Publications

Journals
Theses
Conferences

Refereed Journals and Monographs (1996-2006)

S.K. Tandel, P. Chowdhury, E.H. Seabury, I. Ahmad, M.P. Carpenter, S.M. Fischer, R.V.F. Janssens, T.L. Khoo, T. Lauritsen, C.J. Lister, D. Seweryniak, Y.R. Shimizu, ?High-K Isomers and Rotational Structures in 174W,? Phys.Rev.C73, 044306 (2006).

G.D. Dracoulis, G.J. Lane, F.G. Kondev, A.P. Byrne, R.O. Hughes, P. Nieminen, H. Watanabe, M.P. Carpenter, R.V.F. Janssens, T. Lauritsen, D. Seweryniak, S. Zhu, P. Chowdhury, F.R. Xu, ?Two-quasiparticle K-isomers and pairing strengths in the neutron-rich isotopes 174Er and 172Er," Phys.Lett. B635, 200 (2006).

A.N. Deacon, S.J. Freeman, R.V.F. Janssens, F.R. Xu, M.P. Carpenter, I.R. Calderin, P. Chowdhury, N.J. Hammond, T. Lauritsen, C.J. Lister, D. Seweryniak, J.F. Smith, S.L. Tabor, B.J. Varley, S. Zhu, ?Changes in ?g9/2 shape polarisation across the odd neutron-rich Cr isotopes,? Phys.Lett. B622, 151 (2005); Erratum Phys.Lett. B625, 375 (2005).

M.A. Riley, M.K. Djongolov, A.O. Evans, D.J. Hartley, R.V.F. Janssens, E.S. Paul, J. Simpson, A.A. Aguilar, D.E. Appelbe, C.R. Bingham, D.B. Campbell, M.P. Carpenter, P. Chowdhury, P.T.W. Choy, R.M. Clark, M. Cromaz, D.M. Cullen, M. Danchev, G.D. Dracoulis, P. Fallon, A. Gorgen, G.B. Hagemann, D.T. Joss, J. Goon, R.A. Kaye, T.L. Khoo, F.G. Kondev, R.W. Laird, K. Lagergren, T. Lauritsen, A.O. Macchiavelli, B. McClain, E.F. Moore, G. Mukherjee, E. Ngijoi-Yogo, P.J. Nolan, H.I. Park, A. Pipidis, L.L. Riedinger, G. Sletten, S.K. Tandel, P.M. Walker, D. Ward, I. Ragnarsson, F. Saric, J. Zhang, ?Beyond band termination in 157Er and the search for wobbling excitations in strongly deformed 174Hf,? J.Phys. G31, S1735 (2005).

D.G. Jenkins, C.J. Lister, M.P. Carpenter, P. Chowdhury, N.J. Hammond, R.V.F. Janssens, T.L. Khoo, T. Lauritsen, D. Seweryniak, T. Davinson, P.J. Woods, A. Jokinen, H. Penttila, ?Mirror energy differences in the A = 31 mirror nuclei, 31S and 31P, and their significance in electromagnetic spin-orbit splitting,? Phys.Rev. C72, 031303 (2005)

D.J. Hartley, W.H. Mohr, J.R. Vanhoy, M.A. Riley, A. Aguilar, C. Teal, R.V.F. Janssens, M.P. Carpenter, A.A. Hecht, T. Lauritsen, E.F. Moore, S. Zhu, F.G. Kondev, M.K. Djongolov, M. Danchev, L.L. Riedinger, G.B. Hagemann, G. Sletten, P. Chowdhury, S.K. Tandel, W.C. Ma, S.W. Odegard, ?Detailed high-spin spectroscopy and the search for the wobbling mode in 171Ta," Phys.Rev. C72, 064325 (2005).

S.J. Freeman, R.V.F. Janssens, A.N. Deacon, F. Xu, I.J. Calderin, M.P. Carpenter, P. Chowdhury, S.M. Fischer, N.J. Hammond, M. Honma, T. Lauritsen, C.J. Lister, T.L. Khoo, G. Mukherjee, D. Seweryniak, J.F. Smith, S.L. Tabor, B.J. Varley, S. Zhu, ?Structure of the neutron-rich Cr isotopes,? J.Phys. G31, S1465 (2005).

