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NSR database version of April 26, 2024.

Search: Author = K.Kar

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2021BH08      Eur.Phys.J. Special Topics 230, 505 (2021)

P.Bhattacharjee, K.Kar

Supernova neutrino detection through neutron emission by nuclei

NUCLEAR REACTIONS ⁵⁶Fe(ν, e^-)⁵⁶Co, E<60 MeV; ¹³²Xe(ν, e^-)¹³²Cs, E<10 MeV; calculated σ, one-, two- and three-neutron emission probabilities, neutron yields.

doi: 10.1140/epjs/s11734-021-00002-6
Citations: PlumX Metrics

2020KA65      Pramana 94, 100 (2020)

K.Kar, S.Sarkar

The linear term in the isobaric-mass-multiplet equation for fp-shell nuclei in the framework of spectral distribution theory

doi: 10.1007/s12043-020-01957-2
Citations: PlumX Metrics

2015KA10      J.Phys.(London) G42, 055110 (2015)

K.Kar, S.Sarkar

Study of isospin nonconservation in the framework of spectral distribution theory

doi: 10.1088/0954-3899/42/5/055110
Citations: PlumX Metrics

2013KA02      J.Phys.(London) G40, 015105 (2013)

K.Kar

Statistical spectroscopy for neutron-rich sd-shell nuclei

NUCLEAR STRUCTURE ^21,22,23O, ^{20,21,22,23,24,25,26,27,28}F, ^{20,21,22,23,24,25,26,27,28,29}Ne, ^{22,23,24,25,26,27,28,29,30,31}Na, ^{24,25,26,27,28,29,30,31,32}Mg, ^{26,27,28,29,30,31,32,33}Al, ^{28,29,30,31,32,33,34}Si, ^{30,31,32,33,34,35}P, ^32,33,34,35S, ^34,35,36Cl, ³⁶Ar; calculated binding energies, E2 strength, total orbit occupancy. Distribution theory, comparison with available data.

doi: 10.1088/0954-3899/40/1/015105
Citations: PlumX Metrics

2007MA24      Pramana 68, 423 (2007)

D.Majumdar, K.Kar

Beta decay rates of nuclei with 65 < A < 75 for pre-supernova and supernova evolution

RADIOACTIVITY ^66,68,69Co, ^67,68,69,71Ni, ^68,72,74Cu(β^-); calculated T_1/2, astrophysical decay rates.

2006KA46      Pramana 67, 363 (2006)

K.Kar, S.Chakravarti, V.R.Manfredi

Beta decay rates for nuclei with 115 < A < 140 for r-process nucleosynthesis

RADIOACTIVITY ^116,117Rh, ^118,120Ag, ¹²⁵Cd, ^{128,130,131,132}In, ¹³³Sn, ^132,134,136Sb, ^136,137,138I, ^137,138Te(β^-); calculated T_1/2, β-decay rates. Astrophysical implications discussed.

doi: 10.1007/s12043-006-0081-2
Citations: PlumX Metrics

2004GO30      Phys.Rev. C 69, 057302 (2004)

J.M.G.Gomez, K.Kar, V.K.B.Kota, R.A.Molina, J.Retamosa

Number of principal components and localization length in E2 and M1 transition strengths in ⁴⁶V

NUCLEAR STRUCTURE ⁴⁶V; calculated E2 and M1 transition strengths, number of principal components. Embedded Gaussian orthogonal random matrix ensemble.

doi: 10.1103/PhysRevC.69.057302
Citations: PlumX Metrics

2003GO16      Phys.Lett. B 567, 251 (2003)

J.M.G.Gomez, K.Kar, V.K.B.Kota, R.A.Molina, J.Retamosa

Localization in 2p1f nuclear shell-model wavefunctions

NUCLEAR STRUCTURE ^48,50,52Ca, ^46,48,50Sc, ⁴⁶Ti; calculated localization lengths for shell-model wavefunctions; deduced isospin dependence in onset of nuclear chaos. Embedded Gaussian orthogonal ensemble.

doi: 10.1016/j.physletb.2003.06.041
Citations: PlumX Metrics

2001GO37      Phys.Rev. C64, 034305 (2001)

