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NSR database version of April 26, 2024.

Search: Author = P.V.Laveen

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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, 186}W 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, 150}Nd 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-V_B=-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)/V_B=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 Z_pZ_t 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, 37}Cl + 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
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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, 205}Tl

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
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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.

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, 176}Yb

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

2015LA18      J.Phys.(London) G42, 095105 (2015)

P.V.Laveen, E.Prasad, N.Madhavan, S.Pal, J.Sadhukhan, S.Nath, J.Gehlot, A.Jhingan, K.M.Varier, R.G.Thomas

Fusion measurements for the ¹⁸O + ¹⁹⁴Pt reaction and search for neutron shell closure effects

NUCLEAR REACTIONS ¹⁹⁴Pt(¹⁸O, X)²¹²Rn, E=77.7-105.3 MeV; measured reaction products, fission fragments; deduced evaporation residue σ, fission fragments σ(θ). Comparison with statistical model analysis of the evaporation residue data employing shell-corrected free energy fission barrier height.

doi: 10.1088/0954-3899/42/9/095105
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD6261.