Browsing by Author "A. Jhingan"

Now showing 1 - 20 of 20

Asymmetric fission around lead: The case of Po 198
(American Physical Society, 2019) Shilpi Gupta; C. Schmitt; K. Mahata; A. Shrivastava; P. Sugathan; A. Jhingan; K.S. Golda; N. Saneesh; M. Kumar; G. Kaur; L. Stuttgé; D. Arora; H. Arora; A. Chatterjee; K. Chauhan; S.K. Duggi; D.P. Kaur; V. Mishra; Prashant N. Patil; K. Rani
Asymmetric low-energy fission of neutron-deficient nuclei around lead is addressed with the measurement of fragment mass and total kinetic energy properties for the fissioning system Po198 produced in heavy-ion fusion. Interpretation of the measurement for such a transitional nucleus at finite excitation energy is challenging. The presence of asymmetric partitions is suggested by the observed weak dependence of the total kinetic energy on mass and by the nonmonotonic evolution of the fragment-mass distribution width with excitation energy. The interpretation is supported by microscopic model calculations as well as by the results of an advanced semiempirical code. Combined with previous experiments in the region, the present measurement contributes to establish the evolution of the fragment-mass distribution as a function of the fissioning system. The connection between the "new" and the "old" islands of asymmetric fission is discussed. © 2019 American Physical Society.
Experimental study of the transfer-induced fission fragment angular distribution in the Li 6 + U 238 reaction
(American Physical Society, 2017) A. Parihari; G. Mohanto; Gurpreet Kaur; A. Jhingan; K. Mahata; R.G. Thomas; P.C. Rout; E.T. Mirgule; V.V. Desai; B. Srinivasan; C. Joshi; V. Mishra; M. Kushwaha; Shilpi Gupta; D. Sarkar; S.V. Suryanarayana; A. Shrivastava; N.L. Singh; A. Misra; B.K. Nayak; A. Saxena
Transfer-induced fission fragment angular distribution measurements have been carried out in Li6+U238 reaction at beam energies of 36 and 40 MeV in coincidence with projectile-like fragments. The fission fragment anisotropies for α- and deuteron-transfer-induced fission reactions are obtained with respect to the recoil direction. The anisotropy values for transfer-induced fissions are observed to be either similar or lower than the inclusive measurement. In order to quantitatively understand the present experimental data on transfer-induced fission, anisotropy values have been compared with the preequilibrium fission model considering ground-state spin of the projectile and/or target. It is found that the model predicts the inclusive and exclusive anisotropy data reasonably well. © 2017 American Physical Society.
Fission dynamics and entrance-channel study in the Po 210 compound nucleus via light-particle multiplicities
(American Physical Society, 2023) Chetan Sharma; B.R. Behera; Shruti; Amit; Bharti Rohila; Amninderjeet Kaur; Subodh; Neha Dhanda; Ashok Kumar; P. Sugathan; A. Jhingan; K.S. Golda; N. Saneesh; Mohit Kumar; H. Arora; Divya Arora; H.P. Sharma
Neutron multiplicities, folding angle distribution, mass distribution, and mass-energy distribution are measured for the compound nucleus Po210 populated through the C12+Pt198 reaction at an excitation energy of 61.6 MeV. The measured neutron multiplicities are compared with the statistical model code joanne2 to extract total fission time for the Po210 compound nucleus. The total fission time (τtot) obtained for this system is (10±5)×10-21 s at 49 MeV and increases to (23±5)×10-21 at 61.8 MeV excitation energy indicating that dissipation increases with excitation energy. A comparison with τtot of the O18+Os192 reaction populating the same compound nucleus indicates the influence of entrance channel mass asymmetry on the fission time. Dynamical model calculations have been performed to understand the fusion dynamics for these reactions and it is observed that the formation time of the compound nucleus increases as we go from the asymmetric to the symmetric entrance channels. Also, these calculations predict that 93% of the total angular momentum lead to the formation of a fully equilibrated compound nucleus for the C12+Pt198 reaction whereas this percentage decreases to 84%, for the O18+Os192 reaction indicating a higher percentage of noncompound nuclear processes in the latter case. © 2023 American Physical Society.