J.M.G.Gomez, K.Kar, V.K.B.Kota, J.Retamosa, R.Sahu

Transition Strengths and Quantum Chaos in Large Shell-Model Spaces

NUCLEAR STRUCTURE ³⁶Ne, ³⁶Na, ³⁶Mg, ⁴⁶Ti, ^48,52Sc; calculated E2, M1, and Gamow-Teller transition strength sums vs excitation energy. Shell model, comparison with embedded Gaussian orthogonal ensemble predictions.

doi: 10.1103/PhysRevC.64.034305
Citations: PlumX Metrics

2000GO14      Phys.Lett. 480B, 245 (2000)

J.M.G.Gomez, K.Kar, V.R.Manfredi, R.A.Molina, J.Retamosa

Statistical Theory versus Shell Model in a Large pf Configuration Space

NUCLEAR STRUCTURE ⁴⁶V, ⁵⁰Sc; calculated transition strength distributions. Comparison of shell model, statistical model.

doi: 10.1016/S0370-2693(00)00414-7
Citations: PlumX Metrics

1999KO48      Phys.Rev. C60, 051306 (1999)

V.K.B.Kota, R.Sahu, K.Kar, J.M.G.Gomez, J.Retamosa

Transition Strength Sums and Quantum Chaos

doi: 10.1103/PhysRevC.60.051306
Citations: PlumX Metrics

1998CH19      Phys.Rev. C58, 597 (1998)

S.Choubey, K.Kar, J.M.G.Gomez, V.R.Manfredi

Spectral Distribution Studies with a Modified Kuo-Brown Interaction in the Upper Half of the fp Shell

NUCLEAR STRUCTURE Z=26-36; calculated binding energies, GT sum rule strengths. Spectral distribution method, modified Kuo-Brown interaction.

doi: 10.1103/PhysRevC.58.597
Citations: PlumX Metrics

1998KA34      J.Phys.(London) G24, 1641 (1998)

K.Kar, S.Chakravarti, A.Ray, S.Sarkar

Half-Lives and Presupernova Weak Interaction Rates for Nuclei Away from the Stability Line

RADIOACTIVITY ^68,69Co, ⁶⁸Fe, ^69,71,72Ni, ^71,72,73Cu, ^58,59Cr, ⁶³Mn(β^-); calculated T_1/2.

doi: 10.1088/0954-3899/24/8/045
Citations: PlumX Metrics

1998MA76      J.Phys.(London) G24, 2103 (1998)

D.Majumdar, K.Kar, A.Ansari

Giant Dipole Resonance in Spectral Averaging Theory and Analysis of Experimental Data for the ⁷⁶Se Nucleus

NUCLEAR STRUCTURE ⁷⁶Se; calculated GDR photon adsorption σ. Spectral averaging theory. Comparison with data.

doi: 10.1088/0954-3899/24/11/011
Citations: PlumX Metrics

1997KA13      Phys.Rev. C55, 1260 (1997)

K.Kar, S.Sarkar, J.M.G.Gomez, V.R.Manfredi, L.Salasnich

Spectral Distribution Studies of fp Shell Nuclei with a Modified Kuo-Brown Interaction

NUCLEAR STRUCTURE ⁴⁸Sc, ⁴⁶Ti; calculated levels. A=46-56; Z=20-28; calculated binding energy. Spectral distribution method, Kuo-Brown interaction.

doi: 10.1103/PhysRevC.55.1260
Citations: PlumX Metrics

1997KA73      Mod.Phys.Lett. A 12, 2279 (1997)

K.Kar, S.Sarkar, S.Goswami, A.Raychaudhuri

Excited States of ⁷¹Ge Above the Neutron Emission Threshold and Solar Neutrino Capture Rates for Ga Detectors

NUCLEAR STRUCTURE ⁷¹Ge; calculated Gamow-Teller strengths; deduced Ga solar neutrino detector ν capture rates, importance of states beyond neutron threshold.

doi: 10.1142/S0217732397002351
Citations: PlumX Metrics

1997MA40      J.Phys.(London) G27, L41 (1997)