S. Zhu, R.V.F. Janssens, G.J. Lane, I. Wiedenhover, M.P. Carpenter, I. Ahmad, A.P. Byrne, P. Chowdhury, D. Cline, A.N. Deacon, G.D. Dracoulis, S.J. Freeman, N.J. Hammond, G.D. Jones, T.L. Khoo, F.G. Kondev, T. Lauritsen, C.J. Lister, A.O. Macchiavelli, E.F. Moore, D. Seweryniak, J.F. Smith, C.Y. Wu, ?Strength of octupole correlations in the actinides: contrasting behavior in the isotones 237U and 239Pu,?Phys.Lett. B618, 51 (2005).

D.J. Hartley, M.K. Djongolov, L.L. Riedinger, G.B. Hagemann, R.V.F. Janssens, F.G. Kondev, E.F. Moore, M.A. Riley, A. Aguilar, C.R. Bingham, D.B. Campbell, M.P. Carpenter, P. Chowdhury, M. Cromaz, D.M. Cullen, M. Danchev, G.D. Dracoulis, P. Fallon, J. Goon, R.A. Kaye, T.L. Khoo, R.W. Laird, T. Lauritsen, A.O. Macchiavelli, B. McClain, G. Mukherjee, E. Ngijoi-Yogo, H.I. Park, G. Sletten, S.K. Tandel, P.M. Walker, J.-Y. Zhang, ?Wobbling excitations in strongly deformed Hf nuclei?,? Phys.Lett. B608, 31 (2005).

G.D. Dracoulis, G.J. Lane, F.G. Kondev, A.P. Byrne, T. Kibedi, H. Watanabe, I. Ahmad, M.P. Carpenter, S.J. Freeman, R.V.F. Janssens, N.J. Hammond, T. Lauritsen, C.J. Lister, G. Mukherjee, D. Seweryniak, P. Chowdhury, S.K. Tandel, ?Structure of two-, four-, and six-quasiparticle isomers in 174Yb and K-forbidden decays,? Phys.Rev. C71, 044326 (2005), Erratum Phys.Rev. C73, 019901 (2006).

D.-C. Dinca, R.V.F. Janssens, A. Gade, D. Bazin, R. Broda, B.A. Brown, C.M. Campbell, M.P. Carpenter, P. Chowdhury, J.M. Cook, A.N. Deacon, B. Fornal, S.J. Freeman, T. Glasmacher, M. Honma, F.G. Kondev, J.-L. Lecouey, S.N. Liddick, P.F. Mantica, W.F. Mueller, H. Olliver, T. Otsuka, J.R. Terry, B.A. Tomlin, K. Yoneda, ?Reduced transition probabilities to the first 2+ state in 52, 54, 56Ti and development of shell closures at N=32, 34," Phys.Rev. C71, 041302 (2005).

D.T. Scholes, D.M. Cullen, F.G. Kondev, R.V.F. Janssens, M.P. Carpenter, D.J. Hartley, M.K. Djongolov, G. Sletten, G. Hagemann, C. Wheldon, P.M. Walker, K. Abu Saleem, I. Ahmad, D.L. Balabanski, P. Chowdhury, M. Danchev, G.D. Dracoulis, H.M. El-Masri, J. Goon, A. Heinz, R.A. Kaye, T.L. Khoo, T. Lauritsen, C.J. Lister, E.F. Moore, L.L. Riedinger, M.A. Riley, D. Seweryniak, I. Shestakova, I. Wiedenhover, O. Zeidan, J.-ye. Zhang, ?Highly deformed Bands in 175Hf,? Phys.Rev. C70, 054314 (2004).

F.G. Kondev, G.D. Dracoulis, G.J. Lane, I. Ahmad, A.P. Byrne, M.P. Carpenter, P. Chowdhury, S.J. Freeman, N.J. Hammond, R.V.F. Janssens, T. Kibedi, T. Lauritsen, C.J. Lister, G. Mukherjee, D. Seweryniak, S.K. Tandel, ?K-Mixing and fast decay of a seven-quasiparticle isomer in 179Ta,? Eur.Phys.J. A22, 23 (2004).