Fission time scale from pre-scission neutron and α multiplicities in the O 16 + Pt 194 reaction
(American Physical Society, 2017) K. Kapoor; S. Verma; P. Sharma; R. Mahajan; N. Kaur; G. Kaur; B.R. Behera; K.P. Singh; A. Kumar; H. Singh; R. Dubey; N. Saneesh; A. Jhingan; P. Sugathan; G. Mohanto; B.K. Nayak; A. Saxena; H.P. Sharma; S.K. Chamoli; I. Mukul; V. Singh
Pre- and post-scission α-particle multiplicities have been measured for the reaction O16+Pt194 at 98.4 MeV forming Rn210 compound nucleus. α particles were measured at various angles in coincidence with the fission fragments. Moving source technique was used to extract the pre- and post-scission contributions to the particle multiplicity. Study of the fission mechanism using the different probes are helpful in understanding the detailed reaction dynamics. The neutron multiplicities for this reaction have been reported earlier. The multiplicities of neutrons and α particles were reproduced using standard statistical model code joanne2 by varying the transient (τtr) and saddle to scission (τssc) times. This code includes deformation dependent-particle transmission coefficients, binding energies and level densities. Fission time scales of the order of 50-65 ×10-21 s are required to reproduce the neutron and α-particle multiplicities. © 2017 American Physical Society.
High-spin states in the odd-odd nucleus146Tb
(American Physical Society, 2004) Krishichayan; A. Chakraborty; S.S. Ghugre; R. Goswami; S. Mukhopadhyay; N.S. Pattabiraman; S. Ray; A.K. Sinha; S. Sarkar; P.V. Madhusudhana Rao; U. Garg; S.K. Basu; B.K. Yogi; L. Chaturvedi; A. Dhal; R.K. Sinha; M. Saha Sarkar; S. Saha; R. Singh; R.K. Bhowmik; A. Jhingan; N. Madhavan; S. Muralithar; S. Nath; R.P. Singh; P. Sugathan
The odd-odd 146Tb nucleus has been investigated using the 115In(34S,3n) reaction at 140 MeV incident energy using an array of eight Compton-suppressed Clover detectors. Based on the observed γ- γ coincidences, the level structure of 146Tb has been extended up to Ex∼ 10 MeV. Linear polarization measurements have been combined with angular correlations of the observed γ rays to assign the electromagnetic nature to the transitions. Probable origin of a cascade of M1 transitions observed around 8 MeV excitation energy has been discussed.
Indian National Gamma Array at Inter University Accelerator Centre, New Delhi
(2010) S. Muralithar; K. Rani; R. Kumar; R.P. Singh; J.J. Das; J. Gehlot; K.S. Golda; A. Jhingan; N. Madhavan; S. Nath; P. Sugathan; T. Varughese; M. Archunan; P. Barua; A. Gupta; M. Jain; A. Kothari; B.P.A. Kumar; A.J. Malyadri; U.G. Naik; Raj Kumar; Rajesh Kumar; J. Zacharias; S. Rao; S.K. Saini; S.K. Suman; M. Kumar; E.T. Subramaniam; S. Venkataramanan; A. Dhal; G. Jnaneswari; D. Negi; M.K. Raju; T. Trivedi; R.K. Bhowmik
A 4π multi-detector gamma-ray spectrometer named the Indian National Gamma Array (INGA) has been set up at the Inter University Accelerator Centre, New Delhi, for nuclear structure studies. The array is designed to incorporate twenty four Compton-suppressed Clover germanium detectors with a total photopeak efficiency ∼5%. The spectrometer along with sub-systems developed in-house like, mechanical support structure, high voltage power supplies, automatic liquid nitrogen filling system, front-end electronics and data acquisition system are described. The mechanical support structure facilitates the use of the Clover Germanium array with a recoil mass separator. The array has been used in a number of nuclear spectroscopic investigations. The in-beam and off-beam performance of the array are reported. © 2010 Elsevier B.V.
Indian National Gamma Array at IUAC
(Institute of Physics Publishing, 2011) S. Muralithar; K. Rani; R.P. Singh; R. Kumar; J.J. Das; J. Gehlot; K.S. Golda; A. Jhingan; N. Madhavan; S. Nath; P. Sugathan; T. Varughese; M. Archunan; P. Barua; A. Gupta; M. Jain; A. Kothari; B.P.A. Kumar; A.J. Malyadri; U.G. Naik; Raj Kumar; Rajesh Kumar; J. Zacharias; S. Rao; S.K. Saini; S.K. Suman; M. Kumar; E.T. Subramaniam; S. Venkataramanan; A. Dhal; G. Jnaneswari; D. Negi; M.K. Raju; T. Trivedi; R.K. Bhowmik
Indian National Gamma Array (INGA) is a 4π multi-detector gamma-ray spectrometer based on twenty four Compton-suppressed Clover Germanium detectors with a total photo peak efficiency ∼ 5 %. INGA was designed to perform high resolution gamma-ray spectroscopy to study nuclear structure at high spins with stable ion beams at Inter University Accelerator Centre (IUAC). Description of the facility and performance of the array are presented in this paper. Since its commissioning, a number of nuclear spectroscopic investigations have been carried out using the array.