D.Majumdar, K.Kar, A.Ansari

Giant Dipole Resonance in Spectral Averaging Theory

NUCLEAR REACTIONS, ICPND ⁶⁴Zn(γ, X), E ≤ 45 MeV; calculated GDR absorption σ(E). Spectral averaging theory.

doi: 10.1088/0954-3899/23/7/001
Citations: PlumX Metrics

1996SA30      Phys.Lett. 387B, 227 (1996)

S.Sarkar, K.Kar

Gamow-Teller Strengths in f(p) Shell

NUCLEAR STRUCTURE ⁴⁵Sc, ⁵¹V, ⁵⁵Mn, ⁵⁹Co, ⁴⁸Ti, ^56,54Fe, ^58,60,62,64Ni, ⁷⁰Ge; calculated Gamow-Teller transition strength. Spectral distribution theory, simple parametrization based.

doi: 10.1016/0370-2693(96)00966-5
Citations: PlumX Metrics

1995SA20      J.Phys.(London) G21, 411 (1995)

S.Sarkar, K.Kar

Effect of Inclusion of 1g Orbits on the Gamow-Teller Strengths for the Capture Rates of Solar Neutrinos in Ga Detectors

NUCLEAR REACTIONS ⁷¹Ga(p, n), E=medium; calculated Gamow-Teller transition strength; deduced Ga detector ν capture rates. Extended shell model.

doi: 10.1088/0954-3899/21/3/015
Citations: PlumX Metrics

1992CH43      Z.Phys. A344, 149 (1992)

J.M.Chatterjee, S.Basu, R.K.Chattopadhyay, K.Kar, D.Banik, R.P.Sharma, S.K.Pardhasaradhi

High Spin Isomer in ¹⁵¹Sm

NUCLEAR REACTIONS ¹⁵⁰Nd(α, 3nγ), E=35 MeV; measured γγ-coin. ¹⁵¹Sm deduced isomer, other levels T_1/2.

doi: 10.1007/BF01291698
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1991KA25      Phys.Lett. 261B, 217 (1991)

K.Kar, S.Sarkar, A.Ray

Beta Decay Rates of fp Shell Nuclei in Advanced Evolutionary Stages of Presupernova Stars

RADIOACTIVITY ⁶⁸Cu, ⁶⁷Ni, ^64,63,62Co, ⁶¹Fe; calculated β-decay T_1/2, decay rate. Gamow-Teller sum rule strength input.

doi: 10.1016/0370-2693(91)90317-J
Citations: PlumX Metrics

1989KA32      Pramana 32, 497 (1989)

K.Kar, S.Sarkar

Spectral Distribution Theory - Some Recent Applications

NUCLEAR STRUCTURE ^60,64,54,56Fe, ^58,60Ni; calculated average β-strength sum. ²⁰Ne, ²⁴Mg, ²⁸Si; calculated Gamow-Teller, isovector M1 transition strength sum. Spectral distribution methods.

doi: 10.1007/BF02845980
Citations: PlumX Metrics

1989SA26      Phys.Rev. C40, 1826 (1989)

S.Sarkar, K.Kar

Gamow-Teller and M1 Strength Sums for sd Shell Nuclei by Spectral Distribution Methods

NUCLEAR STRUCTURE ²⁰Ne, ²⁴Mg, ²⁸Si, ³²S; calculated Gamow-Teller, M1 transition strength sums for ground, excited states. Spectral distribution method.

doi: 10.1103/PhysRevC.40.1826
Citations: PlumX Metrics

1988CH39      Phys.Rev. C38, 2435 (1988)

R.K.Chattopadhyay, B.Sethi, J.M.Chatterjee, K.Kar, P.Banerjee

Unfavored Allowed Beta Decay of the (11/2)^- Isomer of ¹⁴¹Nd

RADIOACTIVITY ^141mNd(β⁺) [from ¹⁴²Nd(n, 2n), E=14 MeV]; measured Eγ, Iγ; deduced log ft, β-feeding, isomer T_1/2. Natural target. ¹⁴¹Pr deduced levels, transitions, branching ratios.

