VOLUME 14 B. NUCLEAR PHYSICS and REACTOR PHYSICS

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1 PROCEEDINGS OF THE NUCLEAR PHYSICS AND SOLID STATE PHYSICS SYMPOSIUM 1972 BOMBAY, FEBRUARY 1-4, 1972 VOLUME 14 B NUCLEAR PHYSICS and REACTOR PHYSICS ORGANISED BY THE PHYSICS COMMITTEE OF THE DEPARTMENT OF ATOMIC ENERGY GOVERNMENT OF INDIA

2 CONTENTS SSM. I. NUCLEAR REACTIONS Analogue States is *3C, *'f *ad 3iP- M.R. Gunye and C. S. Waxke j Studies on Analog States in 33C1 by leo spin-forbidden Resonances in the Reaction 32S(p, V ) 33C1 : M.A. Eswaran, M. Ismail and N. L, Ragoowaasi 5 A Study of the Reaction 64Ni(p, p)6%i in the Range to MeV : S.K, Gupta, S. S. Karekatte, M. K. Mehta and A. S. Divalia 7 Excitation Function for the Gamma-Ray Yield* from Alpha Particle Bombardment o *9f in the Range 3.96 to 4.55 MeV : M. Balakrishnan, M. K. Mehta and A.S. Divatia 13 Investigations of Nuclear Levels in 2^Si by means of 27a1 (p, V )28si Reaction : C. Rangacharyulu, V.G. Jadhao, G. K. Mehta and R. M. Singru 19 Spina of Low Lying Levels in 75ge : B. Lai and Baldev Sahai 27 Measurement of Nonelastic Cross Sections at 14.2 MeV : Bharati Pal, Arun Chatterjee and A. M. Ghose 33 Effect of Fragment Anisotropy on Prompt Neutron Energy and Angular Distributions : N. N. Ajitanand and S. S. Kapoor 37 Energy and Angular Distributions of Long Range Charged Particles in Thermal Fission of U23"5 : D. M. Nadkarni, S. K. Kataria, S. S. Kapoor and P. N. Rimarao 45 Studies on Highly Asymmetric Binary Fission : Fission of Uranium with Reactor Neutrons : V. K. Rao, V. K. Bhargava, S. G. Marathe, S. M. Sahakundu and R. H. Iyer 53 On 'R' Matrix and Self Nuclear Reactions : R. Swarup 61 Systematica of the Nuclear Lifetimes : K.B. Lai and G.N.Rao 66

3 A Experimental P-wave Neutron Strength Functions and the a&s Optical Model : J. Rama Rao, M. Sriramachandra Murty, K. Siddappa and A. Lakiihmana. Rao 67 A-Dependence of the Optical Model Potential ; D. C. Agrawal and P. C. Sood 73 A Calculation of the Real Part of the Optical-Model Potential: Q.N. Usrnani and I. Ahmad 81 CompJex Angular Momentum Methods for Composite Particle - Nucleus Elastic Scattering: R. K. Satpathy, D. K. Mishra and S. K. Samaddar 87 Coupled Channel Calculation for Elastic Scattering of Deuterons on 40Ca: S.N. Mukherjee 93 Angular Momentum Effects in the Elastic Scattering of loo - from Calcium Isotopes Calculation: M. K. Mehta 99 An Exact Description of (D, P) Reaction : S. K. Samaddar and Suprokash Mukherjee 107 Calculation of Isospin Centroid Energies of States Excited via Stripping Reactions : -&. Shelly and R. K. Bansal 111 Charge form Factor of He3 : H. L. Yadav, S. S. Raghavan and B.K. Srivastava 117 Detailed Analyses of the Li(p, pt)^he Reaction : A. K. Jain and N. Sarma 123 A Study of the 12C(p, 2p)uB Reaction at 75 MeV : Ashish Chatterjee and Phillip Deutchman 129 Equivalence of Two Internucleon Potentials in <T int. Calculations : B.K. Srivastava and S. S. Raghavan 133 Effect of Tensor Forces on ( V. p) Disintegration of He1*: H. L. Yadav, D. Mahanti and B. K. Srivastava 137 Analogs of Giant Resonances and Photo-Production of Positive Pions from 16q+. k, Srinivasa Rao 142 Photoproduction of Charged Pions from O in the Saxon- Woods Basis : K. Srinivasa Rao 143