Inference on fission timescale from neutron multiplicity measurement in 18O + 184W
(IOP Publishing Ltd, 2022) N.K. Rai; A. Gandhi; M T Senthil Kannan; S.K. Roy; N. Saneesh; M. Kumar; G. Kaur; D. Arora; K.S. Golda; A. Jhingan; P. Sugathan; T.K. Ghosh; Jhilam Sadhukhan; B.K. Nayak; Nabendu K Deb; Saumyajit Biswas; A. Chakraborty; A. Parihari; Ajay Kumar
The pre-scission and post-scission neutron multiplicities are measured for the 18O + 184W reaction in the excitation energy range of 67.23-76.37 MeV. Langevin dynamical calculations are performed to infer the energy dependence of fission decay time in compliance with the measured neutron multiplicities. Different models for nuclear dissipation are employed for this purpose. Fission process is usually expected to be faster at a higher beam energy. However, we found an enhancement in the average fission time as the incident beam energy increases. It happens because a higher excitation energy helps more neutrons to evaporate that eventually stabilizes the system against fission. The competition between fission and neutron evaporation delicately depends on the available excitation energy and it is explained here with the help of the partial fission yields contributed by the different isotopes of the primary compound nucleus. © 2022 IOP Publishing Ltd.
Investigation of an intruder band in 45 Sc via coulomb excitation ∗
(Jagellonian University, 2019) M. Matejska-Minda; R. Kumar; P.J. Napiorkowski; M. Saxena; S. Dutt; A. Agarwal; I. Ahmed; S. Bhattacharya; A. Jhingan; J. Kaur; M. Kicińska-Habior; M. Kumar; S. Kumar; D. Kumar; V. Nanal; R. Palit; N.K. Rai; M. Shuaib; A. Sood; A. Stolarz; T. Trivedi; A.K. Tyagi; R.K. Bhowmik; H.J. Wollersheim
In order to gain further information on the electromagnetic properties of the low-lying states in 45 Sc, a Coulomb excitation measurement was carried out at the IUAC, New Delhi. The 45 Sc target nuclei were Coulomb excited by the 70 MeV 32 S beam from the 15UD tandem accelerator. The γ-rays depopulating Coulomb excited states in 45 Sc were detected by four Clover detectors in coincidence with the forward scattered ions. The main aim of the experiment was to determine the B(E3; 7/2 − → 3/2 + ) and B(E3; 7/2 − → 5/2 + ) transition probabilities, as well as the transitional electromagnetic matrix elements for low-lying intruder states. © 2019 Jagellonian University. All Rights Reserved.
Lifetime measurements of microsecond isomers in the N=48 nuclei 88Zr and90Mo using recoil-isomer tagging
(American Physical Society, 2004) A. Chakraborty; Krishichayan; S.S. Ghugre; R. Goswami; S. Mukhopadhyay; N.S. Pattabiraman; S. Ray; A.K. Sinha; S. Sarkar; P.V. Madhusudhana Rao; U. Garg; S.K. Basu; L. Chaturvedi; A. Dhal; R.K. Sinha; I.M. Govil; M.B. Chatterjee; M. Saha Sarkar; R.K. Bhowmik; A. Jhingan; N. Madhavan; S. Muralithar; S. Nath; R.P. Singh; P. Sugathan
The recoil-isomer tagging technique has been used to study the isomeric states of nuclei in the vicinity of the N=50 shell closure. The nuclei of interest were separated from the projectilelike nuclei and other evaporation residues and transported to the focal plane of a recoil separator. The decay of the tagged isomer was studied at the focal plane using a high-purity Ge detector. The prompt transitions feeding the isomer were detected in an array of Clover Ge detectors placed around the target. The measured half-lives of the 8+ isomers in 88Zr and 90Mo are 1.41 (-0.09)(+0.12) μs and 1.17(-0.07) (+0.19), respectively. The corresponding transition probabilities are in reasonable agreement with the predictions of shell model calculations. The systematics of effective charges (ep and en) for N=48 nuclei are qualitatively understood in these calculations.
