEAR REACTIONS 181Ta(19F, X), E=73.7, 85.7 MeV; measured reaction products, TOF; deduced σ. Comparison with theoretical calculations.

doi: 10.1088/1361-6471/aad5c7
Citations: PlumX Metrics


2017BA19      Phys.Rev. C 96, 014618 (2017)

T.Banerjee, S.Nath, A.Jhingan, N.Saneesh, M.Kumar, A.Yadav, G.Kaur, R.Dubey, M.Shareef, P.V.Laveen, A.Shamlath, M.M.Shaikh, S.Biswas, J.Gehlot, K.S.Golda, P.Sugathan, S.Pal

Effect of collective enhancement in level density in the fission of pre-actinides

NUCLEAR REACTIONS 182W, 187Re, 193Ir(19F, F)201Bi*/206Po*/212Rn*, E=82-120 MeV from 15UD Pelletron accelerator of IUAC, New Delhi]; measured fission fragments using nine hybrid (E-ΔE) telescope, capture and fission σ(E), angular distributions of fission fragments; deduced presence of dynamical effects in the exit channel based on comparison of experimental data with predictions of a statistical model which includes the effects of shell, orientation degree of freedom, and collective enhancement in level density (CELD). 192Os, 194Pt, 197Au(19F, F)211At*/213Fr*/216Ra*, E(cm)=70-150 MeV; analyzed previous experimental data to extract capture and fission σ(E).

doi: 10.1103/PhysRevC.96.014618
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2017SH06      Phys.Rev. C 95, 034610 (2017)

A.Shamlath, E.Prasad, N.Madhavan, P.V.Laveen, J.Gehlot, A.K.Nasirov, G.Giardina, G.Mandaglio, S.Nath, T.Banerjee, A.M.Vinodkumar, M.Shareef, A.Jhingan, T.Varughese, D.Kumar, P.Sandya Devi, Khushboo, P.Jisha, N.Kumar, M.M.Hosamani, S.Kailas

Fusion and quasifission studies in reactions forming Rn via evaporation residue measurements

NUCLEAR REACTIONS 180Hf(28Si, X)208Rn*, E=130.6, 135.0, 143.9, 149.4, 154.9, 164.2, 171.9, 193.7 MeV; 180Hf(30Si, X)210Rn*, E=130.6, 135.2, 139.6, 144.0, 149.5, 156.3, 160.7, 164.3, 171.8 MeV; measured evaporation residues (ERs) ERs, ΔE vs TOF plots, ER σ(Ε) using the Hybrid Recoil Mass Analyzer (HYRA) at the 15 UD Pelletron accelerator of IUAC-New Delhi. Comparison with theoretical cross sections, using dinuclear system and statistical models, and with the results of 194Pt(16O, X)210Rn* and 160Gd(50Ti, X)210Rn* compound nuclear reactions.

doi: 10.1103/PhysRevC.95.034610
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6318.


2017SH33      Phys.Rev. C 96, 034613 (2017)

P.Sharma, B.R.Behera, R.Mahajan, M.Thakur, G.Kaur, K.Kapoor, K.Rani, N.Madhavan, S.Nath, J.Gehlot, R.Dubey, I.Mazumdar, S.M.Patel, M.Dhibar, M.M.Hosamani, Khushboo, N.Kumar, A.Shamlath, G.Mohanto, S.Pal

Evaporation residue cross-section measurements for 48Ti-induced reactions

NUCLEAR REACTIONS 142Nd(48Ti, X), E(cm)=140.43-202.01 MeV; 150Nd, (48Ti, X), E(cm)=142.18-204.61 MeV; 144Sm(48Ti, X), E(cm)=140.83-202.63 MeV; measured yield of evaporation residues (ERs) from two-dimensional time-of-flight and energy loss spectra, and σ(ER) using gas-filled mode of hybrid recoil mass analyzer (HYRA) at 15UD Pelletron+LINAC accelerator facility of IUAC-New Delhi. Comparison with statistical model calculations, using coupled-channel code CCFULL to obtain spin distribution of the compound nucleus.

doi: 10.1103/PhysRevC.96.034613
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6320.


2016BA55      Phys.Rev. C 94, 044607 (2016)

T.Banerjee, S.Nath, A.Jhingan, G.Kaur, R.Dubey, A.Yadav, P.V.Laveen, A.Shamlath, M.Shareef, J.Gehlot, N.Saneesh, E.Prasad, P.Sugathan, S.Pal

Fission fragment angular distributions in pre-actinide nuclei

NUCLEAR REACTIONS 169Tm(28Si, X)197Bi*, E=113.4, 117.9.123.4; 176Yb(28Si, X)204Po*, E=111.5, 116.2.118.4, 124.3; 175Lu(28Si, X)203At*, E=114.3, 118.8, 124.3; 180Hf(28Si, X)208Rn*, E=116.6, 121.3, 126.5; 181Ta(28Si, X)209Fr*, E=116.6, 121.4, 126.6; 182W(28Si, X)210Ra*, E=116.9, 121.6, 126.8; measured reaction products, fission product angular distributions, fission σ(E) using nine hybrid telescope detectors at IUAC-New Delhi accelerator facility. Comparison with theoretical cross sections from VECSTAT and PACE3 predictions.

doi: 10.1103/PhysRevC.94.044607
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6277.


2016RA19      Phys.Rev. C 93, 054622 (2016)

T.Rajbongshi, K.Kalita, S.Nath, J.Gehlot, T.Banerjee, I.Mukul, R.Dubey, N.Madhavan, C.J.Lin, A.Shamlath, P.V.Laveen, M.Shareef, N.Kumar, P.Jisha, P.Sharma

Deformation effects on sub-barrier fusion cross sections in 16O + 174, 176Yb

NUCLEAR REACTIONS 174,176Yb(16O, X), E=64.6-103.6 MeV; measured evaporation residues (ER), scatter plots between ΔE and TOF of the events, fusion σ(E) using HIRA recoil mass spectrometer at IUAC-New Delhi; deduced barrier distribution, hexadecapole deformation parameter (β4). Comparison with coupled-Channel calculations using CCFULL code.

doi: 10.1103/PhysRevC.93.054622
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6275.


2016SH01      Nucl.Phys. A945, 67 (2016)

A.Shamlath, M.Shareef, E.Prasad, P.Sugathan, R.G.Thomas, A.Jhingan, S.Appannababu, A.K.Nasirov, A.M.Vinodkumar, K.M.Varier, C.Yadav, B.R.S.Babu, S.Nath, G.Mohanto, Ish Mukul, D.Singh, S.Kailas

Fission fragment mass distribution studies in 30Si + 180Hf reaction

NUCLEAR REACTIONS 180Hf(30Si, F), E=128-148 MeV;194Pt(16O, F), E not given; measured fission fragments using two large area position-sensitive MWPCs; deduced fragment mass distribution; calculated fragment mass distribution, potential energy surface using CCFULL code, ratio quasifission σ to capture σ using DNS (Double Nuclear System) model.

doi: 10.1016/j.nuclphysa.2015.09.011
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