4 - Total Negative Muon Capture Rate in the oc-particle : B.K. Srivastava, D. Mahanti and H. L. Yadav 149 Asymmetry of Emitted Neutrons in Muon Capture : V. Devanathan and R. Parthaaarathy 153 Recoil Nuclear Polarization in Muon Capture : V. Devanathan, R. Parthasarathy and P. R. Subramanian 157 Polarization of Emitted Neutron in Muon. Capture : V. Devanathan and R. Parthasarathy 161 Absorption of 2P Pion followed by the Emission of Two Neutrons on 12C Nucleus : B.K. Jain 165 Pion Absorption and the Structure of 6Li Nucleus : B.K. Jain 171 Allowed Range of Pion-Nucleon Coupling Constant Using OBE Type and Hamada-Johnston Type Potentials : M. Zahid 179 II. NUCLEAR THEORY Search for Superheavy Elements in Natural Materials : B. M.P. Trivedi 183 An Alternative Method to Strutinsky Prescription for Deter mining Nuclear Ground State Shell Correction : V. S. Ramamurthy, S.K. Kataria and S. S. Kapoor 189 Evidence for the Persistence of Shell Effects on the Saddle Point Deformation of 2 }T1 : V. S. Ramamurthy and S.S. Kapoor Further Calculations on the Distribution of Fragment Mass and Charge in Fisaiqfl : V. S. Ramamurthy 201 Nuclear Level Density and the Supermultiplet Model : S. Ramamurty, A. Ramanathan, G.S.N. Murty and M.V. Ramana Murty 207 A Separable Potential Model for *S0 Neutron-Proton Interaction: A. P.S, Sirohi and M.K. Srivastava 211 The Unitary Pole Expansion of the t-matrix Elements for Local Potentials with Hard-Core: V.S. Mathur, A.V. Lagu and C. Maheshwari 217

5 s. Binding Energy of 3H in the Unitary Pole Approximation using a Hard-Core Potential : C. Maheshwari, V.S. Mathur and A.V. Lagu 223 Excitation Spectrum for Nuclear Matter : K. M. Khanna and M. L. Sharma 227 The Dependence of the Sensitivity of Nuclear Matter Binding Energy to the High Energy Phase Shifts on the Range of Force: M. K. Srivastava 233 Phenomenological Models of Rotational Spectra and Classification of Nuclear Shapes : A. N. Mantri and P. C. Sood 239 ^ Alternating Energy Term for Rotational Levels of Odd-Mass Rare Earth Nuclei : P. C. Joshi and P. C. Sood 247 Ground State Spin-Parities of Odd-Odd Rare-Earth Nuclei : D. K. Gupta and P. C. Sood 255 Study of Rotations of Deformed Even-Even Nuclei : V. R. Prakash, B. M. Bahal and V.K. Deshpande 261 Truncation of Configuration Space and the Nature of Effective Two-body Interaction : Raj K. Gupta and S. P. Pandya 267 The Excited Levels of 2"Ne Using Tamm-Dancoff Approxi mation : D. R. Kulkarni and S. P. Pandya 273 Generator Coordinate Spectrum of 20Ne : S.B. Khadkikar and D. R. Kulkarni 277 Variation after Projection and Projected Hartree Method - A Comparison in a Schematic Model : S. K. Sharma and K.H. Bhatt 283 The Effect of Constancy of Basis on Transition-Probabilities in Odd-Odd Nuclei : S,D. Sharma 287 Spectra, Static Moments and Transition-Probabilities of Odd-Odd Nuclei,9Tml68 and 6?Hol64. D. Sharma 291 Cluster Model Calculations for Mg24 Nucleus : K. M. Khanna and M. L. Sharma 295 Stability of Excited States and Band Cutoff in Light 4N-Nuclei : L. Satpathy, H. Priedrich and A. Weiguny 299