Measurement of neutron multiplicity to investigate the role of entrance channel parameters on the nuclear dissipation
(American Physical Society, 2019) N.K. Rai; A. Gandhi; Ajay Kumar; N. Saneesh; M. Kumar; G. Kaur; A. Parihari; D. Arora; K.S. Golda; A. Jhingan; P. Sugathan; T.K. Ghosh; Jhilam Sadhukhan; B.K. Nayak; Nabendu K. Deb; S. Biswas; A. Chakraborty
In the present work, the pre- and post-scission neutron multiplicities were measured for the reaction O18+W186 at different excitation energies populating the compound nucleus Pb204, using the National Array of Neutron Detectors (NAND) facility at IUAC, New Delhi, India. Here, we investigated the entrance channel effect on the nuclear dissipation involved in the heavy ion fusion-fission dynamics. The statistical model analysis was performed using the code vecstat. The prescribed reaction O18+W186 had similar value of the mass asymmetry as the system O16+Ta181 studied earlier, populating the compound nucleus Tl197. Specifically, we observed the similar behavior from both the systems against the nuclear dissipation, with the similar value of the mass asymmetry. The role of the entrance channel parameters on the nuclear dissipation was also discussed in the present work. © 2019 American Physical Society.
No evidence of reduced collectivity in Coulomb-excited Sn isotopes
(American Physical Society, 2017) R. Kumar; M. Saxena; P. Doornenbal; A. Jhingan; A. Banerjee; R.K. Bhowmik; S. Dutt; R. Garg; C. Joshi; V. Mishra; P.J. Napiorkowski; S. Prajapati; P.-A. Söderström; N. Kumar; H.-J. Wollersheim
In a series of Coulomb excitation experiments the first excited 2+ states in semimagic Sn112,116,118,120,122,124 isotopes were excited using a Ni58 beam at safe Coulomb energy. The B(E2; 0+→2+) values were determined with high precision (∼3%) relative to Ni58 projectile excitation. These results disagree with previously reported B(E2↑) values [A. Jungclaus, Phys. Lett. B 695, 110 (2011).PYLBAJ0370-269310.1016/j.physletb.2010.11.012] extracted from Doppler-shift attenuation lifetime measurements, whereas the reported mass dependence of B(E2↑) values is very similar to a recent Coulomb excitation study [J. M. Allmond, Phys. Rev. C 92, 041303(R) (2015)PRVCAN0556-281310.1103/PhysRevC.92.041303]. The stable Sn isotopes, key nuclei in nuclear structure, show no evidence of reduced collectivity and we, thus, reconfirm the nonsymmetric behavior of reduced transition probabilities with respect to the midshell A=116. © 2017 American Physical Society.
Quasielastic scattering measurements in the Si 28 + Nd 142,150 systems
(American Physical Society, 2020) Saumyajit Biswas; A. Chakraborty; A. Jhingan; D. Arora; B.R. Behera; Rohan Biswas; Nabendu Kumar Deb; S.S. Ghugre; Pankaj K. Giri; K.S. Golda; G. Kaur; A. Kumar; M. Kumar; B. Mukherjee; B.K. Nayak; A. Parihari; N.K. Rai; S. Rai; R. Raut; Rudra N. Sahoo; A.K. Sinha
Barrier distributions for the Si28+Nd142,150 systems were extracted from large-angle quasielastic scattering measurements. The measurements were carried out over a wide range of incident beam energies around the Coulomb barriers. The experimental results were compared with the predictions from coupled-channels calculations carried out using different coupling schemes. Reasonable agreement between the experimental and theoretical results was obtained. The role of coupling effects of the various excitation modes of the projectile and target on the observed barrier distributions is discussed. The sensitivity of the quasielastic scattering process on the mode of projectile excitation is clearly been seen from the use of two different types of targets, Nd142 and Nd150, having spherical and deformed shapes at the ground state, respectively. © 2020 American Physical Society.