NUCLEAR REACTIONS ¹³⁹La(α, 2nγ), E=30 MeV; measured Eγ, Iγ. ¹⁴¹Pr deduced levels, branching ratios. Natural target, hyperpure Ge detectors.

doi: 10.1103/PhysRevC.38.2435
Citations: PlumX Metrics

1988PA13      J.Phys.(London) G14, 1083 (1988)

D.Pal, S.Chattopadhyay, K.Kar

Non-Markovian Features of Deeply Inelastic Collisions

NUCLEAR REACTIONS ¹⁶⁶Er(⁸⁶Kr, X), E=703 MeV; ²⁰⁹Bi(¹³⁶Xe, X), E=1130 MeV; calculated charge transfer variances, drift. Deep inelastic collisions, non-Markovian features.

doi: 10.1088/0305-4616/14/8/011
Citations: PlumX Metrics

1988SA17      J.Phys.(London) G14, L123 (1988)

S.Sarkar, K.Kar

Gamow-Teller Strength Sums for Nuclei in the fp Shell

NUCLEAR STRUCTURE ^54,56,60,64Fe, ^58,60Ni; calculated Gamow-Teller transition strength sums.

doi: 10.1088/0305-4616/14/6/001
Citations: PlumX Metrics

1987SA48      Phys.Rev. C36, 2700 (1987)

S.Sarkar, K.Kar, V.K.B.Kota

Spectral Distribution Calculations using Wildenthal's Universal sd Interaction

NUCLEAR STRUCTURE A=20-36; calculated binding energies. A=21-35; calculated ground state s-, d-orbital occupancies. ²⁸Si; calculated levels. Spectral distribution method.

doi: 10.1103/PhysRevC.36.2700
Citations: PlumX Metrics

1983KA12      J.Phys.(London) G9, 735 (1983)

K.Kar

M1 Strengths and Sum Rules in the Wigner Supermultiplet Scheme

NUCLEAR STRUCTURE ^20,21Ne, ^22,23Na, ²⁶Mg; calculated isoscalar, isovector B(M1) strengths. ²²Na; calculated nonenergy weighted sum rule strength. SU(4) model.

doi: 10.1088/0305-4616/9/7/009
Citations: PlumX Metrics

1983KA32      Phys.Rev. C28, 2446 (1983)

K.Kar

Gamow-Teller Decay Strength in the Wigner Supermultiplet Scheme

NUCLEAR STRUCTURE ²⁰F, ^21,22Mg, ²³Ne, ²⁴Al, ³³Ar, ³⁵S, ³⁶K; calculated Gamow-Teller transition log ft. SU(4) spin-isospin spaces, spectral distribution method.

doi: 10.1103/PhysRevC.28.2446
Citations: PlumX Metrics

1981CO04      Nucl.Phys. A356, 1 (1981)

C.R.Countee, J.P.Draayer, T.R.Halemane, K.Kar

Shell-Model Studies of Statistical Approximations to Model Interactions

NUCLEAR STRUCTURE ^20,22Ne; calculated levels, B(E2), eigenstate overlaps. Shell model, statistical approximation.

doi: 10.1016/0375-9474(81)90113-5
Citations: PlumX Metrics

1981KA06      Phys.Lett. 98B, 393 (1981)

K.Kar, S.S.M.Wong

A Shell Model Study of the Gamow-Teller Giant Resonance

NUCLEAR STRUCTURE ²¹Mg; calculated β⁺-decay, Gamow-Teller strength function. SU(4) symmetry, statistical spectroscopy methods.

doi: 10.1016/0370-2693(81)90438-X
Citations: PlumX Metrics

1981KA32      Nucl.Phys. A368, 285 (1981)

K.Kar

A Statistical Method for the Study of Beta Decay Giant Resonances

RADIOACTIVITY ¹⁶O, ^20,21,22F, ^23,25Ne, ^25,26,28Na; calculated β-decay T_1/2; ²¹Mg, ²³Ne; calculated log ft. Statistical giant resonance decay.

doi: 10.1016/0375-9474(81)90686-2
Citations: PlumX Metrics