6 D.K. On the Deformations Producing Tendency of the T=l Interasttar s S.K. Sharma and K.H. Bhatt *)fj5 7SAs and the Core Excitation Model : Gummadi Satyanarayaas.,, M. N. Seetaramanath and V. Lakshminarayana?.' J Systematic Tendencies in Coulomb Wave Function* q :,%" M. V. Ramana Murty, S. Ramamurty and C. R. Chaadran. Low Lying Energy Levels of Hf178, Th232 and Pa239 : M. V. Ramana Murty, S. Ramamurty and K. Parthasaradhi 3i? m. NUCLEAR SPECTROSCOPY Half-life Measurement of the kev Level in 5'Co : S.D. Chauhan, R.K. Garg, S. C. Pancholi, S. L- Gupta and N. K. Sana 323 Nuclear Level Studies of 9?Ru Gupta, C. Rangacharyulu, R. Singh and G. N. Rao 329 Structure of the Ground State of 148Pm : R.A. Amadori, J.R. Horgan, Jt. and ICS.R. Sastry 337 Nuclear Lifetime Measurements of Some Excited States in 75As, 131Cs, 133Ca, 170Yb, 187Re j^j 197Att : D.K. Gupta and G.N. Rao 343 Lifetime and Magnetic Moment of 68 kev State- in ^^Sc : D.K. Gupta, D.N. Sanwal and G.N. Rao 349 Magnetic Moment of the 3~, 1374 kev Level of 182W : Bhupender Singh,' A.K. Dhar, Vikram Singh and H.S. Hans 353 Hyperfine Magnetic Fields at As in Fe, Co and Ni : R. C. Chopra and P. N. Tandon 357 The Internal Hyperfine Fields on Arsenic in Cobalt and Nickel Hosts: A.K. Dhar, Bhupender Singh, Vikram Singh and H.S". Hana 363 Alpha-Gamma Directional Correlation in a Polycrystalliae 24lAm Source : R.K. Garg, _.D. Chauhan, S-L. Gupta and N.K. Saha 369 Directional Correlation Studies in 59Co : M.M. Bajaj, Ashok Kumar, S. K. Soni, S. C. Pancholi, S. L. Gupta and N. K- Saha 375

7 " Directional Correlation and Multipoie lajnirg a the Gamma Transitions in 99Tc. : S. S. Bhati, A.K. Bhasdwaj, Nirmal Singh, P. C. Mangai and P. N. Trehan 381 Gamma Gamma Directional Correlations in 147Pm : A.K. Bhardwaj, S.S. Bhati, Nirmal Singh, P. C. Mangai and P.N. Trehan 385 The 158 kev Level in 117Sn : R. C. Chopra, R. R. Hoaangdi and P.N. Tandon 391 Decay of Np23^ to Pu239 : K. P. Gopinathan, A. P. Agnihotry, P.N. Tandon, H. C. Jain and S.B. Patel 395 Triple Gamma Angular Correlation Studies of the Radiations from the Decay of Ir*92 : U.S. Pande and B. P. Singh 401 Determination of Conversion Coefficients in 75As. g. Mallikarjuna Rao, K. Venkata Ramaniah and K. Venkata Reddy 407 ' Conversion Electron Studies following the 7<?, 8lBr(p, n)79, 81jQr Reactions-: Y. K. Agarwal, C.V.K. Baba, M. G. Betigeri, S. M. Bharathi, B. Lai and N. G. Puttaswamy 413 High Resolution Study of Transitions in *44Pr : K. G. Prasad and A.K. Bandyopadhyay 420 Conversion Coefficient Measurements in * "Dy : K. Venkata Ramaniah, P. Mallikharjuna Rao and K. Venkata Reddy 421 High Resolution Internal Conversion Measurements in the Decay of Lul77, Lux77m And Yt>177. K. p. Gopinathan, A. P. Agnihotry, S.B. Patel, M. C. Joshi and M. S. Bidarkundi 425 Penetration Effects in Internal Conversion of Transitions in Lu177 and Hf177 : k. P. Gopinathan and A. P. Agnihotry 431.Electromagnetic Transitions in 186W, 186,1880g. B.N. Subba Rao 437 Half-life of the kev Transition in *99Hg and the Internal Conversion Coefficients of the Transitions in ^-^^Hg : H. Singh, B. Sethi and V.K. Tikku 445 Decay of 48Sc : H. Singh, V.K. Tikku and B. Sethi 451 Decay of 97Zr and 97Nb : V.K. Tikku, H. Singh and B. Sethi 455