Re-measurement of reduced transition probabilities in 132ba
(Jagellonian University, 2018) S. Dutta; M. Saxena; R. Kumar; A. Jhingan; A. Agarwal; A. Banerjee; R.K. Bhowmik; C. Joshi; J. Kaur; A. Kumar; M. Matejska-Minda; V. Mishra; I.A. Rizvi; A. Stolarz; H.J. Wollersheim; P.J. Napiorkowski
Reduced transition probabilities between the low-lying states of 132Ba were measured using the Coulomb excitation technique. The experiment was performed at Inter University Accelerator Center (IUAC), New Delhi using a 58Ni beam of 175 MeV energy to Coulomb excite the 132Ba nuclei. In addition to the 2+1 state, other states in 132Ba, such as 2+2 and 4+1 , were populated, the latter for the first time using Coulomb excitation. A set of matrix elements was extracted for the transitions between these levels. These values were determined relative to 134Ba excitations to minimize the systematic errors. A B(E2; 0+gs → 2+1) value of 1.088(85) e2 b2 was determined, corresponding to -54:5 single-particle units. © 2018 Jagellonian University. All rights reserved.
Revised lifetime of the 11/2- state in 45Sc via coulomb excitation
(Jagellonian University, 2020) M. Matejska-Minda; P.J. Napiorkowski; R. Kumar; M. Saxena; S. Dutt; A. Agarwal; I. Ahmed; S. Bhattacharya; A. Jhingan; J. Kaur; M. Kicińska-Habior; M. Kumar; S. Kumar; D. Kumar; V. Nanal; R. Palit; N.K. Rai; M. Shuaib; A. Sood; A. Stolarz; T. Trivedi; A.K. Tyagi; R.K. Bhowmik; H.J. Wollersheim
A Coulomb-excitation measurement to study low-energy electromagnetic properties of 45Sc has been performed at the IUAC facility in New Delhi, India using a 70 MeV 32S projectile from the 15UD tandem accelerator. The preliminary value of the reduced transition probability B(E2; 11/2- → 7/2-) and the resulting lifetime for the 11/2- state at 1237 keV were determined using the GOSIA code. © 2020 Jagellonian University. All rights reserved.
Role of viscosity in fusion-fission dynamics via simultaneously measured neutron and α -particle multiplicities
(American Physical Society, 2019) K. Kapoor; N. Bansal; Chetan Sharma; S. Verma; K. Rani; R. Mahajan; B.R. Behera; K.P. Singh; A. Kumar; H. Singh; R. Dubey; N. Saneesh; M. Kumar; A. Yadav; A. Jhingan; P. Sugathan; B.K. Nayak; A. Saxena; H.P. Sharma; S.K. Chamoli
The multiplicities of α particles and neutrons have been measured simultaneously for the reaction O16+Pt196 forming Rn212 compound nucleus at excitation energies of 56 MeV, 61 MeV, and 68 MeV. Neutrons and α particles were detected at various angles in coincidence with the fission fragments. To extract the contribution of pre- and postmultiplicities using the total α-particle and neutron spectra, moving source formalism was implemented. In the case of α particle, near scission contribution has also been extracted. Study of the fission mechanism using light particle emissions are helpful in understanding the detailed fusion-fission reaction dynamics. The statistical model code joanne2, which includes deformation-dependent particle transmission coefficients, binding energies and level densities, has been used to reproduce the measured multiplicities of neutrons and α particles by varying the transient (τtr) and saddle to scission (τssc) times. It is found that the fission time scales of the order of 50-70×10-21 sec are required to reproduce the neutron and α-particles multiplicities simultaneously. The fission time scales are the measure of the nuclear viscosity, which is responsible for the dynamic hindrance of the fission process. © 2019 American Physical Society.
Spectroscopy of Nb90 at high spin
(2005) A. Chakraborty; Krishichayan; S.S. Ghugre; R. Goswami; S. Mukhopadhyay; N.S. Pattabiraman; S. Ray; A.K. Sinha; S. Sarkar; P. V. Madhusudhana Rao; U. Garg; S.K. Basu; M.B. Chaterjee; M. Saha Sarkar; L. Chaturvedi; A. Dhal; R.K. Sinha; I.M. Govil; R.K. Bhowmik; A. Jhingan; N. Madhavan; S. Muralithar; S. Nath; R.P. Singh; P. Sugathan
Excited states of Nb90 were investigated via prompt and delayed γ decays and the recoil-isomer tagging technique. The level scheme of Nb90 has been extended up to J=19 and Ex=8.4 MeV. Half-lives of the 11- and 17/2- isomeric levels in Nb90,91 were measured to be 0.47±0.01 and 3.3±0.4 μs, respectively. The results are compared with the predictions of large-basis shell model calculations. The effects of truncation of the valence model space on the calculated results are discussed. © 2005 The American Physical Society.