G.D. Dracoulis, F.G. Kondev, G.J. Lane, A.P. Byrne, T. Kibedi, I. Ahmad, M.P. Carpenter, S.J. Freeman, R.V.F. Janssens, N.J. Hammond, T. Lauritsen, C.J. Lister, G. Mukherjee, D. Seweryniak, P. Chowdhury, S.K. Tandel, R. Gramer, ?Identification of yrast high-K isomers in 177Lu and characterisation of 177mLu,? Phys.Lett.B584, 22 (2004).

K. Abu Saleem, R.V.F. Janssens, M.P. Carpenter, F.G. Kondev, I. Wiedenhover, I. Ahmad, J. Caggiano, P. Chowdhury, J.A. Cizewski, D. Cline, M. Devlin, N. Fotiades, J.P. Greene, G. Hackman, A. Heinz, T.L. Khoo, T. Lauritsen, C.J. Lister, A.O. Macchiavelli, E.H. Seabury, D. Seweryniak, A. Sonzogni, C.Y. Wu, ?Alignments in the odd-proton actinides 237Np and 241Am,? Phys.Rev. C70, 024310 (2004).

M.K. Djongolov, D.J. Hartley, L.L. Riedinger, F.G. Kondev, R.V.F. Janssens, K. Abu Saleem, I. Ahmad, D.L. Balabanski, M.P. Carpenter, P. Chowdhury, D.M. Cullen, M. Danchev, G.D. Dracoulis, H. El-Masri, J. Goon, A. Heinz, R.A. Kaye, T.L. Khoo, T. Lauritsen, C.J. Lister, E.F. Moore, M.A. Riley, D. Seweryniak, I. Shestakova, G. Sletten, P.M. Walker, C. Wheldon, I. Wiedenh?ver, O. Zeidan and Jing-Ye Zhang, ?Extending the Region of Triaxial Superdeformation: Candidate TSD bands in 174Hf,"Phys. Lett. B560, 24 (2003).

D.J. Hartley, M.K. Djongolov, L.L. Riedinger, F.G. Kondev, R.V.F. Janssens, K. Abu Saleem, I. Ahmad, D.L. Balabanski, M.P. Carpenter, P. Chowdhury, D.M. Cullen, M. Danchev, G.D. Dracoulis, H. El-Masri, J. Goon, A. Heinz, R.A. Kaye, T.L. Khoo, T. Lauritsen, C.J. Lister, E.F. Moore, M.A. Riley, D. Seweryniak, I. Shestakova, G. Sletten, P.M. Walker, C. Wheldon, I. Wiedenh?ver, O. Zeidan and Jing-Ye Zhang, ?Possible Triaxial Superdeformation in 174Hf,? Proc. Conf. on Frontiers of Nuclear Structure, Berkeley, CA, August 2002, P. Fallon and R. Clark, Eds, AIP Conf. Proc. 656, 171(2003).

P. Chowdhury, "Microscopy of Femtoscale Structures," Pramana 57, 31 (2001).

P. Chowdhury, I. Shestakova, R. D'Alarcao, C.J. Pearson, Z. Podolyak, P.M. Walker, C. Wheldon, D.M. Cullen, I.Ahmad, M.P. Carpenter, R.V.F. Janssens, T.L. Khoo, F. Kondev, C.J. Lister, D. Seweryniak and I. Wiedenhoever, "Harvesting New Isomers in Neutron-rich Hafnium Nuclei," Nucl. Phys. A682, 65c (2001).

I. Shestakova, G. Mukherjee, P. Chowdhury, R. D'Alarcao, C.J. Pearson, Zs. Podolyak, P.M. Walker, C. Wheldon, I.Ahmad, M.P. Carpenter, R.V.F. Janssens, T.L. Khoo, F.G. Kondev, C.J. Lister, D. Seweryniak and I. Wiedenhoever, "Yrast Three-quasiparticle K-Isomers in Neutron-Rich 181Hf," Phys. Rev. C64, 054307 (2001).

C. Wheldon, P.M. Walker, P. Chowdhury, I. Shestakova, R. D'Alarcao, I.Ahmad, M.P. Carpenter, D.M. Cullen, R.V.F. Janssens, T.L. Khoo, F.G. Kondev, C.J. Lister, C.J. Pearson, Z. Podolyak, D. Seweryniak and I. Wiedenhoever "First Observation of a Rotational Band in neutron-rich 180Lu, " J. Phys. G27, L13 (2001).