8 S&odiea of Even Sn Nuclei from the Decay of In : T. Nagarajan, B. Fogelberg and A. Backlin 461 Beta-Gamma Circular Polarization Correlation in *48Pm.- H. C. Padhi and S. K. Mitra 467 IV. NEW EXPERIMENTAL METHODS AND TECHNIQUES Model Studies on a Half GeV Cyclotron : A. Jain and A. S. Divatia 473 Trombay Ion - Implantation Facility And Some Results on Implantation of Xe*, Kr+, and N* Ions : D.K. Sood, N. S. Thampi and N. Sarma 479 A Study of the Proper tie a of Ion Beam from Duoplasmatron : D. K. Bose, S. N. Sengupta and B. D. Nagchaudhuri 489 A High Precision Generating Voltmeter : B. Mitra, N. G. Joyce and W. D. Allen 495 A New Plastic Track Detector : D.K. Sood and N. S. Thampi 501 High Resolution Si(Li) Spectrometer and its Analytical Applications : Madan Lai and S. S. Kapoor 503 Modification of the Siegbahn-Slatis Beta Ray Spectrometer for Beta Gamma Coincidence Studies : M. Ravindranath, C. Narasimha Rao and K. Venkata Reddy 511 L/K Electron Capture Ratio from Gamma Ray X-Ray Sum - Peak in Ge(Li) Spectra : B. K. Dasmahapatra 515 A Fast Neutron Time-of-Flight Spectrometer for Use in Neutron-Gamma Ray Coincidence Experiments : N. L. Ragoowansi and M. A. Eswaran 522 Second Order Spherical Aberration due to a Dipoie Magnet : N. C. Bhattacharya, R. C. Sethi, R.K. Bhandari and A.S. Divatia 523 Effect of Magnetic Field Errors on Orbit Properties in Cyclic Accelerators : A. Jain 531 Me&aurement and Evaluation of the Fringing Field Effects te a 2 cm. Quadrupole Magnet : R. C. Sethi, A. Jain and A. S, Divatia 537

9 Beam Dynamic Stability Studies for the 224 cm. Variable Energy Cyclotron : A. Jain and A.S, Divatia 543 Radial Motion Studies in the 224 cms. Variable Energy Cyclotron: R. K. Bhandari, N. C. Bhattacharya and A. S. Divatia 547 Timing Properties of Ge(Li) Detector (Ortec-Model , G-7, 6D) : A.K. Singhvi, D.K. Gupta and G.N. Rao 555 REACTOR PHYSICS Kinetics of the Pulsed Fast Reactor Critical Assembly with Temperature Feedback: S. Das and M. Srinivasan 561 D. C. Channels for Control of Fast Critical Facility: V, A. Pethe, Rishi Kumar, A. A. Patankar, N. C. Rathod, M. D. Chodgaonkar and S. A, Gogate 579 Calculation of K^for Bare Cylinder and Hexagonal Geometries : B. K. Godwal, K. Subbukutty and S. B. D. Iyengar. 585 Maximisation of Desired Activity against Interfering Activities in Threshold Reactions : O. P. Joneja, D, V. S. Ramakrishna and M. P. Navalkar 589 Neutronic Measurements Proposed in Fast Breeder Test Reactor : R. Shankar Singh 595 Measurement of Fast Fission Ratios in Natural UO, Clusters : H. M. Jain and V. C. Deniz 603 Inverse Kinetics Analysis of Power-time Trace Data of Heavy- Water Reactors : M. Srinivasan 609 Neutron Scattering Cross Section for Liquid Methane: K. R, Rao and B. A Dasannacharys 619 Complete Back Scattering Effects in Neutron Wave Propagation Problem: LC. Goyal, A.K. Ghatak, Om Pal Singh and S. Sobhana 625 On the Transport of One Speed Neutrons : A. K. Ghatak, Shashi Bala, S. Sobhana and N. K. Bansal 639 A New Variational Method for Pulsed Neutron Problem: Feroz Ahmed and Subhash Saini 659 A Generalised Formulation of the Continuous Slowing Down of Neutrons : A. Sengupta and G. Srikantiah 667 A Correlation between the Resonance and CireuUng-GoeTtsel Approximations s Av Sengupta and G 5r.ikswy.ab *'< *.

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