Spin-parity measurements in the neutron-rich N ∼ 20 34P and 36S nuclei
(2006) Krishichayan; A. Chakraborty; S. Mukhopadhyay; S. Ray; N.S. Pattabiraman; S.S. Ghugre; R. Goswami; A.K. Sinha; S. Sarkar; U. Garg; P.V. Madhusudhana Rao; S.K. Basu; B.K. Yogi; L. Chaturvedi; A. Dhal; R.K. Sinha; M. Saha Sarkar; S. Saha; R. Singh; R.K. Bhowmik; A. Jhingan; N. Madhavan; S. Muralithar; S. Nath; R.P. Singh; P. Sugathan
Yrast and near-yrast energy levels in the neutron-rich N ∼ 20 nuclei 34P, 36S were populated using transfer/deep-inelastic processes following the 34S + 115In reaction at an incident energy of 140MeV. The use of a multi-clover array has facilitated polarization measurements of the observed γ-rays and necessitated some changes in the previously known level scheme. The observation of the negative-parity levels in these nuclei on the periphery of the "island of inversion" is indicative of the influence of the intruder orbitals on the level structure at low spins. Shell-model calculations indicate that the inclusion of the orbitals from the upper pf shell is important even for the low-lying positive-parity states.
STRUCTURE OF LOW-SPIN STATES IN45Sc STUDIED VIA COULOMB EXCITATION
(Jagiellonian University, 2024) M. Matejska-Minda; P.J. Napiorkowski; K. Sieja; P. Bednarczyk; T. Abraham; A. Agarwal; I. Ahmed; S. Bhattacharya; R.K. Bhowmik; D.T. Doherty; S. Dutt; K. Hadyńska-Klęk; J. Iwanicki; A. Jhingan; J. Kaur; M. Kicińska-Habior; M. Kisieliński; M. Komorowska; M. Kowalczyk; M. Kumar; R. Kumar; S. Kumar; D. Kumar; A. Maj; T. Marchlewski; P. Matuszczak; V. Nanal; A. Nannini; M. Palacz; R. Palit; L. Próchniak; N.K. Rai; M. Rocchini; M. Saxena; W. Satuła; M. Shuaib; M. Siciliano; A. Sood; J. Srebrny; A. Stolarz; J. Styczeń; T. Trivedi; A.K. Tyagi; B. Wasilewska; H.J. Wollersheim; K. Wrzosek-Lipska; M. Zielińska
The electromagnetic structure of45Sc at low excitation energy was investigated via low-energy Coulomb excitation at the Heavy Ion Laboratory (HIL) of the University of Warsaw and at the Inter-University Accelerator Centre (IUAC) in New Delhi. A set of reduced E2, E3, and M1 matrix elements was extracted from the collected data using the GOSIA code. The reduced transition probability B(E2; 11/2− → 7/2−) has been determined, allowing us to deduce the lifetime of the 11/2− state at 1237 keV. In addition, the upper limit on the reduced transition probability B(E3; 7/2− → 5/2+) has been determined for the first time. New large-scale shell-model and beyond-mean-field calculations were performed to interpret the structure of this nucleus. © 2024 Jagiellonian University. All rights reserved.
Study of nuclear fusion-fission dynamics in 16O+194Pt reaction
(American Institute of Physics Inc., 2017) K. Kapoor; S. Verma; P. Sharma; R. Mahajan; N. Kaur; G. Kaur; B.R. Behera; K.P. Singh; H. Singh; R. Dubey; N. Saneesh; A. Jhingan; P. Sugathan; G. Mohanto; B.K. Nayak; A. Saxena; H.P. Sharma; S.K. Chamoli; I. Mukul; A. Kumar
Pre- and post-scission α-particle multiplicities have been measured for the reaction 16O + 194Pt at 98.4 MeV forming compound nucleus 210Rn. The α-particle's yield has been measured in coincidence with the fission fragments at various angles. The moving source analysis was performed to extract the alpha particle multiplicity which yielded the contribution of pre- and post- scission components. The pre-scission α-particle multiplicity has been compared with JOANNE2 statistical model code predictions to extract fission time scale and which is observed to be around 55zs (1zs=10-21s). © 2017 Author(s).