C. Wheldon, P.M. Walker, P. Chowdhury, I. Shestakova, R. D'Alarcao, I.Ahmad, M.P. Carpenter, D.M. Cullen, R.V.F. Janssens, T.L. Khoo, F.G. Kondev, C.J. Lister, C.J. Pearson, Zs. Podolyak, D. Seweryniak and I. Wiedenhoever "Inelastic Excitation of New High-spin Yrast Isomers in 180Ta," Phys. Rev. C62, 057301 (2000).

C. Wheldon, P.M. Walker, C.J. Pearson, R. D'Alarcao, P. Chowdhury, E.H. Seabury, I.Ahmad, M.P. Carpenter, G. Hackman, R.V.F. Janssens, T.L. Khoo, C.J. Lister, D. Nisius, P.Reiter, D. Seweryniak I. Wiedenhoever and D.M. Cullen, "High-spin K-Isomers Beyond the Fusion Limit," Proc. Second Int. Conf. on Fission and Properties of Neutron-rich Nuclei, St. Andrews, Scotland, June 1999, Hamilton, Phillips, Carter, Eds, World Scientific, 2000, p.171.

R. D'Alarcao, P. Chowdhury, E. Seabury, P.M. Walker, C. Wheldon, I.Ahmad, M.P. Carpenter, G. Hackman, R.V.F. Janssens, T.L. Khoo, C.J. Lister, D. Nisius, P.Reiter, D. Seweryniak and I. Wiedenhoever, "High K-Isomers in Neutron-Rich Hafnium Nuclei At and Beyond the Stability Line," Phys. Rev. C59, R1227 (1999).

C. Wheldon, P.M. Walker, R. D'Alarcao, P. Chowdhury, C.J. Pearson, E. H. Seabury, I.Ahmad, M.P. Carpenter, D.M. Cullen, G. Hackman, R.V.F. Janssens, T.L. Khoo, D. Nisius, P.Reiter, "Identification of a High-K Isomer in Neutron-Rich 185Ta," Euro. Phys. J. A5, 353 (1999).

I. Wiedenhover, R.V.F. Janssens, G. Hackman, I. Ahmad, J.P. Greene, H. Amro, P.K. Bhattacharyya, M.P. Carpenter, P. Chowdhury, J. Cizewski, D. Cline, T.L. Khoo, T. Lauritsen, C.J. Lister, A.O. Macchiavelli, D.T. Nisius, P. Reiter, E.H. Seabury, D. Seweryniak, S. Siem, A. Sonzogni, J. Uusitalo, and C.Y. Wu, "Octupole Correlations in the Pu Isotopes : From Vibration to Static Deformation?," Phys. Rev. Lett. 83, (1999) 2143.

P. Chowdhury, R. D'Alarcao, E. Seabury, P.M. Walker, C. Wheldon, I. Ahmad, M.P. Carpenter, G. Hackman, R.V.F. Janssens, T.L. Khoo, D. Nisius and P.Reiter, "K-Isomers in Hf Nuclei At and Beyond the Stability Line," Nucl.Phys., A654, 651c (1999).

C. Wheldon, R. D'Alarcao, P. Chowdhury, P.M. Walker, E. Seabury, I. Ahmad, M.P. Carpenter, D.M. Cullen, G. Hackman, R.V.F. Janssens, T.L. Khoo, D. Nisius, C.J. Pearson and P. Reiter, "Opening up the A~180 K-Isomer Landscape : Inelastic Excitation of New Multi-quasiparticle Yrast Traps," Phys. Lett.  B425, 239 (1998).

P. Chowdhury, B. Crowell, I. Ahmad, D.J. Blumenthal, M.P. Carpenter, S.M. Fischer, R.V.F. Janssens, T.L. Khoo, C.J. Lister, T. Lauritsen  and D. Nisius, "K-Isomers at Gammasphere," in Gammasphere Physics, Deleplanque, Lee and Machiavelli, Eds., World Scientific, 1996, p.212. B. Crowell, P. Chowdhury, S.J. Freeman, C.J. Lister, M.P. Carpenter, R.G. Henry, R.V.F. Janssens, T.L. Khoo,T. Lauritsen, Y. Liang, F. Soramel and I.G. Bearden, "High-K Isomers in 176W and Mechanisms of K-Violation", Phys. Rev. C53, 1173 (1996).

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Ph.D. Theses
 
2004 : E. Ngijoi-Yogo, Collective Band Structures in Neutron-Rich 180,182Hf Nuclei

2002 : I. Shestakova, Decay Spectroscopy of Multi-quasiparticle K-Isomers in Neutron-Rich 181,182Hf Nuclei

2000 : R. D'Alarcao, Isomers in Stable and Neutron-Rich Hafnium Nuclei Using Inelastic/Transfer Reactions and Gamma-Ray Spectroscopy

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Contributed Conference Talks (1995-2002) 
 
E. Ngijoi-Yogo et al., Prompt rotational structures in neutron-rich 180,181,182Hf, Proc. Conf. on Frontiers of Nuclear Structure, Berkeley, July/Aug, 2002, p 119.

G. Mukherjee et al., Decay of a high-K isomer in 254No by gamma and electron spectroscopy, Proc. Conf. on Frontiers of Nuclear Structure, Berkeley, July/Aug, 2002, p 115.

E. Ngijoi-Yogo et al., Prompt Spectroscopy of Neutron-rich 180,181,182Hf Nuclei, Bull. Am. Phys. Soc. 47, No.2 (2002) 71.

I. Shestakova et al., New Four-quasiparticle K-isomers in Neutron-rich 182Hf, Proc. Int. Nucl. Phys. Conf. (INPC2001) Nuclear Physics in the 21st Century, July 2001, Berkeley, p.655.

G. Mukherjee et al., New Evidence for K-hindered Decay of a 6-qp Isomer in 176Hf, Proc. Int. Nucl. Phys. Conf. (INPC2001) Nuclear Physics in the 21st Century, July 2001, Berkeley, p.627.

I. Shestakova et al., New Four-quasiparticle Excitations in 182Hf, Bull. Am. Phys. Soc. 46, No. 2 (2001) 53.

G. Mukherjee et al., Anomalous Reduced Hindrance in 176Hf, Bull. Am. Phys. Soc. 46, No. 2 (2001) 52.

I. Shestakova et al., Yrast K-Isomers in neutron-rich 181Hf , Bull. Am. Phys. Soc. 45, No. 5 (2000) 93.

I. Shestakova et al., Exploring the Dependence on Projectile Characteristics in Populating K-Isomers via Inelastic Excitation , Bull. Am. Phys. Soc. 44, No. 5 (1999) 65.

R. D'Alarcao et al., Studying K-Isomers Populated in U + Hf Reactions with Gammasphere, Bull. Am. Phys. Soc. 44, No. 5 (1999) 65.

I. Shestakova et al., Characterization of Large Ge LEPS Detectors for Gammasphere, Bull. Am. Phys. Soc. 43, No. 10 (1998) 2162.

R. D'Alarcao et al., Multi-qp K-Isomers in Neutron-rich Hf Nuclei via Inelastic Excitation and Transfer with Heavy Beams, in Proc. Conf. on Nuclear Structure '98, Gatlinburg, p.22 (1998).

E. H. Seabury et al., Prompt spectroscopy of odd-A 173,175W nuclei , Bull. Am. Phys. Soc 43, 1585 (1998)

R. D. A'larcao et al., Testing Gammasphere at ATLAS between beam bursts, Bull. Am. Phys. Soc 43, 1573 (1998)

R. D. A'larcao et al., Inelastic excitation of multi-quasiparticle K-isomers in 180,181Hf nuclei, Bull. Am. Phys. Soc 43, 1173 (1998)

P. Chowdhury et al., K-isomers in 174W, Bull. Am. Phys. Soc 42, 1105 (1997)

P. Chowdhury et al., High-K spectroscopy of 174W at Gammasphere , Bull. Am. Phys. Soc 41, 1236 (1996)

P. Chowdhury et al., Exploring high-K isomers in 176W , Bull. Am. Phys. Soc 40, 1630 (1995)
 
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